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Discussion Starter #1
I had to remove my toilet to replace the flange. When I put it back together there is a consistent slow drip at the plastic nut right on the bottom of the tank, not the supply line nut.
See the picture. It's pretty tight....more than just hand-tight, I used a wrench to get some movement. I'm cautious about overtightening because I don't want to crack the tank. The Kohler tank came with the valve kit. Is there a better nut I can use to stop this leak? Something better than a plastic nut.



For grins I emptied the tank and removed the valve. There aren't any cracks on the washer at the bottom of the valve.
See picture of valve.



I pieced it all back together and I still get the drip. It didn't do this when I installed the toilet a couple weeks ago.
Thoughts?
 

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replace the supply line. they get flattened out over time and can be difficult to reseal. new ones are around 6 bucks at the box store
 

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Discussion Starter #4
I did replace the supply line. The one in the picture is brand new.

So you think applying plumbers dope will stop this, huh?
I guess it doesn't hurt to try.
 

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It will work. My first thought was you over tightened and cracked the nut but you said it was ok after you un-installed everything. I replaced 6 sinks the other day and the owners wanted to still use there “old fittings” which btw I told them once removed they would probably leak after all these years. Sure enough they leaked. I applied the dope on the threads and no more leaks.
Give it a try…
 

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a second look at the pic shows water above the nut for the flex line. looks like you're getting water from the tank, try tightening the nut on the fluidmaster...

then i reread the post, see you've already said that. i wouldn't use putty or dope, see if you can get a new washer or just buy a new fluidmaster. it gonna need to be pretty tight to seal it up
 

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Discussion Starter #7
Also, I removed the supply line and poured a gallon of water in the tank. It began to slowly drip. That would tell me that its the washer on the fluidmaster but its only been used for two weeks so its kind of hard to believe. I'll try the teflon tape and plumbers dope next...
 

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I usually coat the fluidmaster rubber washer (before putting it on the unit) with plumbers grease on both sides and inside where it fits on the fluidmaster threaded shaft. It seems to help the washer spread and seal better (it's actually pretty soft rubber). Also make sure the tank is clean around the hole where the rubber washer seats to the bottom of the tank. Just a few grains of crud underneath it can make it leak. Good luck:thumbsup:
 

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Discussion Starter #9
I planned on working on this today (Sunday), but guess what happened?
The leak stopped and I didn't do anything between now and my last post.
Strange happenings...
 
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