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Posted by ransley on January 11, 2008, 11:40 am
> Once you determine the location where the pipe enters the slab area, and
> where it comes out of the slab, draw a line on the slab and drill a few ha=
lf
> inch test holes to see if the dirt is dry or muddy. Or if possible, just
> abandon the pipe under the slab and run a new one
>
>
>
>
>
> > Thanks for all your responses. We went back over there yesterday and
> >>> > checked
> >>> > the water meter. The dial was spinning even after we made sure
> >>> > everything
> >>> > was shut off. Then we shut off the supply valve to the water heater
> >>> > and
> >>> > the
> >>> > water meter quit spinning. We left the valve off for a while and whe=
n
> >>> > we did
> >>> > turn it on there was hot water. This tells me there is an under slab=
> >>> > leak in
> >>> > the hot water pipe.
>
> >>> > We used an inferred thermometer to test the temperature of the floor=
> >>> > near
> >>> > the kitchen sink and in the bath rooms while the water heater had
> >>> > pressure
> >>> > and when it did not have any pressure =A0to see if there was any
> >>> > difference
> >>> > and found none. This was done over a few hours, but still no
> >>> > temperature
> >>> > difference in the floor.
>
> >>> > Any hints on finding under slab leaks?- Hide quoted text -
>
> - Show quoted text -
Some Menards sell a cheap moisture meter for measuring wood or
concrete moisture content, where it is wettest would be the leak. If
it is old copper it might be worth abandoning as acids in concrete
have made many radiant heating systems get leaks. A microphone moved
along the pipe area might alow you to hear it leaking
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