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Old 10-13-2011, 05:46 PM   #1
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Odd Shower Dripping


In our master bath we have a stand-alone, single handle shower. Intermittently, after the shower is used, we get a delayed drip. Sometimes it's within a half hour and sometimes it happens several hours later. It may happen multiple times between uses. At times itís just a little water or at others itís two cups or more. Iíve changed out the cartridge without effect. Itís as if the verticle pipe to the shower head above the faucet is emptying out, but I canít figure out what is pushing the water up and out of that vertical pipe. Everything else in the house drains okay, so I doubt itís a venting issue.

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Old 10-13-2011, 06:12 PM   #2
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Odd Shower Dripping


That is odd---is the shower tube directly above the handle or is it a rain shower in the center of the stall?

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Old 10-13-2011, 07:38 PM   #3
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Odd Shower Dripping


What brand of faucet is it ?
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Old 10-13-2011, 08:51 PM   #4
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The tube is directly abpove the handle.

It is a Moen.
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Old 10-13-2011, 08:53 PM   #5
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Odd Shower Dripping


Are you on a city water system or private?
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Old 10-14-2011, 07:15 AM   #6
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City.
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Old 10-14-2011, 09:07 AM   #7
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City.
Does your water heater have an expansion tank on top of it? Sometimes thermal expansion can cause those things to drip.

If it already has one, then check the air chamber to be sure it hasn't become waterlogged.

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Old 10-14-2011, 12:12 PM   #8
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It does not. I hadn't thought of that. Unfortunately, the way my utility closet is laid out, adding an expansion tank would be a major project. Any other suggestions?
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Old 10-14-2011, 02:54 PM   #9
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Odd Shower Dripping


Mine does the same thing; no clue as to why or how but the valve is not leaking. I think it is some kind of siphon effect; perhaps as the water cools down in the shower head, it contracts, a vacuum is broken, and water drains from shower head?
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Old 10-14-2011, 10:49 PM   #10
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Odd Shower Dripping


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It does not. I hadn't thought of that. Unfortunately, the way my utility closet is laid out, adding an expansion tank would be a major project. Any other suggestions?
They can be installed anywhere on the cold water system.......

There's also a device made by WATTS called a governor 80 that allows the extra pressure built up from water expansion to dump out of the fill valve on one of your toilets.

I don't really like this option because it's wasted water, and I think it's a bit more expensive than an expansion tank.
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Old 10-15-2011, 07:02 AM   #11
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Odd Shower Dripping


I have the same situation with my shower head,,always drips some after the valve is shut-off, not sure how much or for how long but its not a constant drip where I'd change the cartriage, I've just lived with it,, now it will be easier to accept knowing I'm not the only one.
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Old 10-15-2011, 01:31 PM   #12
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Odd Shower Dripping


Thanks. I'm on a slab, so the only place I have open access to the water lines is in that utility closet. I'll look into the Gov 80. Thanks again.

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