Pentair Thermal Regulator Kit | MasterTemp & Max-E-Therm Pool & Spa Heaters | 77707-0010 K1766 Check your spa's filter housing

Check your spa's filter housing — if it has two filter wells

Twist lock cap and adjustable control ring

Wheel Bearings (4)

Distribute: Run your pool pump to circulate evenly throughout the water

Pentair Thermal Regulator Kit | MasterTemp & Max-E-Therm Pool & Spa Heaters | 77707-0010 K1766 Check your spa's filter housingThe Pentair Thermal Regulator Kit (77707 0010) is the OEM replacement thermal regulator assembly for Pentair MasterTemp and Pentair (formerly Sta Rite) Max E Therm pool and spa heaters. IMPORTANT: HEATER COMPONENT LICENSED TECHNICIAN REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper certification. The