Common Questions What is the purpose of the OPD on this Maxitrol regulator

Universal OEM Compatibility: Verified replacement for Marvair part numbers 70281-SP

This Series 3 actuator is designed to provide precise positioning of automatic air dampers in high-demand HVAC systems

this ICP txv valve assembly includes the integrated power element and capillary tube for sensing suction line temperature to modulate flow

whereas a 2-pole unit only breaks two lines

Watts 0274427 Valve 319848-301 Common Questions What is theThe Watts Series 174A (Ordering Code 0274427) is a high capacity boiler pressure relief valve designed specifically for hot water heating boilers and water supply heaters. This 3 4 inch NPT female inlet outlet valve is engineered with a bronze body and a non metallic disc to metal seat, ensuring consistent performance in high temperature hydronic systems. With a factory set 35 PSI pressure relief and a high steam discharge capacity of 725,000 BTU Hr,