HVAC and Hydronic Expansion Tanks for Commercial and Residential Systems

Valve Atlas provides a complete selection of expansion tanks for HVAC hydronic heating and cooling systems, domestic hot water systems, and potable water applications. Our expansion tanks protect piping systems from thermal expansion pressure by absorbing volume changes as water temperature fluctuates.

Types of Expansion Tanks

We stock bladder-type and diaphragm-type expansion tanks in capacities from 2 gallons for residential use up to 500 plus gallons for large commercial and industrial hydronic systems. Pre-charged tanks come factory set to standard pressures and can be adjusted on-site.

Hydronic Heating and Cooling

For closed-loop hydronic systems, properly sized expansion tanks maintain system pressure stability and prevent relief valve discharge. Our HVAC expansion tanks are ASME-rated for operating temperatures up to 240 degrees F, suitable for hot water heating, chilled water, and dual-temperature systems.

Potable Water Expansion Tanks

Our potable water expansion tanks feature NSF/ANSI 61 certified bladders safe for drinking water contact. Required by code when a check valve or backflow preventer is installed, these tanks protect domestic hot water heaters from thermal expansion damage.

Sizing and Selection Support

Valve Atlas provides technical support to help engineers and contractors select the right expansion tank. We assist with calculations and submittals for HVAC and plumbing designs. Order with competitive wholesale pricing and fast shipping across North America.

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