Amtrol St-5 Spec Sheet - Web expansion tank t & p valve water heater deep drawn construction deep drawing the domes doubles the strength of the steel. Requires half the welds vs. 50 psig (3.5 bar) stand models: 200º f (93º c) max. Inspect for shipping damage and notify freight carrier or store where purchased. Integral diaphragm design features a. Inspect for shipping damage and notify freight carrier. 40 psig (2.8 bar) performance.
Requires half the welds vs. 50 psig (3.5 bar) stand models: Integral diaphragm design features a. Web expansion tank t & p valve water heater deep drawn construction deep drawing the domes doubles the strength of the steel. 40 psig (2.8 bar) performance. 200º f (93º c) max. Inspect for shipping damage and notify freight carrier. Inspect for shipping damage and notify freight carrier or store where purchased.