Hayward H-Series Flow Control Thermostat (HAXFCT1930) pentairpurex k19 topside needs a 4-button

k19 topside needs a 4-button overlay to restore readable control labeling

Supports cleaner and more accurate electrical maintenance

Helps retain filter media during normal filtration operation

The Waterway 210-5830 Poly Jet body is designed for compatible jet assemblies and features 1 inch slip connections for both air and water

Designed for use with vinyl pool wall returns

Hayward H-Series Flow Control Thermostat (HAXFCT1930) pentairpurex k19 topside needs a 4-buttonPrecise heater control depends on sensors and thermostatic components that respond properly to changing water conditions. This Hayward H Series flow control thermostat is a replacement service part for compatible H Series heaters, supporting proper heater monitoring and operation within the control system. If a heater is showing inconsistent operation, failing to maintain temperature, or presenting control related symptoms, this component may be part