John Guest PPSV041212WP Plastic Push Shut Off Valve, 3/8 in. Tube OD, White

Just like all Speedfit John Guest products, this valve attaches quickly and easily to John Guest tubing. The connection is leakproof as always with John Guest fittings. This is used with water pressure of 80 psi, but it is rated for much higher pressures for cold water. The valve is easy to turn and has performed normally over the last eight months, with no leak. We turn the valve back and forth about once a week. If needed, John Guest fittings can be disconnected from tubing using an inexpensive removal tool. There are optional plastic locking collets that can be added to John Guest Speedfit connectors to prevent inadvertent disconnection, but these are rarely used as an accidental disconnect is exceedingly uncommon. By the way, these are made of polypropylene and are NSF61 listed, so they may be used in a food service application with other food safe materials. Ideally, use these with John Guest LLDPE 3/8" tubing to be certain of food safety and excellent fit. I don't recommend using alternative branded (or unbranded) equivalents as you have no assurance of NSF listing and food safety.

Working great for 6 months, no signs of leaking. The knob remains smooth to turn. I would certainly buy again.

They work as advertised and don't leak. Used them to connect a Reverse Osmosis water purifier up, so that I can switch between the RO system direct output and a deionizing filter after the RO system.

What can I say about John Guest fittings? They are wonderful! I hope John is rich, because his fittings are super easy to use, I've never had one leak, they aren't expensive (like some "other" brands of push-on fittings), and they are available pretty much everywhere.

TLDR: 🌟🌟🌟🌟🌟 Effortlessly installed a shut-off valve for my fridge's water supply, saving time and money without needing a plumber. I recently faced the challenge of moving my fridge, but the lack of a shut-off valve for the copper water tubing meant potentially turning off the house's water supply, which wasn't an option. To tackle this, I armed myself with a pipe cutter, a handy gadget, and a hopeful spirit. The installation process turned out to be surprisingly simple. The first end of the gadget connected with a reassuring "pop," signaling a secure fit. The other end was a bit more stubborn, not clicking into place right away. Sensing something amiss, I applied pressure to both ends simultaneously, and sure enough, the second "pop" confirmed a successful connection. When I turned the house's water back on and switched the new valve to the 'on' position, water flowed smoothly with no signs of leakage. The feeling of triumph was immense! This quick, five-minute fix cost just a fraction of what hiring a plumber would have, with the toughest part being just moving the fridge. This DIY solution proved to be a highly effective, quick, and cost-efficient way to add a necessary shut-off valve, enhancing the practicality of my kitchen setup.

The real deal. Best valve made for push-fit tubing. I just wish they came in more reasonably-priced multipacks. These things add up in cost quickly. You can get brass quarter-turn valves for the same price. Weird. But still, when I want a 7/24 pressurized water line, I sleep better buying these over the knock-offs.

Very easy to use product of great quality. Tight connection with no leaks

If you need to go from Copper to plastic tubing, this is the one.