What It Means
Backup Valve Timer or Wear
Likely Causes
- Backup valve timer set too infrequently or too frequently
- Backup valve diaphragm worn or cracked
- Debris lodged in backup valve seat
- Low flow reducing valve actuation pressure
Next Checks
- Adjust backup valve timer — optimal is every 3-5 minutes (1/3 turn setting on most models)
- Remove backup valve and inspect diaphragm — replace if cracked or stiff
- Flush valve with clean water to clear debris
- Test with a new backup valve if diagnosis is unclear — they are inexpensive and commonly replaced
Verify Before Repair
SplashLens is a field reference, not a repair guarantee. Confirm the visible code, exact model, and current manufacturer procedure before replacing parts, bypassing safeties, or quoting a customer.
SplashLens is independent and is not affiliated with Polaris (Zodiac) or other equipment manufacturers.
Use SplashLens At The Pad
Manual error-code lookup works after the app has loaded once. AI scan features require internet and should be treated as a second set of eyes.