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Bell & Gossett Compression Tanks

Compression tanks are pressure control vessels designed to absorb thermal expansion in closed-loop hydronic heating and cooling systems. Their compression tank design helps manage system volume changes and maintain stable operating pressure, making them well suited for applications where dependable expansion control, equipment protection, and reliable long-term system performance are important.

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Bell & Gossett 24-Gallon No. 24 Compression Tank 116030
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Bell & Gossett 24-Gallon No. 24 Compression Tank 116030
Sale price$1,096.95 Regular price$1,554.00
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Bell & Gossett 30-Gallon No. 30 Compression Tank 116031
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Bell & Gossett 30-Gallon No. 30 Compression Tank 116031
Sale price$1,236.95 Regular price$1,751.00
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Bell & Gossett 15-Gallon No. 15 Expansion Tank 116029
Bell & Gossett
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Bell & Gossett 15-Gallon No. 15 Expansion Tank 116029
Sale price$1,034.95 Regular price$1,465.00
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Bell & Gossett 40-Gallon No. 40 Compression Tank 116032
Bell & Gossett
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Bell & Gossett 40-Gallon No. 40 Compression Tank 116032
Sale price$1,322.95 Regular price$1,874.00
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Bell & Gossett 60-Gallon No. 60 Compression Tank 116033
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Bell & Gossett 60-Gallon No. 60 Compression Tank 116033
Sale price$1,586.95 Regular price$2,248.00
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Bell & Gossett 80-Gallon No. 80 Compression Tank 116034
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Bell & Gossett 80-Gallon No. 80 Compression Tank 116034
Sale price$1,783.95 Regular price$2,527.00
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Bell & Gossett 100-Gallon No. 100 Compression Tank 116035
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Bell & Gossett 100-Gallon No. 100 Compression Tank 116035
Sale price$2,306.95 Regular price$3,268.00
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Bell & Gossett 120-Gallon No. 120 Compression Tank 116036
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Bell & Gossett 120-Gallon No. 120 Compression Tank 116036
Sale price$2,645.95 Regular price$3,748.00
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Bell & Gossett 135-Gallon No. 135 Compression Tank 116037
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Bell & Gossett 135-Gallon No. 135 Compression Tank 116037
Sale price$2,773.95 Regular price$3,929.00
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Bell & Gossett 175-Gallon No. 175 Compression Tank 116038
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Bell & Gossett 175-Gallon No. 175 Compression Tank 116038
Sale price$3,955.95 Regular price$5,604.00
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Bell & Gossett 220-Gallon No. 220 Compression Tank 116039
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Bell & Gossett 220-Gallon No. 220 Compression Tank 116039
Sale price$4,639.95 Regular price$6,573.00
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Bell & Gossett 400-Gallon No. 400 Compression Tank 116042
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Bell & Gossett 400-Gallon No. 400 Compression Tank 116042
Sale price$7,649.95 Regular price$12,749.00
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Bell & Gossett 305-Gallon No. 305 Compression Tank 116041
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Bell & Gossett 305-Gallon No. 305 Compression Tank 116041
Sale price$6,566.95 Regular price$10,945.00
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Bell & Gossett 240-Gallon No. 240 Compression Tank 116040
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Bell & Gossett 240-Gallon No. 240 Compression Tank 116040
Sale price$5,290.95 Regular price$7,494.00
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A Bell & Gossett compression tank on closed hydronic systems provides adequate pressurization under all operating conditions. Above all, a compression tank must be airtight. Compression tanks absorb the expansion forces of the system water and provide proper pressurization under varying operating conditions. In addition, when used with Airtrol Fittings, it offers positive air control.

Compression Tank Features:

  • Absorbs the expansion forces of system water and provides proper pressurization under varying operating conditions
  • Tanks sizes: 15-505 gallons
  • Standard working pressures: 150 psi for 15-100 gallon tanks, 125 psi for 120-505 gallon tanks
    • Higher pressure vessels available (up to 300 psi)
    • High maximum design temperature of 650ºF
  • Black steel construction
  • Guaranteed leakproof
  • Standard gauge glass tappings
  • Constructed of carbon steel per Section VIII, Division I of the ASME Boiler and Pressure Vessel Code – and so stamped

From the Atoms & Bits Blog

Bell & Gossett Expansion Tanks: Models Overview

Bell & Gossett Expansion Tanks: Models Overview

Published: May 21, 2026 By: Lucas Gasparotto

Bell and Gossett expansion tanks help protect hydronic, plumbing, and well water systems from pressure problems caused by thermal expansion and pump cycling. This guide explains how B&G expansi...

Expansion Tanks vs. Buffer Tanks

Expansion Tanks vs. Buffer Tanks

Published: Feb 28, 2023 By: Laura Eck

An expansion tank allows for the expansion and contraction of a system when it heats up and cools off and provides head pressure for the circulation pump. A buffer tank adds volume to a heating or ...

Expansion Tank vs. Pressure Tank

Expansion Tanks vs. Pressure Tanks

Published: Jan 25, 2023 By: Laura Eck

Although very similar, pressure tanks and expansion tanks perform unique functions. Expansion tanks compensate for water expansion in closed-loop systems, while pressure tanks maintain the water pr...

Bladder Tanks vs. Diaphragm Tanks

Bladder Tanks vs. Diaphragm Tanks

Published: Nov 01, 2022 By: Laura Eck

Bladder expansion tanks contain a balloon-like bladder that can be replaced when required. On the other hand, a diaphragm expansion tank includes a flat diaphragm directly mounted to the tank.

Bell & Gossett Expansion Tanks

Under Pressure: Bell & Gossett Expansion Tanks

Published: Jul 11, 2022 By: Laura Eck

Bell & Gossett offers a wide selection of expansion tanks for proper system pressurization in hydronic heating and potable water (plumbing) systems.

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