{"title":"Watts Expansion Tanks","description":"\u003cp style=\"text-align: justify;\"\u003eWatts Expansion Tanks are essential components in plumbing and heating systems, designed to absorb excess water pressure caused by thermal expansion. By preventing overpressure conditions, they protect system components, reduce the risk of leaks, and ensure efficient operation.\u003c\/p\u003e","products":[{"product_id":"lsid4qmmta","title":"Watts 0212000, ETA15 7.8 Gal Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank has a capacity of 7.8 gallons. It is designed to absorb pressure increases in water heating systems, helping to prevent system failures and maintain consistent pressure levels.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219210395870,"sku":"LSID4QMMTA","price":3372.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212000.webp?v=1761921888"},{"product_id":"lsiz65z83p","title":"Watts 0212001, ETA20 10.9 Gal Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to accommodate 10.9 gallons. It functions by absorbing pressure surges in water heating systems, helping to maintain pressure levels and prevent system damage.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219213770974,"sku":"LSIZ65Z83P","price":3451.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212001.webp?v=1761921957"},{"product_id":"lsia0vrbc1","title":"Watts 0212022, ETRA-1200 Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It operates by accommodating the expanded volume of water as it heats, using a diaphragm that separates the water from a pressurized air chamber. This process helps maintain balanced pressure within the heating system and reduces the frequency of valve discharge.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219218718942,"sku":"LSIA0VRBC1","price":17025.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212022.webp?v=1761921926"},{"product_id":"lsiru58if7","title":"Watts 0066610, ETSX-40 1\" Expansion Tank 100 PSI Max","description":"\u003cp\u003eThis Watts expansion tank is designed to accommodate a maximum pressure of 100 pounds per square inch. It features a connection size of 1 inch.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219223044318,"sku":"LSIRU58IF7","price":733.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066610.webp?v=1761922006"},{"product_id":"lsikokzoqm","title":"Watts 0066612, ETSX-90 1.25\" Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure fluctuations in water heating systems. It connects with a 1-1\/4\" pipe fitting, accommodating the expansion of water as it heats, thereby preventing pressure increases that could damage the system.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219226190046,"sku":"LSIKOKZOQM","price":1612.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066612.webp?v=1761921932"},{"product_id":"lsigq23lp2","title":"Watts 0066606, ETX-30 1\/2\" Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, preventing damage to the system. It connects via a 1\/2 inch connection, suitable for standard plumbing installations. The tank helps maintain pressure balance, reducing the frequency of valve discharge and minimizing energy consumption by maintaining an efficient system pressure level.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219305816286,"sku":"LSIGQ23LP2","price":158.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066606.webp?v=1762985393"},{"product_id":"lsikupk3a1","title":"Watts 0067370, PLT-5 Expansion Tank Lead Free","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure fluctuations in water heating systems, maintaining a consistent pressure level and preventing system damage. The tank is lead-free, adhering to safety standards for potable water.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219307847902,"sku":"LSIKUPK3A1","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0067370.webp?v=1761919622"},{"product_id":"lsikoi6jzc","title":"Watts 0067371, PLT-12 Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It maintains system pressure below the relief setting of the system's relief valve. The tank features a diaphragm that separates the air and water, allowing for efficient operation and reduced water logging potential.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219309682910,"sku":"LSIKOI6JZC","price":124.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0067371.webp?v=1761919597"},{"product_id":"lsi9cgzciw","title":"Watts 0067372, PLT-20 Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It maintains system pressure below the relief setting of the system's relief valve, ensuring consistent operation and reducing the frequency of relief valve discharge. This product is suitable for use in domestic hot water systems.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219321020638,"sku":"LSI9CGZCIW","price":422.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0067372.webp?v=1761919714"},{"product_id":"lsilgxy753","title":"Watts 0212002, ETA-40 Non-Potable Expansion Tank Volume 25 Gallons","description":"\u003cp\u003eThis 25-gallon pressurized expansion tank helps manage thermal expansion and stabilize pressure in closed-loop heating and cooling systems. It features a fixed-bladder design built to ASME Section VIII standards, with system water isolated inside a durable butyl bladder to reduce internal corrosion and eliminate waterlogging concerns. The tank is rated for a maximum operating pressure of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219330392286,"sku":"LSILGXY753","price":5157.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212002.webp?v=1761919789"},{"product_id":"lsikufvam8","title":"Watts 0212003, ETA-60 Non-Potable Expansion Tank Volume 35 Gallons","description":"\u003cp\u003eThis 35-gallon pressurized expansion tank provides pressure control in hydronic heating and cooling circuits by capturing expanding system fluid. The tank follows ASME Section VIII construction guidelines and includes a fixed butyl bladder to prevent air-to-water contact and minimize corrosion. It carries a maximum pressure rating of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219331670238,"sku":"LSIKUFVAM8","price":5940.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212003.webp?v=1761919680"},{"product_id":"lsino780i1","title":"Watts 0212004, ETA-80 Non-Potable Expansion Tank","description":"\u003cp\u003eThis 45 gallon pressurized expansion tank is designed to absorb the expansion forces and control the pressure in heating and cooling systems. It is an ASME Section VIII fixed bladder type precharged expansion tank. The excess water is contained in the heavy duty butyl bladder preventing tank corrosion and waterlogging problems. Maximum pressure of 125 psi (8.5 bar).\u003c\/p\u003e\n\n\u003cdiv class=\"product__additional-details\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219334783198,"sku":"LSINO780I1","price":7669.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212004.webp?v=1761919730"},{"product_id":"lsix2d57xt","title":"Watts 0212005, Non-Potable Expansion Tank, ASME Fixed Heavy Duty Butyl Bladder, Volume 60","description":"\u003cp\u003eThis 60 gallon pressurized expansion tank is designed to absorb the expansion forces and control the pressure in heating and cooling systems. It is an ASME Section VIII fixed bladder type precharged expansion tank. The excess water is contained in the heavy duty butyl bladder preventing tank corrosion and waterlogging problems. Maximum pressure of 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219337208030,"sku":"LSIX2D57XT","price":8033.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212005.webp?v=1761919775"},{"product_id":"lsi03ue2s4","title":"Watts 0212006, ETA-120 Non-Potable Expansion Tank Volume 70 Gallons","description":"\u003cp\u003eThis 70-gallon pressurized expansion tank helps stabilize pressure in closed heating and cooling systems by accommodating fluid expansion. Built in compliance with ASME Section VIII, it features a fixed butyl bladder that protects against corrosion and waterlogging. The tank’s maximum operating pressure is 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219338911966,"sku":"LSI03UE2S4","price":9895.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212006.webp?v=1761919815"},{"product_id":"lsit66peok","title":"Watts 0212007, ETA-144 Non-Potable Expansion Tank Volume 80 Gallons","description":"\u003cp\u003eThis 80-gallon pressurized expansion tank helps manage thermal expansion and maintain stable pressure in closed-loop heating and cooling systems. It is built to ASME Section VIII standards and uses a fixed butyl bladder to isolate system water, reducing corrosion and preventing waterlogging. The tank is rated for a maximum working pressure of 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219341926622,"sku":"LSIT66PEOK","price":10625.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212007.webp?v=1761919773"},{"product_id":"lsi45pdz66","title":"Watts 0212008, ETA-180 Non-Potable Expansion Tank Volume 90 Gallons","description":"\u003cp\u003eThis 90-gallon pressurized expansion tank supports heating and cooling systems by absorbing thermal expansion and helping to regulate operating pressure. Constructed to ASME Section VIII requirements, it incorporates a fixed butyl bladder that separates air and water to limit internal corrosion. The tank’s maximum pressure rating is 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219346317534,"sku":"LSI45PDZ66","price":12203.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212008.webp?v=1761919815"},{"product_id":"lsibhyo5ay","title":"Watts 0212010, ETA-240 HVAC Control Module","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It automatically opens when the system's pressure exceeds a preset level, allowing fluid or gas to escape, thereby reducing the internal pressure. Once normal conditions are restored, the valve closes to maintain the desired operating conditions within the system. This device is commonly used in plumbing and heating systems to ensure safety and operational efficiency.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219350446302,"sku":"LSIBHYO5AY","price":6937.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212010.webp?v=1761919896"},{"product_id":"lsihwn1z43","title":"Watts 0212011, ETRA-35 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to automatically release water when the pressure exceeds a preset level, preventing damage to the plumbing system. It is typically installed in domestic water systems and heating applications to maintain safe operating conditions by relieving excess pressure.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219352674526,"sku":"LSIHWN1Z43","price":5120.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212011.webp?v=1761919938"},{"product_id":"lsiy3omjcc","title":"Watts 0212012, ETRA-50 Non-Potable Expansion Tank Volume 13 Gallons","description":"\u003cp\u003eThis 13-gallon pressurized expansion tank is intended for heating and cooling systems that require controlled pressure and expansion relief. It uses a removable butyl bladder for easy replacement and reduced maintenance. Constructed to ASME Section VIII standards, the tank withstands pressures up to 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219353624798,"sku":"LSIY3OMJCC","price":11483.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212012.webp?v=1761919790"},{"product_id":"lsi8jmtazy","title":"Watts 0212013, ETRA-85 Non-Potable Expansion Tank Volume 23 Gallons","description":"\u003cp\u003eThis 23-gallon pressurized expansion tank supports hydronic systems by absorbing thermal expansion and moderating system pressure. It is built to ASME Section VIII specifications and includes a replaceable butyl bladder that minimizes internal corrosion. The maximum working pressure is 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219355427038,"sku":"LSI8JMTAZY","price":11781.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212013.webp?v=1761919832"},{"product_id":"lsibtw74e9","title":"Watts 0212014, ETRA-130 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a set pressure level, allowing fluids or gases to escape, thereby stabilizing the pressure within the system. This valve is typically used in water heating and boiler applications to ensure safe operation by maintaining designated pressure levels.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219357393118,"sku":"LSIBTW74E9","price":5965.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212014.webp?v=1761919886"},{"product_id":"lsi90hb1av","title":"Watts 0212015, ETRA-200 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a set pressure point and allows fluid or gas to escape, thereby stabilizing the pressure within the system. Once normal conditions are restored, the valve closes. This device is commonly used in water heating and plumbing systems to ensure safety and operational efficiency.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219358933214,"sku":"LSI90HB1AV","price":6901.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212015.webp?v=1761919931"},{"product_id":"lsi165ethd","title":"Watts 0212016, ETRA-300 Non-Potable Expansion Tank Volume 79 Gallons","description":"\u003cp\u003eThis 79-gallon pressurized expansion tank provides expansion control for closed-loop heating and cooling applications. It is constructed to ASME Section VIII standards and equipped with a replaceable butyl bladder to enhance system longevity. The tank is rated for pressures up to 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219360866526,"sku":"LSI165ETHD","price":15199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212016.webp?v=1761919966"},{"product_id":"lsi56nkm3b","title":"Watts 0212017, ETRA-400 Non-Potable Expansion Tank Volume 106 Gallons","description":"\u003cp\u003eThis 106-gallon pressurized expansion tank manages pressure fluctuations in hydronic systems by accommodating increased fluid volume. Designed in accordance with ASME Section VIII, it includes a removable butyl bladder to reduce corrosion and simplify servicing. Its maximum pressure rating is 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219362963678,"sku":"LSI56NKM3B","price":15512.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212017.webp?v=1761919865"},{"product_id":"lsioxgifgf","title":"Watts 0212018, ETRA-500 132 Gal Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to accommodate 132 gallons. It functions to absorb pressure surges in water heating systems, maintaining system pressure and preventing pipe damage due to over-pressurization.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219364864222,"sku":"LSIOXGIFGF","price":16365.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212018.webp?v=1761919910"},{"product_id":"lsiseekra5","title":"Watts 0212019, ETRA-600 Non-Potable Expansion Tank Volume 158 Gallons","description":"\u003cp\u003eThis 158-gallon pressurized expansion tank is made for heating and cooling systems that require stable operating pressure and controlled thermal expansion. The tank is built to ASME Section VIII requirements and features a replaceable butyl bladder for long-term reliability. Maximum operating pressure is 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219366731998,"sku":"LSISEEKRA5","price":25228.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212019.webp?v=1761919956"},{"product_id":"lsikljz4bw","title":"Watts 0212020, ETRA-800 Non-Potable Expansion Tank Volume 211 Gallons","description":"\u003cp\u003eThis 211-gallon pressurized expansion tank offers expansion relief and pressure control for closed hydronic systems. It follows ASME Section VIII construction standards and uses a replaceable butyl bladder to protect against corrosion and waterlogging. The tank is rated for a maximum pressure of 125 psi (8.5 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219369517278,"sku":"LSIKLJZ4BW","price":27879.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212020.webp?v=1761919996"},{"product_id":"lsicdbtgef","title":"Watts 0212021, ETRA-1000 HVAC Control Module","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a set pressure point and allows fluid or gas to escape, thereby reducing the internal pressure. Once normal conditions are restored, the valve closes to maintain the desired operating conditions within the system. This product is typically used in water heating and processing systems.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219371647198,"sku":"LSICDBTGEF","price":16281.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212021.webp?v=1761919898"},{"product_id":"lsiaxjg5eo","title":"Watts 0212023, ETRA-1400 HVAC Component","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It is typically installed in water heating systems where it automatically opens at a set pressure level, allowing water or steam to escape, thereby reducing the internal pressure. This action helps maintain system safety and integrity.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219373187294,"sku":"LSIAXJG5EO","price":18527.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212023.webp?v=1761919946"},{"product_id":"lsie806lj9","title":"Watts 0212024, ETRA-1600 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a preset pressure level and allows fluid or gas to escape, thereby reducing the internal pressure. Once normal conditions are restored, the valve closes. This device is commonly used in water heating and plumbing systems to maintain safe operating conditions.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219375186142,"sku":"LSIE806LJ9","price":25501.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212024.webp?v=1761919979"},{"product_id":"lsif9vvup0","title":"Watts 0212025, ETRA-2000 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a set pressure point and allowing fluid to escape, thereby maintaining system integrity. This valve is typically used in water heating and boiler applications to ensure safe operation by controlling pressure levels within the system.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219378430174,"sku":"LSIF9VVUP0","price":27984.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212025.webp?v=1761920030"},{"product_id":"lsibe1m1ol","title":"Watts 0212026, DET A-5 Potable Water Expansion Tank 3\/4 IN MNPT Connection, Volume 3.5 Gallons","description":"\u003cp\u003eThis potable water expansion tank is used with commercial and residential water heaters to absorb thermal expansion and help maintain uniform pressure throughout the water system. The carbon steel tank includes an adjustable air charge, fixed butyl diaphragm, stainless steel inlet, and a standard charging valve. Built to ASME Section VIII construction requirements, it offers a 3.5-gallon capacity and is rated for a maximum pressure of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219381379294,"sku":"LSIBE1M1OL","price":2899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212026.webp?v=1761919986"},{"product_id":"lsi3x0zpe5","title":"Watts 0212030, DET A 42 Potable Water Expansion Tank, 1 IN MNPT Connection, Volume 22 Gallons","description":"\u003cp\u003eThis potable water expansion tank supports water heater and storage tank systems by controlling pressure increases caused by thermal expansion. Its carbon steel body features an adjustable air charge, fixed butyl diaphragm, stainless steel connection, and standard charging valve. Built to ASME Section VIII construction standards, the tank has a 22-gallon capacity and a pressure rating of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219383279838,"sku":"LSI3X0ZPE5","price":4442.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212030.webp?v=1761920032"},{"product_id":"lsi6db6ma3","title":"Watts 0212031, DET A 60 Potable Water Expansion Tank, 1 IN MNPT Connection, Volume 26 Gallons","description":"\u003cp\u003eThis potable water expansion tank helps stabilize pressure in hot water systems by accommodating volume increases from thermal expansion. It includes a fixed butyl diaphragm, field-adjustable air charge, stainless steel inlet, and standard charging valve. Built to ASME Section VIII guidelines, the tank provides a 26-gallon capacity and is rated for 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219385311454,"sku":"LSI6DB6MA3","price":5228.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212031.webp?v=1761920079"},{"product_id":"lsio1z3aeg","title":"Watts 0212032, DET A 80 Potable Water Expansion Tank, Volume 35 Gallons","description":"\u003cp\u003eThis potable water expansion tank helps manage thermal expansion in commercial and residential hot water systems, including gas, oil, electric, and indirect-fired applications. It works to keep system pressure stable and below the relief valve setting by providing space for expanded water. The tank is made from carbon steel and includes an adjustable air charge, a fixed butyl diaphragm approved for potable water use, a 1-inch stainless steel male NPT inlet, and a standard charging valve for onsite adjustment. A sealed diaphragm design keeps air and water separate to support long service life. The tank is built to ASME Section VIII construction standards and is rated for a maximum pressure of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219387637982,"sku":"LSIO1Z3AEG","price":5548.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212032.webp?v=1761920128"},{"product_id":"lsiw1jhfq8","title":"Watts 0212033, DET A 100 Potable Water Expansion Tank,  Volumn 45 Gallons","description":"\u003cp\u003eThis potable water expansion tank is designed to accommodate thermal expansion in hot water systems powered by gas, oil, electric, or indirect-fired heaters. It helps maintain consistent system pressure by providing a controlled area for expanded water volume. Built from carbon steel with an adjustable air charge, the tank features a fixed potable-grade butyl diaphragm, a 1-inch stainless steel male NPT inlet, and a standard charging valve for field adjustment. Its diaphragm construction prevents direct air-to-water contact, improving longevity. The tank meets ASME Section VIII construction requirements and is rated for a maximum working pressure of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219389243614,"sku":"LSIW1JHFQ8","price":6277.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212033.webp?v=1761919981"},{"product_id":"lsiz1ok8ef","title":"Watts 0212035, DET A 160 Potable Water Expansion Tank, 1 1\/2 IN MNPT Connection, Volumn 70 Gallons","description":"\u003cp\u003eThis potable water expansion tank is used with larger water heater and storage applications to manage expansion-related pressure changes. The tank is manufactured from carbon steel with an adjustable air charge, fixed butyl diaphragm, stainless steel connection, and standard charging valve. ASME Section VIII construction supports its 70-gallon capacity and pressure rating of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219391439070,"sku":"LSIZ1OK8EF","price":7004.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212035.webp?v=1761920033"},{"product_id":"lsi1yxbz7w","title":"Watts 0235070, 1 HPX-C Boiler Trim-Out Pack","description":"\u003cp\u003eThis Watts boiler trim-out pack includes components for the installation and operation of a boiler system. It facilitates the connection, control, and maintenance of boiler components to ensure efficient operation. The pack typically contains valves, fittings, and other necessary hardware specific to boiler systems.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219391799518,"sku":"LSI1YXBZ7W","price":782.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0235070.webp?v=1761920051"},{"product_id":"lsio771mef","title":"Watts 0212036, DET A 180 Potable Water Expansion Tank, 1 1\/2 IN MNPT Connection, Volumn 80 Gallons","description":"\u003cp\u003eThis potable water expansion tank helps maintain balanced system pressure by absorbing expansion in commercial and industrial hot water systems. It includes a fixed butyl diaphragm, adjustable air charge, stainless steel connection, and charging valve. Built in accordance with ASME Section VIII, the tank holds 80 gallons and has a maximum pressure rating of 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219392749790,"sku":"LSIO771MEF","price":8456.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212036.webp?v=1761920078"},{"product_id":"lsi4wa0aqr","title":"Watts 0212037, DET A 210 Potable Water Expansion Tank, 1 IN MNPT Connection, Volume 90 Gallons","description":"\u003cp\u003eThis potable water expansion tank is designed for high-demand water heater systems, capturing thermal expansion and helping maintain safe operating pressure. Its carbon steel construction includes a fixed butyl diaphragm, adjustable air charge, stainless steel inlet, and standard charging valve. With ASME Section VIII construction, the tank provides 90 gallons of capacity and withstands pressures up to 150 psi (10 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219394846942,"sku":"LSI4WA0AQR","price":8877.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212037.webp?v=1761920118"},{"product_id":"lsisxc8ngq","title":"Watts 0212038, ETRA-3000 Model","description":"\u003cp\u003eThis Watts pressure relief valve is designed to release excess pressure from a system to prevent damage. It operates by opening at a set pressure point and allows fluid or gas to escape, thereby reducing the internal pressure within the system. Once normal conditions are restored, the valve closes, maintaining the integrity and safety of the system. This component is commonly used in plumbing and heating systems to ensure safe operation.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219396092126,"sku":"LSISXC8NGQ","price":47370.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212038.webp?v=1761920158"},{"product_id":"lsiiae0ill","title":"Watts 0212029, DETA-30 Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It operates by using a diaphragm that separates the water and air, allowing for volume changes due to thermal expansion while maintaining system pressure within safe limits.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219535716574,"sku":"LSIIAE0ILL","price":4158.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0212029.webp?v=1761921073"},{"product_id":"lsi6hp5no0","title":"Watts 0235071, 1.25\" HPX-D Trimout Package","description":"\u003cp\u003eThis Watts trimout package includes components designed for plumbing installations, specifically tailored to fit pipes measuring 1-1\/4 inches. The kit facilitates the final stages of plumbing setup, ensuring connections and terminations are properly covered and secured.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219558195422,"sku":"LSI6HP5NO0","price":782.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0235071.webp?v=1761921273"},{"product_id":"lsiaar9538","title":"Watts 0066609, ETSX-30 Non-Potable Water Expansion Tank, 1 IN FNPT Connection, Volume 15 Gallons, Free Standing","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure fluctuations in water heating systems, maintaining system pressure below the relief setting of the relief valve. It helps prevent frequent cycling of the safety relief valve and provides a location for dissolved gases to separate from the fluid.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219559768286,"sku":"LSIAAR9538","price":738.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066609.webp?v=1761921155"},{"product_id":"lsixzkw8jx","title":"Watts 0066611, ETSX-60 Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It operates by using a diaphragm that separates the water and air within the tank, allowing for volume changes due to thermal expansion without significantly altering system pressure. This functionality aids in maintaining the longevity and efficiency of the heating system.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219561996510,"sku":"LSIXZKW8JX","price":927.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066611.webp?v=1761921197"},{"product_id":"lsizmwpx5x","title":"Watts 0066613, ETSX-110 Non-Potable Water Expansion Tank, 1 1\/4 IN FNPT Connection, Volume 62.0 Gallons, Free Standing","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It maintains system pressure below the relief setting of the system's relief valve, ensuring operational efficiency and safety. The tank features a diaphragm that separates the air and water, allowing for efficient pressure stabilization.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219563536606,"sku":"LSIZMWPX5X","price":2956.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066613.webp?v=1761921253"},{"product_id":"lsibjmhrq7","title":"Watts 0066614, ETSX-160 Non-Potable Water Expansion Tank, 1 1\/4 IN FNPT Connection, Volume 81.0 Gallons, Free Standing","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to maintain balanced pressure and prevent system failures. It integrates into plumbing systems, accommodating the expansion of water as it heats, thereby safeguarding components like valves and pipes from damage due to excess pressure.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219565797598,"sku":"LSIBJMHRQ7","price":3162.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066614.webp?v=1761921297"},{"product_id":"lsiaxpnn1t","title":"Watts 0067373, Potable Water Expansion Tank, 3\/4 IN Male Connection, Volume 14 Gallons","description":"\u003cp\u003eThis Watts potable water expansion tank is designed to absorb the increased volume of water created when it is heated by a boiler or water heater, preventing pressure increases in the domestic water system. This device connects to the home's water supply and uses a diaphragm that divides the tank into two sections: one for water and one for air. As water volume expands, it pushes against the diaphragm, compressing the air on the other side, which helps maintain a balanced pressure in the system and reduces stress on plumbing fixtures.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219567370462,"sku":"LSIAXPNN1T","price":523.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0067373.webp?v=1761921261"},{"product_id":"lsi90satca","title":"Watts 0235089, ETX-ASF 1 1\/4\" Combination Boiler Trim Out Package with 2.1 Gallon Expansion Tank","description":"\u003cp\u003eThis combination boiler trim package is intended for closed-loop hydronic heating systems in both residential and commercial installations. It includes a pre-charged expansion tank, a 1-1\/4 inch cast-iron air separator, and a 1\/8 inch automatic air vent. Together, these components help manage system pressure, remove air from the piping, and support efficient boiler operation. The kit offers a cost-effective way to obtain essential boiler accessories in a single assembly.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219601613022,"sku":"LSI90SATCA","price":436.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0235089.webp?v=1761921512"},{"product_id":"lsi5i1hwq4","title":"Watts 0066605, ET-15 1\/2\", 2.1 Gal Expansion Tank","description":"\u003cp\u003eThis Watts expansion tank is designed to absorb pressure increases in water heating systems, helping to prevent pressure-related damage. It features a 1\/2 inch connection and has a capacity of 2.1 gallons. This product is used to maintain system pressure below the relief setting of the relief valve, thereby reducing rapid pump cycling and water hammer, thus extending the life of the heating system components.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":45219608756446,"sku":"LSI5I1HWQ4","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/8360\/6690\/files\/watts_0066605.webp?v=1761921567"}],"url":"https:\/\/libertysupply.com\/collections\/watts-expansion-tanks.oembed?page=3","provider":"Liberty Supply","version":"1.0","type":"link"}