Taco CA140-125P - Full-Acceptance Expansion Tank - 37 Gallon

The Taco CA140-125P is a 37-gallon, ASME-certified bladder expansion tank engineered for hydronic heating, cooling, and pressure booster systems. Built with a carbon steel shell and a heavy-duty butyl bladder, it ensures permanent separation between air and water to manage thermal expansion reliably and efficiently.

Unlike basic compression tanks, the CA140-125P uses a replaceable bladder to contain the expanding water, while a pre-charged air cushion on the shell side absorbs pressure changes. This design minimizes air absorption into the water and reduces the need for frequent maintenance or recharging.

Features

37-gallon bladder-style expansion tank for closed water systems
ASME Code Section VIII, Div. 1 construction
125 PSI @ 240°F standard design pressure and temperature
Removable butyl bladder for permanent air/water separation and easy inspection
Carbon steel shell with red oxide primer exterior finish
Factory precharged to 40 PSI (field adjustable)
NSF/ANSI 61-G certified for potable water use
U-1A Data Report and National Board registered

Applications

Closed hydronic heating and chilled water systems
Pressure booster and potable water systems
Commercial and institutional HVAC installations
Systems requiring ASME and NSF-compliant thermal expansion control

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Collection: Expansion Tanks

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CA140-125P - Full-Acceptance Expansion Tank - 37 Gallon

PAX170-150 - Potable Water Expansion Tank - 45 Gallon