U.S. Solid Motorized Ball Valve- 1" Stainless Steel Ball Valve with Manual Function, Full Port, 9-24V AC/DC and 2 Wire Auto Return Setup

This is just what I was looking for. Open with power and default to close. The manual switch is a little tedious to operate but it is just for the situation that you need to open the valve without power. It is easy to install and no surprises. Will buy again.

I've always had a severe water hammer problem upon shutdown in my outdoor sprinkler system (3/4-inch PVC plumbing) when I am using only one zone or when the last zone shuts down when using multiple zones. The sprinkler timer controller partially eliminates this problem when using two or more zones because it turns on the next zone slightly before turning off the current zone. But it can't eliminate this problem on the last zone or when only using one zone. The water pressure in my system is only about 60 PSI. I tried a couple of so called "slow closing" solenoid valves that really did not live up to their claim and my water hammer persisted. The problem is that these "solenoid valves" just stop all of that water from flowing in milliseconds, not gradually like in a manual shutoff. But a motorized ball valve on the other hand is just like a manual shut off valve. It takes a few seconds and gradually shuts down the water flow preventing any water hammer. I have read some reviews however that have stated motorized ball valves can get stuck open or partially open so keep that in mind as to where and how to install this valve, so you don't have a possible single point failure that could keep water running in your system. If you're paranoid about this, you can do like I did and install it in series with your current solenoid valve so that it would take two failures (both the solenoid valve and the motorized ball valve) for this to happen. But it will take some electrical know how and an additional auxiliary timer and relays to do this. Anyway, I've had this valve installed for about 2 1/2 months now and so far, it has worked flawlessly. Five stars for sure.

I have this valve mounted on the out port of my big stand up air compressor. I have a good sized shop with multiple air drops. I have used 1/2" schedule 40 PVC pipe for years and have never had a problem but I would worry that if a line should break at night the compressor would run forever. For this reason I used a 220 volt relay connected to a wall switch timer to prevent compressor turning on at night. You always have a small air leak at fittings (especially quick disconnects) and my compressor would cycle on and off with no one using air. However when I needed air, the lines would be dead and compressor tank nearly empty and you would have to wait for air build up.NOW WITH THIS AMAZING VALVE, I use the same wall timer switch to control a low voltage transformer that triggers valve to open. The valve closes automatically when power is dropped so I can push 1 hour on timer for example and walk away knowing that after I'm finished using air the valve will be closed and I know the compressor won't be running unnecessarily. Now, my lines may be dead but the compressor tank is full and ready and with a press of a button the valve opens and now all lines are charged instantly. What I especially like is it opens slowly and you don't get a hard pop of air on the lines. Highly recommend this valve.

Only used it during the "summer" months for irrigation. Went to use this year and it's frozen solid. Suspect water intrusion through the manual control knob as mentioned by other purchasers. Worked great the year that it worked. Only other issue was the open/close indicator faded away after a couple months of usage but that didn't affect its operation. Expensive valve to have to replace after one season of use.

I use this type of valve on my geothermal heating and cooling system. I run 55° well water through it to supply the heat exchanger in my system. It lasts 14-15 months of steady use. Which is about how long a brand name one lasted me at about 1/3 the cost. Thank you Amazon!

I added this motorized valve as a master shut off valve to my sprinkler system. Running my sprinklers on well water, rust particulate contamination in the water makes the zone valves become erratic periodically. This solves a problem of leakage while the system is off by positively shutting off the water going out to the sprinklers. This valve is ingenious. It uses a 24 V master pump start signal to energize the valve motor and open the valve. I thought it was a spring return. But instead, it charges a capacitor and uses that to close the valve when the 24 volt signal ends, according to the literature. This makes it very easy to install, and the stainless steel and Teflon parts will give it a long life for me.

works great and did the job i bought it for

We are very pleased with the valve. You can tell it is a quality-made product, and the setup was very straightforward. We used it to replace our garage hose bib so we could enclose our retractable hose reel and operate it with a switch (and yes, we also included the necessary backflow prevention valve). Since purchasing it, we have utilized it multiple times daily, and it continues to perform flawlessly.