The AB-40 features a brass body and a •combo connection• which allows either a threaded or sweat copper connection with the same union tail piece. The AB-40 also provides an inbuilt bypass for rapid filling, high pressure testing and system purging. The A-41 provides increased capacity for larger boilers. It has threaded female connections and an iron body with a stainless steel seat. Both the AB-40 and A-41 have a heat resistant diaphragm and seat disc, inbuilt strainer screen and inbuilt check valve. The reduced pressure setting is 14 psi. The maximum inlet working pressure is 200 psi.
NOTE: FOR BACKFLOW PREVENTION OF BOILER WATER INTO THE POTABLE WATER SUPPLY LINE, INSTALL A BFP VALVE.
For hot water space heating boilers. Designed for larger boilers requiring faster filling.
3/4 (A-41) and 1/2 (AB-40)