Kohler GP500520 and GP800820 Replacement Pressure Balance Cartridge
Pressure balancing cartridge for Kohler and Sterling Rite-Temp 1/2 in. single-handle tub and shower valves. Reuses the mixer cap on your valve.
Replaces these part numbers
| OEM part numbers | Aftermarket equivalents |
|---|---|
| Kohler GP500520 Kohler RGP500520 Kohler GP800820 Sterling A2758 | Everbilt 49868 Kissler 46-0080 |
Will it fit?
Fits
- Kohler Rite-Temp 1/2 in. single-handle pressure balancing valves
- Kohler K-304 and K-11748 valve bodies
- Sterling Rite-Temp valves
Not compatible with
- Kohler thermostatic or MasterShower valves
- Kohler two-handle or three-handle faucets
- Kohler lavatory or kitchen cartridges
- Single-handle shower valves from other brands
Is this your part?
Pull the handle and escutcheon and remove the black plastic mixer cap. The balancing cartridge is the dark spool behind it in the valve body. Rite-Temp rough-in valves carry K-304 or K-11748 on the casting. If the cap itself is cracked or scaled, buy the GP876851 kit, which includes a new cap.
When to replace it
The shower swings hot or cold when a toilet flushes, runs lukewarm and will not come up to temperature, drips from the head with the handle off, or goes weak on one side.
Specifications
| FourHome part | 4H2615119 |
|---|---|
| UPC | 850054895226 |
| Body | Black engineered polymer spool |
| Balancing element | Brass |
| Seals | Factory-lubricated O-rings |
| Valve size | 1/2 in. Rite-Temp |
| Pieces | 1 cartridge |
What is in the box
- 1 pressure balancing cartridge
- Mixer cap not included: reuse yours, or buy the GP876851 kit
How to install it
Time: About 20 minutes. Tools: Screwdriver, Allen key, Pliers, Silicone plumber's grease.
- Shut off the water at the stops or the main.
- Remove the handle and escutcheon, then take off the mixer cap.
- Pull the old cartridge straight out.
- Grease the O-rings with silicone grease, never petroleum grease.
- Push the new cartridge in level at the same orientation as the old one. Do not twist it in at an angle.
- Refit the mixer cap and trim, then turn the water back on.
Questions
Is the mixer cap included?
No. This is the cartridge only. The GP876851 kit includes a new mixer cap and cartridge.
Does it fit Sterling Rite-Temp valves?
Yes. It cross-references Sterling A2758.
Does it fit Kohler thermostatic valves?
No. It fits Rite-Temp pressure balancing valves only.
Why is my shower still lukewarm after the swap?
Check the rotational limit stop on the handle adapter and reset it to reach full hot.
Related parts
Repair guides
FourHome is not affiliated with or endorsed by any faucet manufacturer. Brand names and part numbers are used only to identify compatibility.