Kohler exact part record
Kohler GP800820: application and identification
GP800820 is a pressure-balancing cartridge tied to documented Kohler applications. Confirm the model, generation, and installed geometry before purchase.
Direct answer
Kohler identifies GP800820 as the replacement pressure-balancing cartridge used with the K-8304 Rite-Temp valve platform. This is a source-backed application, not a fit claim based on visual similarity. Confirm that the concealed valve is K-8304; Rite-Temp trim by itself does not establish which valve generation is behind the wall.
Fit facts
What identifies this match
Use these details together. One matching feature does not establish compatibility.
- Manufacturer
- Kohler
- Service part
- GP800820
- Documented system
- Rite-Temp K-8304 pressure-balancing valve
- Fixture
- Tub and shower valve
- Part type
- Pressure-balancing cartridge
- Control configuration
- Single-handle pressure-balancing valve
Documented application
Kohler identifies GP800820 as the replacement pressure-balancing cartridge used with the K-8304 Rite-Temp valve platform.
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
Confirm that the concealed valve is K-8304; Rite-Temp trim by itself does not establish which valve generation is behind the wall.
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
Compare the removed assembly's stem, indexing features, seals, and overall body layout with Kohler's service-part image.
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 GP800820 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 GP800820 compatible with every Kohler tub and shower valve?
No. Kohler identifies GP800820 as the replacement pressure-balancing cartridge used with the K-8304 Rite-Temp valve platform. 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 GP800820 service image.