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Old 01-18-2016, 11:50 AM   #1
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Bath tub drain leaks


I have installed three bathtubs now and I always have a problem with water leaking from the bottom drain underneath the tub. I line up the drain with the PVC pipe and tighten it with a fork style wrench. I place clear silicone caulk underneath the drain first. Should I use Plumbers putty instead? Any pointers would be appreciated.
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Old 01-18-2016, 11:54 AM   #2
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I don't believe in silicone for plumbing work. I'm not a plumber so they may disagree. I've used plumbers putty only with no issues.
Did you install the rubber washer between the tub and drain flange?
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Old 01-18-2016, 12:03 PM   #3
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plumbers putty is old school, it dries out and leaks and the oils in it can leach into marble, granite and some of the man made materials used for tubs and sinks, silicone is the way togo..once hardened it wont go anywhere, use afta cleaning fluid to clean it up, works great... as far as your leak, make sure the rubber gasket is on the bottom and you tighten the threaded drain piece into the shoe of the trip lever...a small bead of silicone holds the bottom gasket on the shoe and another bead around the threaded drain piece...
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Old 01-18-2016, 12:16 PM   #4
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I'm mostly a silcone guy too. Too many call backs from putty, especially during rough in's in sub freezing temps.
What W&O assemblies are you using?
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Old 01-18-2016, 12:33 PM   #5
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Old 01-18-2016, 12:40 PM   #6
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another reason for silicone, all the cheap plastic components made today would break if you tightened them down enough to squeeze out plumbers putty....the old solid brass drains and faucets could be cranked down tight and not give or break...
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Old 01-18-2016, 02:14 PM   #7
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Just a heads up---sometime the leak is from the overflow gasket---those often don't show up for a while---are you sure the leak is from the bottom of the tub?
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Old 01-18-2016, 06:14 PM   #8
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Did you use a water based (latex) silicon caulk? You need to use 100% clear silicon caulk.

http://www.lowes.com/pd_51220-72643-...5-00007b120833
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Old 01-19-2016, 05:09 AM   #9
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It seems all the pros like silicone.
Do you need to wait 24 hours before checking for leaks?
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Old 01-19-2016, 05:39 AM   #10
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You can test the assembly right away---the rubber gasket below the tub is the real water tight seal---

Leaks are often caused when the bottom of the hole is not absolutely smooth--
Bits of old gasket---drips of glaze---any bump can cause a gasket to not fully seat.
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Old 01-19-2016, 05:51 PM   #11
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Actually water makes silicon caulk hard.
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