Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 LP Orifice (77707-0441) valveparts The CMP generic backwash valve

The CMP generic backwash valve piston assembly is designed for compatible slide-valve applications where the internal piston section needs replacement

Adjustable Directional Deluxe Scallop] [Dark Gray] is a replacement spa jet internal designed for CMP Poly Jet assemblies with a 3-3/8" face

or heavy use

Supports correct pump strainer service

while the 240V configuration helps keep the replacement aligned with the system’s intended electrical design

Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 LP Orifice (77707-0441) valveparts The CMP generic backwash valveThis LP orifice is used in compatible MasterTemp 400 and Max E Therm 400 heaters configured for propane operation. It helps meter propane flow to the burner system, making correct model and fuel matching essential. If the heater is being serviced after gas train work, conversion work, or a combustion related diagnosis, the orifice should be inspected and verified. Gas heater parts should be installed only by qualified personnel who can confirm safe