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and a 23-5/16 inch length
or no longer delivers the water movement expected from the whirlpool setup
Supports cleaner and more dependable drilling operation
That flexibility can make a major difference in how the spa feels in daily use
Pentair MasterTemp 400/Max-E-Therm 400 Air Orifice (77707-0113) waterway and a 23-5/16 inch lengthFor 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,
