John Guest JG Speedfit PPSV501222WP 3/8-Inch by 1/4-Inch NPFT Female Elbow Shut Off Valve

This valve is works great. Very solid feel tuning on and off. No leaks. 😁

I picked up a little shut-off valve and it’s been working pretty well for my water line project. It was easy to pop into place thanks to the push-connect design, which made things much faster than I expected. The only thing I found was that the plastic material feels a bit lighter than I thought, so I worry a little about long-term durability. Still, it’s done the job and I’d say it was a good buy.

Worked well and didn't leak

Excelente reemplazo de calidad, funciona muy bien sin problema alguno de instalación, robusta y segura mejor no se puede encontrar

It took me a couple orders before I found this one. There are multiple types and sizes of these. The output is 3/8 here, which is the thicker RO tubing. Some of these valves are only 1/4 output, which fit the thin tubes, so best to check the type of tubes in use on your system here. The other end, the end that fits onto the RO tank-- NPTF is the twist on type. They make multiple sizes of this and despite thinking I needed 3/8 on the bottom, 1/4 NPTF seems to be the more common RO sizing. Use a little plumbers tape on the twist on to ensure a smooth/leak free connection. Screw on by hand as tight as you can possibly get it to go. No leaks yet on two of these. The valve does its job. The price on this is a bit steep for what should be a $3 part, but it works perfect and is the only one out there it seems.