Kohler GP876851 Replacement Mixer Cap and Pressure Balance Kit
Mixer cap and pressure balancing unit kit for Kohler and Sterling Rite-Temp single-handle tub and shower valves (K-304 and K-11748).
Replaces these part numbers
| OEM part numbers | Aftermarket equivalents |
|---|---|
| Kohler GP876851 Kohler GP76851 Kohler GP800820 Kohler GP500520 Kohler GP77759 mixer cap Sterling A2758 Legacy Kohler 30086 and 42030 | Everbilt 49868 (cartridge only) Kissler 46-0080 (cartridge only) Home Depot RGP500520 (cartridge only) |
Will it fit?
Fits
- Kohler Rite-Temp single-handle tub and shower valves on the K-304 platform
- Kohler Rite-Temp valves on the K-11748 platform
- Sterling Rite-Temp valves
- Trim families including Devonshire, Forte, Coralais, Bancroft and Memoirs
Not compatible with
- Kohler K-8300 or K-8304 valves (they take GP800881 and K-8305)
- Kohler 3/4 in. Rite-Temp valves
- Kohler thermostatic or MasterShower valves
- Diverter and volume control valves
- Delta, Moen, Pfister or Grohe valves
Is this your part?
Pull the trim and look for a black plastic cap held by two side screws and a metal collar, with a brass splined stem and a red limit stop ring on the cartridge underneath. The cap flange has four lobes with metal bushings at the bolt points, and the cartridge lifts straight out of the brass body once the cap is off.
When to replace it
The shower drips at the head or tub spout after shutoff, weeps around the handle base, drifts lukewarm partway through a shower, or spikes hot when a toilet flushes or a washer fills.
Specifications
| FourHome part | 4H2615173 |
|---|---|
| UPC | 850054895257 |
| Assembled length | 3-5/8 in. |
| Cartridge body diameter | 36 mm |
| Materials | Engineered polymer body, brass stem, metal bolt bushings, EPDM seals |
| Color | Black cap |
What is in the box
- Black mixer cap with four-lobe flange and metal bolt bushings
- Pressure balancing unit with brass splined stem and red limit stop ring
- 4 O-rings
- 2 cap screws
How to install it
Time: 20 to 30 minutes. Tools: Screwdriver, Pliers, Silicone plumber's grease.
- Shut off the water and remove the handle and escutcheon.
- Back out the two side screws and lift off the metal collar and the old cap.
- Draw the old pressure balancing unit straight out with pliers.
- Grease the two small O-rings and the large cap O-ring.
- Seat the new unit level. Do not set it in at an angle and rotate it, which rolls the O-rings out of their grooves and causes a leak.
- Align the cap tab to the notch with the top at 12 o'clock, refit the collar and tighten both screws.
Questions
Does it fit Kohler K-8300 or K-8304 valves?
No. Those valves take the GP800881 and K-8305 cartridge.
Is the mixer cap included?
Yes. The kit includes the mixer cap, the pressure balancing unit, 4 O-rings and 2 cap screws.
Why replace the cap too?
The cap cracks at the bolt bosses and scales on the sealing face over time. A new cartridge under a worn cap can still leak.
Does it fit Sterling Rite-Temp valves?
Yes. It cross-references Sterling A2758.
Related parts
Repair guides
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