77707-0120-Style Manifold O-Ring – Fits Pentair MasterTemp / Max-E-Therm Pool & Spa Heaters Air Pressure Switch Heater & Valve Systems

Heater & Valve Systems

● Weight:    2

Perfect cap seal for Pentair 4000 Series

4x copper washers

77707-0120-Style Manifold O-Ring – Fits Pentair MasterTemp / Max-E-Therm Pool & Spa Heaters Air Pressure Switch Heater & Valve Systems77707 0120 Manifold O Ring Replacement 77707 0120 Manifold O Ring Replacement: The 77707 0120 manifold O ring is an aftermarket replacement compatible with Pentair MasterTemp and Max E Therm style pool and spa heaters. This O ring forms a critical seal within the heaters manifold assembly, helping prevent leaks and ensuring consistent water flow through the heating system. Alternate Parts: PEN77707 0120, PEN777070120(Alternate part numbers are listed