Toilet Water Supply Line Leak at Tank End
#1
07-29-15, 02:18 PM
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Toilet Water Supply Line Leak at Tank End
The water supply line is made of opaque, plastic-like tubing with, what I think is called a captive cone washer. Cannot tell if the steady water drip is from above coupling nut or below it. We will be moving from this house in at the most a year so looking for a quick, inexpensive fix. Would sealing thread tape on the metal threaded shank of valve do the job? 
#2
07-29-15, 02:19 PM
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I'd just go buy a braided line and replace it.
Last edited by stickshift; 07-31-15 at 10:23 AM. Reason: typo
#5
07-31-15, 10:21 AM
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Thanks for the suggestions. I of course had to try to thread tape since we already had some, and of course it didn't work! So as told, I installed a braided supply line over 24 hours ago and no dripping - job checked off! Thanks for the quick replies.
#7
07-31-15, 01:21 PM
I see your issue is resolved but one thing I would recommend from my own personal experience is that when it comes to thread tape opt for the heavy duty kind. After I switched to it I would never go back.
#8
07-31-15, 02:36 PM
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For compression fittings, tape or pipe dope should not be used. It hinders more than it helps. Although the tape helps in sealing some leaks, that's not it's intended purpose. It's meant to be used as an anti-seize on pipe threads.
#9
08-10-15, 10:21 AM
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About a day after replacing the water line with a braided one and not seeing any leaks with water running, I noticed it was leaking again. I shut off the water and just didn't use that toilet. I just finally had some time to look at it again and could finally tell the water was coming up and over the top of the coupling nut. This time I really hand tightened it as much as I could. With a flush and water running, I don't see a leak, but time will tell I guess. I don't know if it has any bearing, but the thin sealing tape is still on the threads....
#10
08-10-15, 10:25 AM
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If it doesn't leak, I'd leave it alone. If it does, my next step would be to get rid of the tape.
#11
08-10-15, 11:20 AM
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With compression fittings, tighter is not better. Tape or dope is not better.
Clean the male threads. Hand tight plus a quarter turn, do not torque down or you will develop leaks.
In your case, check carefully and make sure the leak is not coming from the fill valve to tank connection and seeping down to the top of supply line nut.
Clean the male threads. Hand tight plus a quarter turn, do not torque down or you will develop leaks.
In your case, check carefully and make sure the leak is not coming from the fill valve to tank connection and seeping down to the top of supply line nut.
