This 40VA unit provides more headroom for additional relays or zone valves

Adjustable Service: Lever arm design allows for precise calibration of the shut-off point based on the specific buoyancy of the attached float

which requires a replacement to prevent delayed ignition or "booming

this replacement knob retains the same physical dimensions and stem attachment for both the original series and the newer Lead-Free (LF) versions of the Watts 70A valves

Can this switch be used in a single-stage furnace

Weil McLain 510-312-041 Aquastat Els PW 17895 This 40VA unit provides moreThe Weil McLain 510 312 041 Aquastat is a mission critical hydronic temperature controller engineered for precise thermal regulation within Weil McLain boiler systems, including the EGH series. This OEM immersion controller utilizes an integrated capillary sensor to monitor the heating medium, providing high accuracy feedback to the burner and circulator circuits. With an adjustable temperature range of 100F to 240F, this unit ensures the system