Kohler exact part record
Kohler GP876851: application and identification
GP876851 is a mixer cap and pressure-balancing unit tied to documented Kohler applications. Confirm the model, generation, and installed geometry before purchase.
Direct answer
Kohler's service material identifies GP876851 as a mixer-cap and pressure-balancing-unit service kit for K-304 Rite-Temp valves. This is a source-backed application, not a fit claim based on visual similarity. Verify K-304 on the valve documentation or service identification; do not transfer a K-304 recommendation to K-8304 simply because both use Rite-Temp trim.
Fit facts
What identifies this match
Use these details together. One matching feature does not establish compatibility.
- Manufacturer
- Kohler
- Service part
- GP876851
- Documented system
- Rite-Temp K-304 pressure-balancing valve
- Fixture
- Tub and shower valve
- Part type
- Mixer cap and pressure-balancing unit
- Control configuration
- Single-handle pressure-balancing valve
Documented application
Kohler's service material identifies GP876851 as a mixer-cap and pressure-balancing-unit service kit for K-304 Rite-Temp valves.
The relationship should be confirmed in the official service record for the complete faucet or rough-in model. A family name or matching trim is useful evidence, but it is not the same as a model-level parts callout.
Generation and configuration check
Verify K-304 on the valve documentation or service identification; do not transfer a K-304 recommendation to K-8304 simply because both use Rite-Temp trim.
Record whether the control is single-handle pressure-balancing valve and whether the service diagram describes the complete assembly or only the replaceable internal component.
Physical confirmation
Check whether the repair calls for the complete mixer-cap/balancing assembly rather than a later standalone cartridge.
Shut off the water and remove the existing part only when the fixture can be safely returned to service. Photograph its installed orientation and keep every retainer for comparison.
Purchase decision
Order GP876851 only when the official model relationship and the installed configuration agree. If either check conflicts, pause and identify the complete faucet or concealed valve before buying.
Do not infer compatibility from color, finish, handle style, or a marketplace photo. Those cues can group candidates, but they do not supersede the manufacturer's parts diagram.
Questions
Before you remove or replace the part
Is GP876851 compatible with every Kohler tub and shower valve?
No. Kohler's service material identifies GP876851 as a mixer-cap and pressure-balancing-unit service kit for K-304 Rite-Temp valves. Confirm the complete model and generation in Kohler's support material.
Can trim style identify the internal part?
Not reliably. Trim may be shared across valves, retained during updates, or visually similar across generations. Use the rough-in or faucet model and the installed component.
What should I compare after removal?
Compare the stem interface, body dimensions, locating features, seals, ports, rotation or side, and retention method with the official GP876851 service image.