HunterSprinkler HC50F50M HCV 1/2-Inch Female Inlet by 1/2-Inch Male Outlet Check Valve

I installed this just beneath my lowest sprinkler and, at first, the leak remained just as bad. So I took the sprinkler and check valve out, and flushed the line. With the line clear of dirt, I rinsed out the inside of the check valve (it turned out there was indeed dirt preventing the valve from closing) then reinstalled it, being mindful not to introduce any new mud into the line. It works perfectly now. It no longer leaks after the water is shut off. Good product, just be careful to flush your irrigation line beforehand.

It fix my head sprinkler leaking. If you have a head sprinkler keep leaking you need to buy this one.

First installation still had leak. Says it comes preadjusted for 12'. My slope is only 5' figured would install as is, it didn't stop water flow. Left check valve in place, removed sprinkler, used screwdriver to adjust until water stopped. Would HIGHLY RECOMMEND installing valve and check/adjust as needed BEFORE putting sprinkler on

Very easy installation and adjustment. Not sure if it is adjusted the way it stated in the specs initially, but an easy adjustment fixes that in seconds.

I had two sprinkler heads at the bottom of a hill. The heads had check valves built into them however the slope of the hill was so great that they still leaked badly. So much that my pump would not hold its prime. Had two different irrigation companies look at why my pump wouldn’t hold prime and after over $800.00 of them repairing my system without even considering the leaking heads at the bottom of the hill, my system still wouldn’t hold prime. They wanted to dig up the well as they assured me that was the problem, I told them to just leave. I purchased these check valves and put one under each of the leaking sprinkler heads. Each one only took me about 10 minutes to install. The heads no longer leak at all and the system holds prime even if I have it shut down for weeks. Wish I would have tried these before I called in the so called professionals. These fixed the problem and the entire system now works as designed.

wasn't sure this would work, but it worked perfectly. Before a 1/2 hr steady drain out of the head (10' below other heads), but after install, not a drop of water came out when the zone shut off. Really happy.

Did not work on my sprinklers

Easy to install and stopped the water in the irritation pipe running out of the head