John Guest Speedfit 3/8 x 3/8 x 1/4 Inch Angle Stop Adapter Valve, Push to Connect Plastic Plumbing Fitting, ASVPP1LF

I had bought an ro filter counter top version few months back. I moved to a new house which had an expensive moen pull down faucet on which the filter failed to fit. I tried all possible solutions of finding different adapters which help to fit this filter to the faucet. However all attempts failed. Called the customer service and they gave a solution to replace the ro filter with under sink model or replace the faucet. I did not want to do that as it would costed more than 500 dollars. Finally I found this attachment which helped me fixed the ro filter from the under sink by pulling an extra pipe out for ro filter. I am so happy I found it and it saved lot of money.Its a nicely built product of great quality.Glad such products exists

Much better than what was provided by whirlpool. Allowed me to split the cold water connection to the RO system and ability to shut it off during filter exchanges etc.

I used this on a bathroom sink to connect our Aqua Purr cat water fountain. The push on quarter inch connector was easy to use, and I dislike plumbing. I like the added shutoff valve in case something goes wrong. Would definitely recommend

Easy to use for feeding under sink reverse osmosis systems. Have never had one leak or fail

in line adapter for water filer or ice maker. perfect fit for residential applications and easy to install

This was exactly what I needed.

Thank you for selling this part! I was trying to install a under sink water filter and it came with 1/2 by 1/2 x 1/4 adapter, didnt work with my 3/8 fittings at all! I kept getting leaks. This solved every leak problem and made installation so simple. Best buy ever!

Good quality fitting, as usual with JG speedfit fittings. I used this to tap into my under-sink coldwater line to install a RO/DI system on my pex line. This will easily work on PEX and braided hose line, right after the cold water shut off valve going to your faucet. Far better quality than the cheap plastic pieces most home RO systems come with to tap into the cold water.

Perfect!! Buy this! I was looking for right connetor something does not leak at all and this is it! I bought METPURE brand connector first but water was keep leaking so I returned and tried this one and i am happy about the result! It has a rubber band inside of the connector so water does not leak at all if you tightened well.

My first valve leaked and contacted the seller. They replaced it for free with shipping included and the new valve works perfect and is a 5 min install. I would buy again.