Pentair MasterTemp/Max-E-Therm Thermal Regulator Kit (77707-0010) littlegiant A weir door like this

A weir door like this is useful because it restores the moving skimmer entry door that helps regulate surface flow into the skimmer body

Part number 3010 provides a reliable reference for service matching

and 25 amp rating

Improves cleaner mobility and scrubbing performance

Designed for pool and spa plumbing service applications

Pentair MasterTemp/Max-E-Therm Thermal Regulator Kit (77707-0010) littlegiant A weir door like thisFor service work on Pentair pool equipment, choosing the exact replacement part helps reduce callbacks and installation delays. This MasterTemp and Max E Therm Thermal Regulator Kit is regulates internal heater water temperature flow behavior to help protect the heat exchanger and maintain proper heater operation. When this component sticks, weakens, or fails, symptoms can include overheating, cycling, reduced efficiency, or temperature related