GP76851 Mixer Cap and Pressure Balancing Unit (Shower) Parts Cartridge Compatible with Kohler ，Fit for Rite-Temp and 1/2" Shower Valve GP500520 and GP77759 Parts After Market Replacement

• 1. Controls pressure and regulates temperature to ensure a gracious shower experience, repairing the problem of old equipment leakage and cannot mix hot and cold water correctly.
• 2.Consists of the parts replace for the #GP500520 and #GP77759， Includes cartridge and mixer cap for 1/2" valve. Compatible with most Rite-Temp valves.
• 3. Including the sandpaper, which can help you remove scale and avoid leakage caused by scale.
• 4.Please confirm the model before purchasing.
• 5. Please pay attention to the correct installation of the O-ring, the O-ring needs to be placed flat in the groove, dont rotate the cartridge, just put it directly.

replace for the model#GP500520 and GP77759 for 1/2" Shower Valve,AND Controls pressure and regulates temperature to ensure a gracious shower experience. for leakage 1.O-ring is the key, must be replaced, and add lubricant, then firmly placed in the correct position. 2. Do not rotate the Cartridge, just put it in, otherwise the O-ring will shift and cause leakage. 3. Tighten the screws to fix the cap and the Cartridge, or will also cause leakage.Please note it is not genuine Kohler.