Febco 765 Sprinkler Backflow Repair 

Thank you John. Great, simple presentation. Important, but small, point you made regarding reintroducing water after making the repair. I had completed the repair (which I don't think I needed in retrospect), and after opening the supply valve I still had water leaking from the top of the back flow preventer. Your mention of the need for fairly abrupt water pressure to pressurize and seat the springs inside solved my problem. Per another posters' suggestion to reintroduce water pressure slowly when starting an irrigation system in the spring, to avoid a strong water hammer situation and potential damage to other system parts, I had not been turning the supply on quickly enough to pressurize and set the springs inside. Bottom line, opening it quickly did the trick. Thank you again for your helpful video.

I only replaced the o-ring (washer) on the bonnet. Easy 99 cent fix because I got the new o-ring from a mom and pop hardware store. Thanks for the video though, it helped me understand the backflow device.

Yes! Don't forget to abruptly turn on the valve to push the spring into place. If you don't it will leak and make you think it needs replacing. However, they do just need replacing sometimes.

Your presentation was excellent. You talked at a medium speed and you voice was clear.

Only other thing that may happen is when you turn it on it briefly may purge water until it is pressurized and does not mean it is installed wrong it will seal.

Great video! Thanks. My sprinkler service recently blew out my lines and took the parts! I can’t believe it.

Thank You ...You are a master of communication as you explained every detail including the content of the package. One question- is the nut in the package for the canopy? Thanks again...

Thank you I did what to recommend buy the febco Original and worked beautifully easy explanation and got it fixed

Thanks for the great vid! This was on point, high-quality, professional video. I'm impressed! Thanks again from Houston.

Thank you. You just saved me $150

GREAT video. REALLY helped us to fix our sprinklers. THANK YOU!! :D :D :D :D :D

Thanks John, you saved me money! 👍

Thanks

I broke the bolt by over tightening the bonnet bell cap. I drilled 2 wholes in the cap and threaded string through the holes to get it to stay put, but I saw that the cap should be loose, which it is not with my DIY repair. Does the bell cap really need to be loose?

Good instructions. So how do you know if you have a one inch or three-quarter inch Febco 765-1?

awesome!

Great video.. much appreciated! It looks almost like changing a faucet cartridge and I can do that! Haha Cheers!

Ok, I did it. I followed your directions to a T (thin washer, added the grease, seated backwards till it felt flushed, then tightened it, added cap, and open the system abruptly). The system didn't leak after I swapped the large gasket with the smaller one. Is there another way to find out which gasket size actually belongs to my system? I'm not the original owner?

Both handles to turn off the water flow on mine are in the back instead of the front. Is that uncommon? I don't know why that is. The sprinkler system was installed already when I bought the house. Every DIY video I've seen, they are in the front.

I have replaced all the inner parts and it is still not working, any ideas?

Actually the parts are the same price as a whole new febco PVB! frustrating- also, I tried to save money and bought an aftermarket set and it lasted only 1 month.

Hi John, Great info. I am having unit tested for city ordinance. Had a freeze repair and blowout last fall. Should check valve be replaced before having unit tested?

I replaced the Bonnet/Poppet and it worked fine for about 3 weeks. Then it started leaking again. I found the gasket bulged out to the side (I used the large one). I just tried using the smaller gasket but the system continues to leak with the smaller. I'm planning on returning the item to Lowes and getting a new one. But any ideas on why the system failed so quickly?

Hey John, my Febco test cock is leaking slightly. I don't see replacement parts around CR. Any easy way to just repair this? It's just a drip about every 10 seconds. Thanks John, love the videos!

John, After I replaced those pieces I turned the valve on & right below below on the “neck” of the “brass piece”, water squirted out & it appears there’s a super duper small crack or hole in the brass piece, it’s only squirting out when I turn the water valve right there on & once pressurized it is barely leaking out of the “T” where you screwed the plastic into,, it’s right below that. Do I have to buy another poppet kit or does that brass “T” come with it? I just replaced that yesterday. Any help would be grateful.

Hi John. Thank-you for the excellent video. I replaced the Febco 765-BP bonnet and poppet. I turned the valve back to the open position and it sealed perfectly...for about a minute or two. Then I heard a hissing noise and a fine spray appeared. I shut the valve, removed the bonnet and poppet to inspect the o-rings. No crimps and they were both correctly positioned and lubricated. Re-installed and same result only in a different location around the seal. Tried a third time. This time it doesn't spray but there is a very slight drip. Any suggestions? Thanks.

What would cause this to happen on a brand new poppet and bonnet? I'm trying to get this going for the first time at this residence. I'm in your neck of the woods so you know how bad the grass burns if not watered. Trying to get this going before my front and back lawns turn into the dust bowl.

I have replaced the inside parts and it worked for a bit but now it's leaking again up through the bell and I am not sure why. All the inner parts are new! Help please?

The nut loosens but won’t come off it just spins? Help! I have the part🙏

Where can I find a cap (umbrella on the very top of system)? I misplaced mine.

Weak spring causes check to fail

Asse stopped issuing you hacks backflow rebuilder certificates, don't touch them anymore.

AHHHHH, 1st thing to do is MAKE SURE THE WATER IS OFF OR THE BALL VALVE BEFORE THE BACK FLOW PREVENTER IS OFF.