77707-0120-Style Manifold O-Ring – Fits Pentair MasterTemp / Max-E-Therm Pool & Spa Heaters Air Pressure Switch 4-Pin Red Terminal Bar Connector

4-Pin Red Terminal Bar Connector (AquaLink-Style):This aftermarket replacement-compatible 4-pin red terminal bar connector is designed for use in pool and spa automation control wiring

Heater & Valve Systems

It works well even in harsh pool conditions

Made for Pentair Purex SM and SMBW 4000 Series Filters

● Environmentally Friendly

77707-0120-Style Manifold O-Ring – Fits Pentair MasterTemp / Max-E-Therm Pool & Spa Heaters Air Pressure Switch 4-Pin Red Terminal Bar Connector77707 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