SUNGATOR 2-Pack Hose Bib Backflow Preventer, 3/4 Inch GHT Vacuum Breakers Outside Faucet, Hose Bib Anti-Siphon Valve for Outdoor Faucet, Brass 3/4'' Garden Hose Bib Anti-Backflow Preventer

This comes in a very well thought out kit with added hose washers and Teflon tape. I put these on a freeze proof faucets with 100 psi pressure and they work very well. Use tip, when you turn the water off, holes around the diameter of the device open to bleed the pressure off. If you have a nozzle or other device causing back pressure you WILL get wet. When you turn the water off, it is best to insure your nozzle is wide open to help bleed the pressure off the hose and place your hand over the fitting on the faucet to deflect the water away from your pants.

Seems to work fine. Somehow I didn't realize that these came with sealing tape and extra washers. A good price for two items. I was replacing an old back flow limiter that was defective. My first time to do this. A bit of advice for anyone else doing this for the first time: 1. I discovered that the old one was locked on with a setscrew. I had to carefully drill this out to remove it. 2. These new ones also have a setscrew. You are expected to tighten it on until the head of the screw breaks off. I chose to not do that, in case I needed to remove it later. But, again, I am pleased with what I received.

Solid product lots of extra washers installed easily.

Looks like high-quality it has the set screw and it has accessories to help you make sure the snug fit

The water was spraying out when I turned on the hose. I replaced what I had with this connector. No more spraying and leaking when it's operating or when I turn off the water. The product came with six, including tape and rubber seals, in a handy plastic container. Quick fix. I'm pleased.

Works well.

FINAL UPDATE 3/15/2024: Shortly after updating my last review, the seller offered a refund for (1) set of the vacuum breakers. I think this is great customer support. I'm not adjusting the review rating, b/c I believe this is a reflection of product quality; however, I do want to commend the seller's customer support. I think you can buy with some confidence more than alternatives knowing this seller would be willing to provide compensation in case of failure. 5-star to 3-star update: Purchased my first set (2) years ago. I liked them so much I purchased (4) more over the past year. 2/6 have started failing - leaking out of the small "ejection" ports. I've been unable to stop the leaking - new o-rings, tightening, loosening, and putting on a different hose bib haven't worked. I also have noticed the (2) failing breakers ALSO make a high-pitched noise (mostly heard inside the house) when in-use. When not in-use I turn my hosebib off (i.e. there's not constant pressure against the breaker).

Excelente producto es útil para lo que se lo usa