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Slab Leak - Repipe v. Epoxy Coat Pipes

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Slab Leak - Repipe v. Epoxy Coat Pipes

Old 09-30-2008, 10:09 AM
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Default Slab Leak - Repipe v. Epoxy Coat Pipes

Had a plumber out yesterday to fix a leak in copper supply line running under the slab of my house. Said I could expect future problems and should consider repiping the house or to look into epoxy coating the interior of the piping (he doesn't do either). The epoxy coating process is done by franchisees of AceDuraflow. Anybody have any experience with this process? Pros, cons, cost? Thanks.
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Old 09-30-2008, 11:30 AM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

I'm interested in the answer also.
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Old 09-30-2008, 12:26 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

Are you talking about the main line from the water meter that comes into your house or do you have all of your piping under the slab and have several problem locations?
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Old 09-30-2008, 12:34 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

We had a leak in the incoming main copper pipe under our slab, and (naturally) it was right underneath the shower in the master bathroom. Our choices were (1) tear out the shower, break up the slab, replace the bad pipe, close everything back up, rebuild the shower, and hope the repair holds, or (2) repipe using PEX. We pretty obviously chose option 2.

Seems the Florida soil conditions and 20+ year old copper pipes are not a good mix.

Really haven't heard anything one way or the other re: epoxy coating. But it somehow sounds expensive and fairly time-consuming.
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Old 09-30-2008, 09:33 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

Hi,

good luck.

I think the standard solution is to repipe the entire house, running the pipes through the attic area, and just disconnect from the pipes in the slab.

A friend in our neighborhood (upscale, 5 year old house) had this happen to them. There can be an element of galvanic corrosion to it. There is a way to measure the voltage of your copper piping, relative to a piece of copper stuck in the ground outside your house, and thereby figure out if there is any "sacrificial anode" protecting your copper from the concrete, or if the copper is at risk. Basically, you want your house piping to be negative 0.2 or more volts relative to a copper wire stuck in moist earth. I have my chemistry students do this as an experiment when we teach redox reactions.

I think you will prefer to do a complete replacement rather than try for the patchwork repair. But I only have my neighbor's experience as a reference point.

gordon
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Old 10-01-2008, 05:00 AM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

You will hear more and more of this in the future. Plumbing anywhere it can't be accessed easily is a recipe for disaster. I've never figured out why is was ever allowed as code. Sorry about your trouble, and I hope you can come up with a solution. Just my 1 cent.
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Old 10-01-2008, 03:52 PM
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Default RE: Slab Leak - Repipe v. Epoxy Coat Pipes

most problem's are not with the pipe but with the fitting's.most of the slab leak's i fix are from 90's that have failed.if it where me or one of my costumer's i would recommend a re pipe as if you have one it's just a matter of time before you have another.sometimes when it is repaired they can cause another leak from disturbing the pipes.CPVC in the attic is the best way IMHO.find a good plumber and make sure they put air chamber's on so it don't hammer in the attic.



as far as the epoxy coating,i think your just prolonging the problem.

if your near me i can recomend a good plumber to you
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Old 10-01-2008, 04:11 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

I failed to mention; we did have the entire house repiped, going through the attic with PEX. Makes for a nice installation, with one drawback: In Florida in the summer, attics tend to get extremely hot. When we turn on a cold water tap, the water coming out is uncomfortably hot for the first two or three minutes. I had played with the idea of retrofitting the cold water piping with foam insulation jackets, but I really don't think it would make that much difference.
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Old 10-01-2008, 05:12 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

PostOpus - 10/1/2008 7:11 PM

I failed to mention; we did have the entire house repiped, going through the attic with PEX. Makes for a nice installation, with one drawback: In Florida in the summer, attics tend to get extremely hot. When we turn on a cold water tap, the water coming out is uncomfortably hot for the first two or three minutes. I had played with the idea of retrofitting the cold water piping with foam insulation jackets, but I really don't think it would make that much difference.


it won't,it is to hot for any insulation in florida the insulation code is for freezing pipe's in the attic
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Old 10-01-2008, 05:17 PM
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Default Re: Slab Leak - Repipe v. Epoxy Coat Pipes

Exactly why I decided against it.

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