Review on Apollo Conbraco Devices 4V 500 03 4V50003 by David Naranjo

Perfect fit for 17 year old check valve in my irrigation system. The old one was leaking and the rubber O-rings were a non-standard size. All I had to do was replace the old metal cap (after I sanded, primed and painted it) and screwed it in. The new valve only had to be tightened by hand to prevent leaks. I lubricated the O-rings with water-repellent grease to make them last longer. This is much easier than soldering in a whole new valve.