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Febco PVB Bonnet/Poppet Kit 1 in. - 1-1/4 in. | FE905-212

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Febco PVB Bonnet/Poppet Kit 1 in. - 1-1/4 in.

The Febco FE905-212 is the replacement bonnet and poppet kit for Febco 1 - 1-1/4 inch pressure vacuum breaker assemblies.

  • Febco Bonnet & Poppet Kit 
  • Fits a 1 inch to 1.25 inch Febco Pressure Vacuum Breaker
  • Compatible with FE765-100

Features & Benefits

FEBCO is so confident of the heavy-duty construction and "freeze plug" design of the Series 765, it is the only manufacturer to offer a lifetime warranty on the bronze valve body of the 1⁄2" through 11⁄4" models*. In most pressure vacuum breaker designs, the bronze body can split open when water inside expands in freezing temperatures. When this happens, the whole unit must be replaced which can be expensive and downright inconvenient. But should an unexpected freeze catch your irrigation system.

Series 765 Pressure Vacuum Breaker Features: Only FEBCO offers a Lifetime Warranty on the bronze body of the 1⁄2" through 11⁄4" Series 765.

The exclusive "freeze plug" design feature of the 1⁄2" through 11⁄4" models prevents freeze damage to the bronze body and limits damage to less expensive internal components. Unique check valve design reduces check valve fouling and chattering providing longer life and more reliable operation.

Vandal/tamper resistant brass canopy and test cocks mean trouble-free performance. Engineered plastic and brass internal parts resist chemical and mineral deposit build-up for more reliable performance. Heavy duty engineered plastic poppets provide reliable operation.

Product Details

Here are Two Ways to Determine the Size Kit You Need:

  1. Measure across the bottom of the Poppet (item 12 in picture above); the distance across the bottom of the Poppet will determine which size kit you need:
    • 1/2" & 3/4" Kits: Poppet measures 1- 1/8" to 1- 3/16" across the bottom (diameter).
    • 1" & 1-1/4" Kits: Poppet measures 1- 7/8" across the bottom (diameter).
    • 1-1/2" & 2" Kits: Poppet measures 3- 7/16" across the bottom (diameter).
  2. Measure across the bottom of the Bonnet Assembly; the distance across the bottom of the Bonnet Assembly (threaded part) will determine which size kit you need:
    • 1/2" & 3/4" Kits: Bonnet Assembly measures 1- 5/16" across the bottom (diameter).
    • 1" & 1-1/4" Kits: Bonnet Assembly measures 2- 3/16" across the bottom (diameter).
    • 1-1/2" & 2" Kits: Bonnet Assembly is made of brass and measures 5- 1/8" across the bottom (diameter).
Symptom Cause Solution
1. Check valve fails to hold 1.0 PSID minimum

A. Debris on sealing surface or guide surfaces valve surfaces

B. Damage seat disc

C. Weak or broken spring

D. Poppet broken due to thermal expansion

A. Disassemble and clean check

B. Disassemble and replace seal

C. Disassemble and replace spring

D. Replace broken poppet



2. Poppet fails to open at 1.0 PSIG minimum

A. Debris restricting free operation

B. Poppet seal adhering to bonnet

C. Weak spring load

A. Disassemble and clean check valve surfaces

B. Disassemble and clean and/or replace damaged parts

C. Replace bonnet assembly (1/2 - 11/4)
Replace spring (11/2 and larger)

3. Minor leakage through air vent

A. Damaged poppet seal

B. Cracked or damaged poppet

C. Cracked bonnet or damaged sealing edge

D. Debris on sealing surface

A. Disassemble and replace seal

B. Disassemble and replace poppet seal

C. Disassemble and replace bonnet assembly

D. Disassemble and clean

4. Significant discharge through air vent

A. Poppet not properly guided

B. Major poppet or seal failure

C. Low downstream pressure

D. Insufficient inlet volume to operate device

E. Poppet and or bonnet broken

A. Disassemble and replace damaged parts

B. Disassemble and replace damaged parts

C. Check pressure at #2 testcock; should be higher than 5 PSIG if low system

D. Pressure needs to be increased or partially closed outlet ball valve to create higher pressure on poppet.

E. Replace broken bonnet/poppet due to thermal expansion (see freeze protection)

5. Chatter during flow conditions

A. Worn, damaged or defective check valve guide

A. Disassemble and repair or replace guide

*Red indicates repair parts sold at the Sprinkler Warehouse

How to Replace the Bonnet and Poppet (you should always change both):

  1. Turn off the water supply (Warning: Failure to Assure the Water Pressure is Relieved can cause Harm!)
  2. Close water supply side ball valve first
  3. Go to the sprinkler controller and manually start each zone or section valve by manually starting the sprinkler system. This will relieve the water pressure in the PVB. Then turn off the manual operation of the sprinkler system.
  4. Close second ball valve (on outlet side of PVB)
  5. Make sure that you have relieved water pressure by opening test cocks on side of PVB
  6. Place large O-Ring (included in kit) around Bonnet
  7. Apply lubricant (included in kit) to gasket
  8. Fit (slide it onto) Poppet on brass guide stem of Bonnet
  9. Thread Bonnet into PVB unit (hand tight only)
  10. Replace Canopy and tighten nut on top of canopy using a wrench
  11. Turn on the water supply
  12. Open water supply side ball valve first and rapidly
  13. Open second ball valve

90% of the Pressure Vacuum Breakers (PVB) installed for a typical residential home are 1" PVB's

Kit 905-211: includes the Bonnet and Poppet Assemblies for both 1/2" and 3/4" Pressure Vacuum Breakers

905-212: includes the Bonnet and Poppet Assemblies for both 1" and 1 1/4" Pressure Vacuum Breakers

Repair Parts For A Febco 765 1 or 1 1/4 in. Backflow Preventer Including The Bonnet And Poppet

Everything Needed To Repair a Febco 765 At Sprinkler Warehouse

The FE905-212 Febco Repair Kit includes a rubber O-ring, spring, E-ring, washer, stem, bonnet, and poppet. All parts are genuine and original to the valve. Requiring no special tools for the repair and installation process, this kit is a real lifesaver for your pocketbook and bank. Quickly fix water spillage and waste with this wonderful product from Sprinkler Warehouse.

5 Features Of The Repair Kit:

  1. All parts are made of high-quality materials
  2. Factory replacement parts
  3. No special tools required for servicing
  4. Fits 1 and 1 1/4 inch pressure vacuum breaker
  5. Operable from 33°F to 140°F

How To Repair A Broken 765 Backflow With New Bonnet And Poppet Installation

Pressure Vacuum Breakers are notorious for breaking under freezing weather conditions. Fortunately, 765s are made with a durable bronze body for extra freeze resistance and the bonnet and poppet come with unique freeze-plug technology for the best freeze protection available. In order to repair a broken 765 simply drain the body, remove the broken interior pieces, and then replace the removed parts with the items in this kit.

Pressure Vacuum Breaker Repair Parts And Accessories For Sale

Outside of the durable bronze body of a 765 PVB, Febco offers unique and original product replacements for the interior components of the 765. The lightweight poppet seals the air in minimal flow scenarios, and all internal parts are serviceable from the top of the unit. The repair kits are easy to use, requiring no special tools, and comes with directions.

Repair PVBs Quickly For Quick Protection Against Contaminated Water

PVBs like the 765 are important for backflow prevention, as they protect potable water from contaminants that may be present in the irrigation system's internal water. This could lead to illness or possibly, in extreme cases, death. PVBs will leak water from the top if they are not working, so it's easy to identify and fix the problem. Buy your repair kit now at Sprinkler Warehouse.

Frequently Asked Questions

How do you fix a 765 1 in. PVB?

Turn off the water supply first. Next, turn off the inlet ball valve and open the test cocks. Then close the outlet ball valve. Remove the interior pieces from the 765, then place the O-Ring around the bonnet. Fitt the poppet into the bonnet, and thread the bonnet into the PVB. Make sure to hand tighten only! Replace the brass canopy and tighten the nut on top with a wrench. Turn on the water supply, and open the inlet valve first, then the outlet valve.

What size is my PVB backflow device?

The base of the poppet can be measured to determine what size your PVB is. If your poppet measures between 1 1/8" and 1 3/16", then you have either a 3/4 or 1/2 inch PVB. If your poppet measures 1 7/8" across the bottom then it's a 1 or 1 1/4 inch PVB. And if you have one that measures 3 7/16" or over then you have a 1 1/2 inch or larger PVB.

What does a backflow preventer look like?

A pressure vacuum breaker backflow looks like a right-angle piece of bronze or other metal with a bell/canopy on top of the right angle. There are often two valves, one on each side of the joint in the device. The backflow is designed to prevent backsiphonage with minimum head loss.

More Information
Brand Febco
Series Febco PVB Bonnet/Poppet Kit
Backflow Compatability Febco PVB Repair
Warranty 1 Year
Size 1 in. - 1-1/4 in.
Type PVB Repair Kit
Guide (3.04 MB)
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