Kohler faucet supply line ... to a compression fitting?

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Old 12-17-18, 08:10 PM
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Kohler faucet supply line ... to a compression fitting?

Hey gang,

I bought a new Kohler 'Rubicon' kitchen faucet. It comes with built-in supply lines, to attach to my water supply valve, but I'm confused as to whether they are "compression" style.

The female end of the faucet's built-in supply lines don't seem to be designed for a compression fitting, because they are fairly shallow, they are not really beveled to accept a ferrule, and the most important hint is that they have a big washer inside of them, that I feel like the edge of a compression ferrule would simply cut into.

However, the only water supply valves I could find at the hardware store all have 3/8" compression water line fittings, and come with a compression ferrule.

Hmm. What to do! Am I correct in assuming I do not want to treat this connection as a compression fitting, and that I can simply discard the water supply valve's ferrule and nut, and simply tighten the 3/8" water supply line to the valve without it? Or did I just buy the wrong thing and my hardware store sucks -- what exactly am I looking for then? Or perhaps the Kohler supply line is actually a compression fitting and I'm just high.

 

Last edited by jishaq; 12-17-18 at 08:12 PM. Reason: Fixing image
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Old 12-17-18, 08:47 PM
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I can simply discard the water supply valve's ferrule and nut, and simply tighten the 3/8" water supply line to the valve without it?
Yes..... that's what you will be doing.
 
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Old 12-18-18, 07:22 AM
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am I the only one who doesnt like that many faucets come with supply lines built in now?
 
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Old 12-18-18, 08:34 AM
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I agree, Tevil.
The first time I saw a faucet with built in supply lines, I thought " these attached lines seem a bit thinner than the separate braided lines I am used to, but I guess that this the "latest and greatest approach" ", and installed the faucet..... 4+ years later, when the attached supply line failed (thankfully while we were home to quickly shut it off), i had to replace the entire faucet.
Hopefully "attached supply lines" are a thing of the past.
 
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Old 12-18-18, 01:07 PM
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I tend to open the boxes at the store and avoid the ones with them. It seems to be mainly a kohler thing as I installed a kohler in one of my units and it had them. to me the issue is the rubber gaskets. If you ever have to take those supply lines off and re attach them for a repair or sink replacement, etc the rubber tends to be crushed, dry or shrunk and youre going to be using extra tephlon at that point.
 
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Old 12-18-18, 01:16 PM
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I hate them too. Right up there with the plastic quick connect fittings on recessed fixtures. I have them on a Pfister faucet and a Delta.
 
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Old 12-22-18, 02:34 PM
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I just came across a Delta (supplied by the client) with 3/8" supplies -- the clients stops are 1/2". Delta sells adapters for $32 each, which I found out after a painful call to Delta (1/2 hour on hold listening to the same awful commercial over & over & over).

I'll just replace the stops, and never ever call Delta again. Life's too short to waste it that way.
 
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Old 07-16-19, 04:20 AM
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The first time I saw a faucet with built in supply lines, I thought " these attached lines seem a bit thinner than the separate braided lines I am used to, but I guess that this the "latest and greatest approach" ", and installed the faucet..... 4+ years later, when the attached supply line failed (thankfully while we were home to quickly shut it off), i had to replace the entire faucet.
Hopefully "attached supply lines" are a thing of the past.
The one time I had to change our faucet with integrated supply lines I actually liked them from a repair point of view. Crawling up behind the underside of the sink and trying to loosen the line fittings that are corroded solid can be unpleasant. The integrated lines put the fitting connections where they can be more easily accessed. I actually like changing out a faucet cartridge and "O" ring better than dealing with the old fashioned stem packings and faucet washers and trying to smooth corroded valve seats so the washers will hold. So not that big of a deal.
P.S.: Yeah, I'm a female, lol
 
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Old 09-09-19, 03:02 AM
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Kohler tap fitting 3/8 to 3/8

Hi all,
I am based in Australia and have imported a beautiful Kohler faucet. I purchased all the necessary adaptors NPT to Australian thread standard BSP. All was ready until I saw that the 3/8 male fitting I have (which connects Kohler to main water valve) is too big for the supposed 3/8 Kohler outlet. The user manual clearly states I need a 3/8 valve, so why is my 3/8 adaptor not fitting and what size do I need? please? Name:  3:8 to 3:8.jpg
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Size:  2.90 MB

Many thanks in advance, Jenny
 
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