Watts Brass & Tubular #9D-M3 1/2 1/2" Backflow Preventer

Worked like a charm and is a solid device. Tested it because I live a boring life and have nothing g else to do with my time. Plus. I did not want putrid hot water back flowing into my potable drinking water. Worked like a charm. Pay the premium - its worth it.

Easy to install. Did it's job 👍. Ty

One of the few times the cheaper offering was what I needed. This back flow valve is one of four devices (other three are pressure valves) connected to one drain line on my boiler. Line was leaking badly and was the third thing I replaced that stopped the leaking. Encourage checking for an exact replacement for what you need. I soaked the fittings on the valve with WD-40 and it seemed to help when it was time to remove the old one. Also this particular valve came with a warning that its lead content was more than is recommended to connect to a potable water line - maybe the reason it is cheaper?

It worked perfectly and I am a happy customer. Delivery was right on time. Thanks

Nice product for a backflow preventer and well made. But ridiculously expensive at > $60 delivered. If time weren’t an issue I’d buy the same for $34 and wait 10 days.

The BFP was easy to install as I was replacing a defect BFP that was already in place. I only had to disconnect the old valve at the unions, leave the old unions attached to the copper pipes and simply replace the valve body using the new seals. I was quite happy that I was able to get this BFP from Amazon because I had a couple of local supply houses refuse to sell me this valve because I wasn't a plumbing contractor - THEIR LOSS IS AMAZON'S GAIN.

The pressure adjustment is ridiculously sensitive and wanders. My boiler requires 15 psi to operate and I try to keep it around 17, but the slightest, I mean almost unnoticeable tick of a turn, will adjust it 7-8 lbs. It takes an hour to finally settle, which means another tic either way, another hour to settle. Then you finally get it where you want it, and a few days later the pressure is either too high or too low. Replacing this piece of junk with a different brand.

My old backflow preventer on my oil furnace was very corroded and began to leak out of the Drain pipe. Bought this as a direct replacement and had no problems removing the old component. Just use two plumbers wrenches and rotate the nuts in opposing directions on each wrench for more leverage to break the old ones apart. Taped up the threads with teflon tape and put some pipe dope for good measure. Replaced and leak free in under 30 minutes. Will order again when the new one starts to leak/get clogged up.

As advertised