Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 Natural Gas Orifice (77707-0411) filburmfg end cap style

end cap style

filtration performance can suffer and sand may appear in the pool return lines

In heater work

0kW trombone style heater is built for that type of setup

Supports the mechanical action of the cleaner’s scrubber system

Pentair Sta-Rite MasterTemp 400/Max-E-Therm 400 Natural Gas Orifice (77707-0411) filburmfg end cap styleThis natural gas orifice is intended for compatible 400K MasterTemp and Max E Therm heater gas systems. The part helps meter natural gas flow to support the correct burner operation for the heaters design. It may be needed during gas train service, repair after incorrect parts were installed, or fuel configuration work. Because combustion safety depends on accurate part selection and testing, service should be performed by a qualified technician.