Pentair MasterTemp 400/Max-E-Therm 400 Air Orifice (77707-0113) plugs The Raypak Unitherm Governor is

The Raypak Unitherm Governor is designed for compatible 105A

Confirm equipment model

and WhisperFlo pump applications

2 foot length

Part number 9920-401022 is included for easier cross-reference during ordering and maintenance

Pentair MasterTemp 400/Max-E-Therm 400 Air Orifice (77707-0113) plugs The Raypak Unitherm Governor isFor service work on Pentair pool equipment, choosing the exact replacement part helps reduce callbacks and installation delays. This MasterTemp 400 Max E Therm 400 Air Orifice is used in the heater combustion system to help meter the air path for the correct burner configuration. Because orifice sizing affects how the heater breathes and fires, this is a precision replacement part rather than a generic fitting. Always compare the existing part,