Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 LP Orifice (77707-0441) correcttech Matching the correct Hydroseal configuration

Matching the correct Hydroseal configuration helps preserve intended fit and dependable performance

Helps seal water-side heater connections

or no longer provides the fit needed for a clean rebuild

making the repair more straightforward when multiple jet pieces need renewal

Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 LP Orifice (77707-0441) correcttech Matching the correct Hydroseal configurationThis 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