Williams P321888 Manifold Adapter Els PW 17895 using a switch with the

using a switch with the exact water column rating is mandatory

the module will lockout and requires a manual reset via the thermostat or power cycle

ensuring reliable refrigerant flow control to prevent liquid slugging of the compressor while maximizing heat transfer efficiency

It should only be used with a 24-volt transformer and intermittent pilot or standing pilot ignition systems depending on the specific boiler series

Williams P321888 Manifold Adapter Els PW 17895 using a switch with theThe Williams P321888 Manifold Adapter is a precision engineered OEM replacement part designed specifically for residential and commercial Williams Forsaire furnaces equipped with a standing pilot system. As a veteran grade HVAC replacement part, this adapter ensures a secure, leak free connection between the gas valve and the burner manifold, critical for maintaining proper manifold gas pressure. Furnace manifold repair often requires specific