Float Valve Troubleshooting
| Symptom | Probable Cause | Remedy |
| Continuous flow from float pilot system discharge port | Damaged Valve diaphragm | Replace diaphragm |
| Loose diaphragm assembly auxiliary valve | Tighten stem nut | |
| Damaged float pilot control | Replace pilot valve assembly | |
| Main valve fails to close | Too low pressure differential across valve (Need 5 psid min under flowing conditions) | Increase inlet pressure or restrict valve opening with Wilkins X102A flow limiting assembly (Contact Factory) |
| Isolation valve in control tubing closed or clogged X46 strainer | Open isolation valve. Clean strainer | |
| Float and float rod fails to move with liquid level change (stays in down position) | Free float mechanism | |
| Main valve fails to open | Float and float rod fails to move with liquid level change (stays in up position) | Free float mechanism |
| Inlet gate or block valve closed | Open isolation valve | |
| Main valve vibrates when closing | Air in cover | Bleed all air with float in the up position |
Click below for installation and maintenance sheets:
ZW104
Installation and Maintenance sheet 6" and smaller
ZW104
Installation and Maintenance sheet 8" and larger