Before starting repairs, assess the condition of your PVB. Common problems include:
To repair your PVB, you may need:
- Locate the main shutoff valve and turn off the water supply to the irrigation system.
- Release any remaining pressure by opening a nearby valve.
- Remove the bonnet screws and take off the cover.
- Carefully extract the internal parts, including the check valve and air inlet assembly.
- Inspect all components for signs of wear, cracks, or deterioration.
- Install new O-rings and gaskets if the old ones appear brittle or damaged.
- Replace the bonnet assembly if it is leaking or cracked.
- Ensure all new components are properly seated before reassembling.
- Reattach the bonnet and tighten screws securely.
- Turn the water supply back on and monitor for leaks.
- If necessary, adjust fittings or replace additional components.
- Water dripping from the air vent indicates a failed check valve or damaged rubber seals.
- Tighten screws and replace worn parts if needed.
- Freezing temperatures or impact damage can crack the valve body.
- If you notice cracks, the entire PVB may need to be replaced.
- A sudden drop in pressure suggests an internal failure or obstruction.
- Check for blockages and ensure all parts are correctly installed.
- Apply Teflon tape to threaded connections to prevent minor leaks.
- Ensure O-rings are lubricated and properly seated.
Regular maintenance of your FEBCO 756 PVB ensures a properly functioning irrigation system and prevents costly repairs. By inspecting and addressing leaks early, you can extend the life of your backflow preventer and maintain water safety.
Have you repaired your PVB recently?