I use one of the brass Y fittings on the cold water supply. One of the outlets goes to the washing machine. The other one has a series of adapters to eventually connect to the 1/4" RO tubing. I also put in a ball valve so that I can easily turn on/off the water supply to my system.
Cody, I couldn’t get that fitting to not leak. Wrapped it many times with plumbers tape and tried tightening with pliers.. :/
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