It is millivolt compatible and designed for use with heat pumps that do not require auxiliary or emergency heat

withstanding temperatures from -40 to 131°F

Is this valve suitable for lead-free potable water systems

s high-voltage electrical circuit is immediately broken when the blower access panel is removed

Technicians should check for fault codes on the integrated furnace control (IFC)

Watts 0274426 Valve 321142-301 It is millivolt compatible andThe Watts 0274426 (Series 174A) is a heavy duty 3 4" bronze boiler pressure relief valve engineered specifically for high capacity protection in hot water heating systems and domestic supply boilers. Rated for a 33 PSI set pressure with a massive steam discharge capacity of 695,000 BTU hr, this valve is a critical safety component designed to prevent catastrophic over pressurization. It features a rugged bronze body and a stainless steel spring for