Febco 765 1 inch PVB Backflow Preventer
- Febco 765 FE765-100 Backflow Preventer
- Female Pipe Thread
- 1 inch
FEBCO® Series 765 Pressure Vacuum Breakers are designed to be installed to provide protection against back siphonage of toxic or non-toxic liquids. They feature a durable bronze body and a check valve and air opening port in one assembly.
Features & Benefits
- All bronze body for durability. One check valve and an air opening port in one assembly.
- Lightweight poppet seals air opening under minimum flow conditions.
- Simple service procedures. All internal parts serviceable in line from the top of the unit.
- Designed for minimum head loss.
- Engineered plastic bonnet protect valve bodies from freeze damage.
- End Connections - NPT ANSI/ASME B1.20.1
- Maximum Working Pressure: 150 PSI.
Pressure Vacuum Breaker assemblies shall be in stalled to withstand pressure for long periods and to prevent backflow of contaminated water into the potable water system in backsiphonage conditions. The Pressure Vacuum Breaker assembly shall consist of a single spring loaded check valve which closes tightly when water flow through the assembly drops to zero, and a single air relief valve that opens to break the siphon when pressure drops to 1 PSI.
The assembly shall include two resilient seated shut-offs and two resilient seated test cocks, considered integral to the assembly. Assemblies must be factory backflow tested. The check valve and air inlet valve must be constructed to allow in-line servicing of the assembly. The valve body shall be constructed of bronze. The check, poppet and bonnet assembly shall be constructed of engineered plastic to protect the valve body from freeze damage. Pressure Vacuum Breaker assemblies shall be installed a minimum of 12" (300mm) above the highest downstream outlet, and the highest point in the downstream piping.
The assembly shall be rated to 150 PSI working pressure and water temperature from 32 degrees F to 140 degrees F. The assembly shall meet the specifications of the USC - FCCC & HR Manual. Pressure Vacuum Breaker assemblies shall be FEBCO® Series 765 or prior approved equal.
- Main Valve Body: Bronze
- Elastomers: Nitrile
Irrigation systems supplied by domestic or private potable water systems are considered to be a potential pollution hazard to the water supply. These systems must include protection to prevent possible backflow of irrigation water into the potable water supply.
Federal law requires a proper backflow device to be installed on any watering system to prevent contamination of the supply; whether it be pump or city water. Check your local water authority for installation requirements & codes. In many rural areas; specific requirements for landscape irrigation systems may not be covered in local plumbing codes and/or enforcement may be limited. HOWEVER...limitation in local authority does not alter the basic requirement for protection of the potable water supply.
Related Articles & Videos
- How to Replace A Bonnet and Poppet
- Types of Backflow Preventers
- Atmospheric Vacuum Breaker (AVB)
- Pressure Vacuum Breaker (PVB)
- Double Check Valve Assembly (DCVA)
- How To Winterizing Your Sprinkler System
*Red indicates repair parts sold at the Sprinkler Warehouse
over 2 years ago
1 year ago
Had to make a small field adjustment to get the valve handles to face the correct direction for my setup.
1 year ago
over 2 years ago
Yes. I have it connected to pvc on both ends. works fine.
By Kansas law, it is to be installed outside. And in Kansas, Double check Valves can be installed inside or in a underground box.
Can I buy just that?
I had a wasp that got in there once. Check the seal that there is no tear or other issues. Put it back together and recharge the system.if it continues to leak then replace the seal.
You didn't do anything wrong, same happened to me after I installed it. I'm a plumber so even I was was a little surprised when water was seaping out after turing the water back on from under the bell top.
What happened was ,, normally after any water pipe work the normal approach is to turn the water pressure back on slowly but, with this valve when the water is put back on slowly the pressure stop located within the valve under the "bell top" doesn't have enough pressure to close so water come flowing out.
What I did was just turn the water back on (ball valve on backflow) quickly creating quick full pressure and that allowd the pressure valve to close under the bell top and all was good.
Just check for any other leaks from install & you should be ok.
Actually I don't believe you use a bushing with this - at least I didn't use one with my assembly. I needed to solider 1" copper pipe in both the inflow (coming from the house) and outflow (going to the sprinkler valves).
They may have a new model that uses bushings - I don't know.
Also note - getting a proper seal on the inflow side was difficult since I had gravity working against me. I needed to remove the copper pipe and re-solider this end 3 times before I had a good seal the wouldn't leak....
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