Taco 121-138 Series In-Line Circulator Pumps

Taco 121-138 Series In-Line Circulator Pumps for Hydronic Heating, Chilled Water, Solar, and Domestic Hot Water Systems

Taco 121-138 Series in-line circulator pumps are designed to efficiently circulate heated or chilled water in residential, commercial, hydronic, and solar system applications. With millions of units in service and more than five decades of field experience behind the design, these circulators are built for proven performance, dependable operation, and long service life.

The 121-138 Series can be used in a wide range of system layouts, including large zoned installations, primary-secondary systems, and parallel pumping designs. Their rugged construction and quiet operation make them a practical choice for mechanical rooms, commercial hydronic loops, chilled water circulation, solar systems, and domestic hot water applications.

A unique universal cartridge design helps support long bearing life while making service easier and more cost-effective. Each pump is 100% factory tested and built with a carbon ceramic mechanical seal, rugged resilient-mounted motor, and durable construction for reliable system performance.

For domestic hot water and fresh water service, select models are available in stainless steel construction, providing an option for applications where corrosion resistance and potable water compatibility are important.

Features

• In-line circulator pump design
• Designed for residential and commercial hydronic systems
• Efficiently circulates heated or chilled water
• Suitable for hydronic heating, chilled water, solar, and domestic hot water applications
• Backed by more than five decades of circulator experience
• Dependable, quiet operation
• Compatible with primary-secondary system designs
• Supports parallel pumping layouts
• Unique universal cartridge design helps extend bearing life
• Carbon ceramic mechanical seal
• Rugged resilient-mounted motor
• 100% factory tested
• Designed for easy, low-cost service
• Available in stainless steel construction for domestic hot water and fresh water service
• Flow range: 0 to 160 GPM
• Head range: 0 to 40 feet
• Maximum fluid temperature: 250°F
• Maximum operating pressure: 150 PSI
• Horsepower range: 1/4 to 1 HP
• Connection sizes: 2-1/2" to 3"

Applications

• Residential hydronic heating systems
• Commercial hydronic heating systems
• Chilled water circulation
• Commercial solar systems
• Domestic hot water heating
• Domestic hot water recirculation
  
• Primary-secondary pumping systems
• Parallel pumping systems