connect the sample line to the "L" (low) port and leave the "H" (high) port open to the atmosphere

the Rheem-Ruud 42-24166-81 Pressure Switch is the definitive OEM replacement for maintaining the safety loop in two-stage gas furnaces

Can this gauge be used on other boiler brands

it simply provides more "headroom" for the control circuit

Schneider Electric (Erie) VT3223G13A020 Valve Assembly Els PW 17895 connect the sample line toProfessionals in the field know that reliability in hydronic systems starts with a robust valve body and a dependable actuator. The Schneider Electric Erie VT3223G13A020 is a high performance three way zone valve designed for mixing or diverting applications in hot and chilled water systems. Engineered with the Erie PopTop series' signature tool less mounting, this 1 2 inch NPT zone valve allows for rapid actuator replacement without draining the