cUPC Certified|IAPMO Certified|NSF Certified|PHCC Certified

• Strongest tank design featuring deep drawn steel and multi-dome construction Thickest diaphragm heavy-duty butyl or EPDM Projection welded air stem to help eliminate leaks High grade stainless steel connector Deep drawn steel dome Corrosion-proof liner with anti-microbial Protection™ Grooved diaphragm hoop ring for a permanent seal Heavy-duty butyl blend diaphragm Accepts expanded water as system temperature rises and returns hot water to system when demand occurs Patented air cell eliminates pressure surge to protect heat exchanger

AMTROL® invented the thermal expansion tank to absorb expanded water in closed, hot water systems and protect the water heater. Since the beginning, we've kept the pressure on our competitors with features they just can't match like our patented Turbulator®, patent pending anti-microbial liner, patented InSight® service indicator cap and 50 psig pre-charge. When your water heater is on the line, we deliver.