Kafko 1 1 2" FPT x 1 1 2" S Equator Inlet Fitting (20 0225 5) grundfos The tank body is one The tank body is one of the most important structural parts of the assembly because it houses the filter media and supports the core operating function of the system This type of replacement is especially useful when the rest of the heater remains serviceable and the weakness is isolated to the thermostat itself This part has practical value because the mixed FPT and slip configuration is more application specific than a general straight fitting and this Kafko Equator version features a 1 1 2 inch female pipe thread by 1 1 2 inch slip configuration using the 20 0225 5 reference