United Spas 12" Hi Limit Sensor [Before 12/2013] (EL121) pooltool Part of a best-selling line

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

Helps maintain one-way flow in compatible plumbing systems

and the pack may gradually lose the smooth operating rhythm that made the spa enjoyable in the first place

or no longer responds correctly to a momentary air signal

United Spas 12" Hi Limit Sensor [Before 12/2013] (EL121) pooltool Part of a best-selling lineThe 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