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Thread: Best way to connect 1/2" PEX to 1/4" copper

  1. #1
    DIY Junior Member schloske's Avatar
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    Default Best way to connect 1/2" PEX to 1/4" copper

    I am attempting to hook-up a water line from our water filter to a refrigerator. The refrigerator already has a 1/4" copper line connected to the refrigerator that runs about half way to the water filter. The water filter has a 1/2" PEX output (currently to a sink water dispenser). I need to add a tee to that line, then run PEX to connect to the copper. At some point I have to reduce from 1/2 to 1/4. I was originally looking at Sharkbite, but they don't have a 1/2" to 1/4" reducing coupler. Watts quick connect does have a 1/2 to 1/4 reducing coupling, but for some reason, those don't seem as robust as Sharkbite. I don't want a flood. Any recommendations? Any help is much appreciated!

  2. #2
    In the Trades Jerome2877's Avatar
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    Install a shut off valve off of the pex t. This will bring it down to 3/8", then run 3/8" pex to the fridge and connect to the copper with a 3/8"x 1/4" compression coupling.

  3. #3
    DIY Junior Member schloske's Avatar
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    Thanks for the reply. I actually already have a shutoff valve installed on for the line feeding the water filter, so that isn't necessary. I am hoping to use primarily push-fit fittings for ease and because I have terrible luck with compression fittings. I'm just having trouble finding the appropriate reducing connections.

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    Compression fittings for pex almost always require an internal reinforcement sleeve, but if you do use them, it should be easy to find the proper reduction fitting. Those sleeves are typically SS, but on the smaller sizes, they may be plastic.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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