BackStop® Thermal Expansion Tanks

BackStop® Hydronic Expansion Tanks absorb the expansion pressure in residential or commercial hydronic (forced hot water) heating and cooling systems. Each tank is pressure rated up to 150 PSI and equipped with a carbon steel connection. High-grade, deep drawn steel is used for improved strength-to-weight ratio.

BackStop® A Series Tanks are fixed-diaphragm type, pre-charged thermal expansion tanks that are designed to absorb the expansion forces and control the pressure in potable water systems. Water is contained using the heavy-duty diaphragm with a FDA grade polypropylene liner preventing tank corrosion and waterlogging problems.

All Tanks have a 6 Year Limited Warranty (Manufacturer Defects Only)

SKU	Description	Vol. (Gal.)	Inlet	Preset Pressure	Price	Buy
HE12-H15	Hydronic Expansion Tank	2.1	1/2"	12 psi	$38.40
HE12-H30	Hydronic Expansion Tank	4.5	1/2"	12 psi	$50.00
HE12-H60	Hydronic Expansion Tank	6	1/2"	12 psi	$63.85
HE12-A101	A Series Expansion Tank	2	3/4"	35 psi	$42.95
HE12-A102	A Series Expansion Tank	4.5	3/4"	35 psi	$58.25