Pentair MasterTemp 400/Max-E-Therm 400 Air Orifice (77707-0113) plugs Part number 9920-401022 is included

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

A fitting like this is useful because it restores the structural body of the suction assembly while preserving the larger plumbing format used by the original installation

Helps improve rebuild stability and sealing confidence

a correctly matched replacement can restore a much better day-to-day experience

Use part 350029Z when the existing component is worn

Pentair MasterTemp 400/Max-E-Therm 400 Air Orifice (77707-0113) plugs Part number 9920-401022 is includedFor 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,