Thermal Regulator Compatible with MasterTemp and Sta-Rite Pool Spa Heaters, and All SR200 SR333 SR400 Models, Replace# 77707-0010, 38000-0007S Item Description ?NEEDS?As time goes on, your heater developed a problem where it turns on and off constantly before target temperature was reached. Simply replace this pool heater thermostat control to get rid of the experience where the water temperature take forever to heat up. ?FASTER HEATING?The mastertemp sta rite thermistor has undergone extensive testing, means you will get a fairly reliable thermal regulator to help get your pool spa heater operational, quickly warm the water up and reach the comfortable temperature you want. ?PREMIUM QUALITY?Long life-span matters, that is why our 77707-0010 thermal regulator is composed of high-quality metal, which can effectively prevent corrosion and rust, greatly increase the service life even in salt water environment. ?FITS?The thermal regulator kit is designed to use with Master Temp, Sta-Rite Max-E-Therm pool and spa heaters, and it is located between the inlet and outlet water connections on the water manifold. Product kit includes regulator, spring and cap. ?12-MONTH WARRANTY? If for any reason at all, you are not fully satisfied with the thermistor, simply contact us through amazon message at any time. We will provide comprehensive quality assurance for our product. Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return 25 days from delivery date but product should be in original condition.