Faucet supply lines, incompatible gaskets?
Posted Jan 11, 2020, 5:39 PM UTC
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My old supply line (left) has a cone-shaped gasket thingy, but the new one has a dome-shaped. Either one will fit on my old faucet, but only the cone-shaped will work on my new Moen faucet due to plastic insets in the faucet's intake pipes.
I can't reusue the old lines because they're too short, but I can't find any supply lines for sale with the cone-shaped style (tried Lowes & HD).
Do I need to go to a pluming supply store to find the right lines? Do I need an adapter? Can I just drill out the faucet's insets or something?
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Whatever you do, Do not drill anything out! I have used those dome-shaped supply lines many times and they should fit. In theory that gasket shouldn’t even make contact until after a few turns.
Are you putting pipe-tape on the faucet hot/cold inlets? (Don’t)
Make sure the thread connection is 1/2 IPS or take a photo of the tag
Screwing supplies on can be tricky at times. Get under there and look at what your doing. You might not have everything aligned.
If all else fails just go to ace, Lowe’s, or Home Depot whatever will have a different brand Get it and use that instead.
GOod luck!
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Supply line is 1/2" FIP. Faucet is a Moen WS84667SRN.
Thanks for the advice, I'll give another go at just threading it on!
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The installation instructions say to "Install using 3/8" or 1/2" IPS faucet supply lines only." Am I correct in thinking that IPS and FIP are the same? When I looked up the acronyms (Iron Pipe Size and Female Iron Pipe) it sounds like they are.
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Looks like I'm not the only one. I did some googling for this specific faucet and found this user review:
"I recently bought 2 of these faucets to replace old faucets in a master bath. You absolutely need to use the plastic water source connectors for this model. The metal compression hoses do not connect to the bottom of the faucet securely if you can get them on at all. I spent hours try to get the threads to work - even took the faucet down to a hardware store and stumped the plumbing specialist there. We tried copper connectors and galvanized connectors and none would work with the faucet threads. The plastic connection lines have a different configuration with a wider cap and the threads easily worked together. Hope this saves you some headaches."
That matches my experience exactly, so far. The metal supply line simply will not thread on -- I've bought two different sets, with same result for both. Guess I'll try to find some with a plastic connector. Local stores don't carry them.
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Don’t tape the threads and get the new one snug. You’ll be fine.
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Is the old gasket stuck in the faucet? There's no gasket on the left
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One on the left was WAY over tightened at one point.
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[deleted]
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Not a plumber but it looks like the gasket on the left is compressed a ton. The right has a copper ring that will sit on the inside of the pipe just like that plastic bit.
Try the new one. I doubt they made a whole new set that won’t work with legacy faucets.
I thought that might be it too, but the dome is pretty stiff material, and I'm pretty sure it's not gonna compress down. Also, the dome hitting the inset prevents me from even getting the threading started. If it weren't for the new lines fitting on my old faucet, I'd think I had incompatible sizes or thread styles or something.