Febco905211 Bonnet Repair Kit for 765 Pressure Vacuum Breakers and Backflow Preventers, 1/2 Inch and, 1/2 Inch and 3/4 Inch

If you have hard water, repairing the bonnet is simple routine maintenance every 3 or 4 years. The o rings wear out, you start to leak. You try to unscrew the bonnet and it disintegrates. The same happens with less hard water but for hard water you simply expect this as routine maintenance.Takes all of 5 minutes to do the job and everything you need is included. The warranty is nice. For me, it either works or it doesn't. I'm not chasing a warranty in the 3rd year.Good kit, all included, simple to perform the repair.

Another victim of the Florida freeze, direct replacement and works great. Easy to replace, unscrew the broken one and hand tighten the new one.

My original one leaked after ten years. The replacement parts came overnight on prime. Watched some fellows video replacing one and did what he did. Took ten minutes to complete and would have gone quicker if I opened the plastic bags with scissors instead of my teeth. Two things from the video helped. One was tighten it a nudge then loosen the other was grease and spin the new one a little to spread the grease around then tighten by hand. Also it comes with two o-rings one thicker than the other use the new one that matches your old one. You don’t have to go wild when you put the dome back on either just snug it down a little it’s only a cover and has little to do with how the thing works. Oh yeah turn off the feed valve first and open the two little drain valves and close them. When you got everything done put your face someplace other than over the dome and open the feed valve abruptly so the spring closes the thingie properly. I bought the OEM one so can’t vouch for the others. Really happy with the purchase Febco and Amazon.

Identical to the original, good quality. Perfect fit. Stopped the leak that was occurring around the gasket. Worth the money.

Perfect fit and appears durable. Time will tell.

I had one of these for many years before a freeze broke it. Then another freeze broke the replacement so I bought the other brand that was more durable. Less than 2 years and that one started leaking. Replaced rubber but to no avail. It seems that's a common problem. I popped this guy in and it works perfectly with no leaks. The moral of the story is to make sure you not only turn off the water in the riser when a freeze is coming, but also DRAIN the valve using the little nipples on the side (screwdriver slot and a plastic cap). You don't want to keep replacing these nor do you want the ice build up to split the valve body.

Don't take chances with anything other than original equipment.Watch YouTube videos on how to replace/repair. Don't get worried if water comes out of top. If it was replaced correctly it will stop in a few seconds.Easy replace/repair probably saved $200 in labor.

Easy to install and fits well. Just wish, these were made with better quality materials so they would last a little longer.