“I'm using this valve in a closed hydronic heating system with treated water. The first valve lasted from October, 2010 to sometime during the 2013-14 heating season. The second valve lasted until this fall (November, 2016) when I discovered the same problem—right at the mixing zone outlet area where the bronze casting meets the Teflon coating, the bronze appears to be eroded away so that hot water leaks past the seat, leaving the mix temp way too high. Unfortunately, my setup is tight and changing to a different model/manufacturer would be problematic. Great when it's working...”
“I ordered an expansion tank & a mixing valve kit, but I ended up returning the mixing valve and replacing it with just the missing valve. I received the merchandise in no time, better than what I expected. When I called to request an MRA for the mixing valve kit, I was taken care of immediately. They emailed me the shipping label (I paid for the return) when I was still on the phone with customer service, and placing the order for just the mixing valve. EXCELLENT SERVICE!”
“The directions say loosen the screw then pull on the adjustment knob and turn it to adjust water temp. Should also say how far to loosen the screw. I found out it has to be loosened up almost all the way. Which is over a half inch.”
“Installation easy. However, out of the 100 or so threaded fittings in the system I just put in, all 3 of the female threads on the unions leaked/blew out the PTFE paste. Being an engineer, I used calipers on the minor diameter of the threads, and they were .015 larger than spec for NPT. In other words, they may have cut the threads with a worn tap. I finally got them to seal with 4 wraps of thread tape AND Rectorseal paste. Otherwise, the valve works fine I would recommend, but beware”
