After having a Minor Leak, updated my RO/DI Hookup. Used from Lowe’s Faucet Item # 367489, Faucet Supply Line Item # 751643 a new under sink shut off valve with double 3/8” Compression Fittings. Drilled a 7/8” Hole with a center pilot hole saw, in the plastic laundry sink. I got a 1/2” Plastic Electric KO Nut out of my hardware. Took about an hour to assemble everything. I had to set the Faucet up a little high due to a obstruction under the sink deck. Which you may not have to do.