100289450 is the official direct replacement for 100288891

Maintain the operational integrity of your heating equipment with the Williams P500472 Limit Switch

5VDC pulse width modulated (PWM) signal at 80Hz to drive the motor

As a 2-speed motor

including the GCS24

Resideo V8043A1037 Valve 326058-758 100289450 is the official directThe Resideo V8043A1037 Valve is a professional grade, 2 way normally closed zone valve engineered for precision hydronic control in closed loop systems. This 1 inch sweat connection zone valve features a robust brass body and stainless steel stem, designed to withstand fluid temperatures from 50F to 200F. Operating on a 24Vac hydronic valve actuator, it utilizes a spring return to close mechanism with a 3. 5 Cv flow capacity and a 20 psi maximum close