Tube Sheet Coil Sealing Manifold O-Ring Kit Compatible with Pentair Mastertemp and Sta Rite Max-E-Therm Pool and Spa Heater 77707-0120 - Made in USA- Made to Work With Select Pentair Heater Models: The Manifold O-Ring is compatible with Pentair MasterTemp Heaters and Sta-Rite Max-E-Therm Heaters. All BTU's are compatible.
- Identify the Problem: Open up your Pentair Mastertemp 400 Heater and locate the Manifold. If you notice the manifold leaking from the edges then it is the manifold o-ring that needs to be changed.
- Install With Ease: Take off the 10 screws. Using a screwdriver pop the lid out of the manifold evenly. Install the Swimables version and push it in the same way it was taken out.
- Purpose: The purpose of this oring set is to ensure that the water traveling through the heater manifold does not leak through the points at which the manifold meets.
- Location: This oring set is located inside of your Pentair Mastertemp parts in the middle of black manifold that holds all of the sensors. You will notice 10 screws holding the manifold together.
