or AV series) must be sourced separately based on your required torque and control signal

Because this is a variable speed DC motor

When should the cover gaskets be replaced

or 90 minutes

Hydrotherm BM-8787 Pilot Assembly 318172-701 or AV series) must beFor service technicians maintaining legacy hydronic systems, the Hydrotherm BM 8787 Pilot Assembly is a direct replacement OEM component designed to restore reliable ignition in Hydrotherm boilers and water heaters. As a complete pilot burner assembly, the BM 8787 includes the specialized bracketry, pilot orifice, and thermocouple connection necessary to interface with your existing gas valve. Precision engineered for high temperature durability, this