HYDRO MASTER Vacuum Breaker Valve,Hose Bib Backflow Preventer, 3/4 Inch, Brass Finish

All of these vacuum breakers look completely identical aside from the stampings and I'm guessing they all work the same, so why pay more for one? This HYDRO MASTER appears to be solid brass and it works as intended, so it's a good value for the price I paid at the time of this review. I highly recommend installing this without the snap-off set screw (does this by design) or you will find yourself in my boat of having to replace the faucet because the breaker can't be removed when it fails, and it will eventually fail. I understand the need for these vacuum breakers to prevent potentially contaminated water from backflowing into the drinking water of one's house, but the snap-off set screw is just idiotic. If they are going to do that, then they should just make faucets with vacuum breakers as a one-piece design. Trust me, it will work just fine without the set screw, and you will thank me down the road when you don't have to spend extra money to replace a perfectly working faucet when the breaker breaks and starts spewing water everywhere. Just keep the set screw in a safe place in case you need to install it for an inspection if you are selling your house.

great product, will buy again

This product is very well made and easily installed and works as it is supposed to. My only problem with the unit is the set screw twisted right off. So be careful when you lock the screw down and don't apply too much pressure (torque) or you will twist the screw right off.

This is a must for all exterior faucets. It prevents water from entering your system. I installed it , super easy and it works perfectly. I removed the set screw for future replacement as needed otherwise you have to cut it off if/when this device fails.

I used this for my fresh water feed to my Motorcoach to keep pressure in my water lines. The only thing I dint like about it is that it's noisy when the water is shut off. You can hear it vibtate.

These are inexpensive and protect your home from a potential backflow situation. Most people and some plumbers believe it’s not needed but they are wrong. My advice if you do not have one in your hose spigot put one on. Just make sure to remove the little wet screw on the side, that you do not need. These screws when tighten snap off making removal of the valve very difficult to impossible later in.

This thing is way too noisy and loud. I purchased 3 of these and installed for garden hose, Oto lawn watering system, and faucet in the garage.The noise wakes everyone up in the middle of the night when lawn watering happens or watering backyard garden during the day.I removed all three and tossed in the trash.

It's hard to tell whether or not it's working because I have no real way of knowing whether it's doing its job or not. My big complaint is that it is loud apparently it vibrates. I think all my neighbors hear it whenever I'm watering. I have tried adjusting it but so far I have been unsuccessful in making the quiet down and still pretty loud. I bought other anti-siphons they have been working fine without insulin so I do not intend to buy this brand again.