Anyone have any experience/opinions about this particular valve? My kitchen sink plumbing has no shutoffs, and I am considering these to attach these (they attach with 3/8" female compression) where the kitchen faucet lines are currently connected, so as to add shutoffs without dismantling any existing plumbing. Found these at the big box store... Also, if anyone can explain how the female compression works on these. (Also, the directions don't say, but I presume the standard finger-tight then 1/4 to 1/2 turn). Thanks.



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i'm assuming they are 5/8 compression by 3/8 compression stops ??
cut the copper tubing neatly, slide on the nut and ferrule, put a dab of grease to help tightening and crank away on them until they are pretty tight. two wrenches..
the top will take a flexible connector from the stop to the faucet. get good quality stainless connectors. those you don't overtighten to the stop.

on the input side, it's a 3/8" female compression, with a captured nut, which is tightened onto the output side of an existing shutoff (a way to replace a faulty shutoff without removal) or in my case to where the existing line has a compression fitting. I saw another brand on A---- (Watts LFPBQTR-615 Quarter Turn Retrofit) with great reviews but seems that it's out of stock, as the seller sent me another brand (ProLine). To see a picture of the Keeney, on A---- search on "Keeney 2072PCLF 3/8-Inch O.D. Captured Nut by 3/8-Inch O.D. Lead Free Quarter Turn Straight Repair Valve" for a picture of it (shown attached to an old shutoff).

that will work. just a touch of grease on the male threads of the old valve to make them slippery and tighten quite firmly. i use a 5/8 open end wrench on those nuts. if it leaks make it tighter.

No picture but he seems to be describing a 3/8 x3/8 comp/comp "add a valve", which should work depending on how the sink is connected.