United Spas 12" Hi Limit Sensor [Before 12/2013] (EL121) pooltool and 36 square foot application

and 36 square foot application give this part practical value because DE filter components work best when the replacement matches the intended system family and size closely

Part of a best-selling line with strong related-parts support

The Waterway 505-2050 manifold assembly with laterals is designed for compatible 19 inch Clearwater filter applications

or no longer responds correctly to a momentary air signal

Alternate-action switches are useful because they change state with each actuation and hold that state until the next signal

United Spas 12" Hi Limit Sensor [Before 12/2013] (EL121) pooltool and 36 square foot applicationThe United Spas 12 inch hi limit sensor is designed for compatible applications built before December 2013 where dependable over temperature monitoring is required. Hi limit sensors are useful because they provide the control system with protective feedback that helps guard against unsafe or undesirable temperature conditions. This replacement is especially useful when the original sensor has failed, become inaccurate, or is causing erratic heater