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How to Repair Febco 765 PVB

How to Repair Febco 765 PVB

If you have a Febco 765 Pressure Vacuum Breaker (PVB) installed on your water supply system, you may encounter issues over time that require repair.

The Febco 765 is a popular choice for protecting against backflow in residential and commercial applications, but like any mechanical device, it can experience wear and tear.

In this article, we will guide you through the process of repairing your Febco 765 PVB.

Before we begin, it's important to note that working with water supply systems requires a basic understanding of plumbing and some tools.

Repair Febco 765 PVB

If you are not confident in your abilities, it's best to consult a professional plumber. Now, let's get started with the repair process

Turn off the water supply:

Begin by shutting off the main water supply to your property. This will prevent water from flowing through the PVB during the repair process.

Relieve pressure:

Open a faucet located downstream of the PVB to relieve any remaining pressure in the system. This step is crucial to prevent any accidents or injuries.

Disassemble the PVB:

Start by removing the bonnet and poppet assembly. These are usually held in place by screws or bolts.

Carefully inspect the poppet assembly for any signs of damage or debris that may be preventing it from functioning properly.

Clean the PVB:

If you notice any debris, sediment, or mineral buildup inside the PVB, it's essential to clean it thoroughly. Use a mild detergent and a brush to scrub away any deposits. Rinse the components with clean water to ensure they are free from any residue.

Inspect and replace damaged parts:

Check the O-rings and seals for signs of wear or damage. If necessary, replace these components with new ones from a Febco repair kit or contact the manufacturer for replacement parts. It's essential to use genuine parts to ensure the proper functioning of the PVB.

Reassemble the PVB:

Once all the components have been cleaned and inspected, carefully reassemble the PVB in the reverse order of disassembly. Make sure to tighten all screws or bolts securely but avoid over-tightening, as it may damage the PVB.

Test the PVB:

With the PVB reassembled, turn on the main water supply and check for any leaks or abnormal behavior. If everything looks good, open all faucets and let the water run for a few minutes to flush out any air or debris in the system.

Annual maintenance:

To prevent future issues, it's important to perform regular maintenance on your Febco 765 PVB.

This includes checking for leaks, inspecting the components, and cleaning any debris that may accumulate over time.

It's also recommended to have a professional plumber perform an annual backflow preventer test to ensure the PVB is functioning correctly.


In conclusion, repairing a Febco 765 PVB can be a straightforward process if you follow the steps outlined above.

However, if you're unsure or uncomfortable with performing the repair yourself, it's always best to seek the assistance of a professional plumber to avoid any potential complications.

Remember, proper maintenance and regular inspections are key to keeping your PVB in optimal condition and ensuring the safety of your water supply system.


Related Articles:

Freeze Protecting Your Pressure Vacuum Breaker

Dekorra Insulated Backflow Covers

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