GC Valves S201 Series Rebuild Kit (AC)

This rebuild kit (KS201AH02J7GJ2) provides the complete internal core assembly, seals, and o-rings needed to fully rebuild a GC Valves S201 series 2-way NC diaphragm valve for AC-coil operation. This kit is shared across 2 valve configurations in the S201 series. Unlike a repair kit, a rebuild kit replaces the core assembly itself along with the full seal set, restoring a worn or sticking valve to full original performance rather than just stopping a leak. This is the recommended kit when a valve is slow to actuate, buzzing, or not fully opening or closing, since those symptoms usually point to core wear rather than just seal wear. Genuine GC Valves parts keep the rebuilt valve within its factory pressure, temperature, and media-compatibility ratings.