Description
GP800820 Pressure Equalizing Filter Cartridge — Kohler Rite-Temp Replacement
The iFJF GP800820 filter cartridge is an essential maintenance component for Kohler Rite-Temp pressure balancing shower valves. This small but critical filter prevents sand, debris, and mineral deposits from entering and damaging the pressure balancing unit — the heart of your temperature control system. Replacing this filter annually is the simplest way to extend the life of your shower valve.
Key Features
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Debris Protection: Fine-mesh filter captures sand, rust particles, and mineral scale before they reach the cartridge
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Extends Valve Life: A $10 filter prevents $100+ cartridge damage from debris scoring
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OEM-Spec Fit: Direct drop-in replacement for Kohler GP800820
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Quick Swap: Replaces in under 5 minutes — accessible without removing the main cartridge
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Universal Rite-Temp Fit: Compatible with all K-304 and K-11748 series valves
Compatibility
| Brand |
Model Series |
Part Number |
| Kohler |
Rite-Temp K-304 |
GP800820 |
| Kohler |
Rite-Temp K-11748 |
GP800820 |
| Kohler |
Rite-Temp K-8300 Series |
GP800820 |
Specifications
| Specification |
Value |
| Part Number |
GP800820 |
| Material |
Plastic body with stainless steel mesh |
| Function |
Water filtration / debris screen |
| Application |
Pressure balancing shower valves |
When to Replace Your GP800820
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Annually: Recommended preventive replacement every 12 months
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After Plumbing Work: Any work on supply lines can dislodge debris — replace the filter afterward
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Temperature Issues: If the shower temperature is unstable, a clogged filter may be restricting flow to the balancing unit
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Hard Water Areas: Replace every 6–9 months if you have hard water (high mineral content)
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Visible Debris: If you pull the filter and see significant buildup — it's time
Installation Steps
- Turn off the water supply to the shower valve
- Remove the shower handle and trim plate
- Locate the GP800820 filter — it's a small cylindrical screen near the cartridge inlet
- Pull out the old filter using needle-nose pliers
- Inspect the filter housing for debris and clean if needed
- Insert the new GP800820 filter, pressing firmly until it seats
- Reassemble the trim plate and handle
- Turn the water back on and run the shower for 30 seconds to flush any loosened debris
Frequently Asked Questions
Q: Do I really need to replace this filter — can't I just clean it?
A: While you can rinse and reuse in a pinch, the fine mesh degrades over time and mineral deposits become embedded. For the low cost, a fresh filter ensures optimal protection for your valve.
Q: Will a clogged filter cause my shower to go cold?
A: Yes! A restricted filter reduces water flow to the pressure balancing unit, which can cause temperature instability — the exact symptom most people assume requires a full cartridge replacement.
Q: Is this the same filter for all Kohler Rite-Temp valves?
A: Yes, the GP800820 is standard across all Kohler Rite-Temp pressure balancing valves from K-304 through K-11748 series.
Q: Do I need to turn off the main water supply?
A: Not always. Many Rite-Temp valves have integral shut-off stops accessible behind the trim plate. If yours has them, you can isolate just the shower without turning off house water.
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