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Old 09-22-2007, 12:07 PM   #1
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Replacing water line under driveway


My 30 year old house has a " ABS (I think cause it's black) water line that feeds a garden spigot that runs under my driveway. It's about 15" deep, and the pipe has cracked and leaked in three different spots over the last couple of years. As I am tired of trying to locate the leak and dig it up and repair it (it's covered with asphalt) I've decided to replace the whole section that runs under the driveway.

My question: Is ABS right for this job? Is it normal to break down after 30 years? Should I replace it with something else such as galvanized pipe or PVC?

Thanks for any help, Tom

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Old 09-22-2007, 01:00 PM   #2
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Replacing water line under driveway


P.e.x. pipe

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Old 09-22-2007, 03:06 PM   #3
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Replacing water line under driveway


I used to think PVC and CPVC were gifts from GOD. But, nothing seams to last forever.

Maybe the best watering system is pray for rain... unless you live in
Las Vegas.
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Old 09-22-2007, 05:03 PM   #4
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Replacing water line under driveway


I forget what it's called, but that flexible rolled water line isn't ABS I do not believe.
In any case, I agree with redline...go with PEX. It also is plastic, but when it freezes, it swells rather than bursts and then returns to its original pipe shape. You can rent or borrow the pex connector crimping tool(s).
Good Luck!
Mike
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Old 09-22-2007, 05:56 PM   #5
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Replacing water line under driveway


I've never heard of PEX before. I live in a small town, so I'm not sure it's available. I live in California and I don't think freezing is the problem. After all, it did hold up well for 28 years without leaks.

What is standard construction procedure for placing a water line under a driveway? Is PEX the norm or something else?

Thanks, Tom
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Old 09-23-2007, 06:11 AM   #6
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Replacing water line under driveway


It seems very strange for the line to break from any other reason aside from freezing. The first thing you need to do is find out what the code approved materials are for underground to a sprinkler and how deep it needs to be buried. I've never heard of anyone burying pex before. Most likely they'll give you a choice between K copper, poly, and possibly CPV. I'd go with the poly (or pex if it's allowed) because it's flexible and cheap. What you want to do if it ever drops below freezing there is pitch the pipe back towards the house and after your ball valve to shut the line off install a boiler drain so that the line can be completely drained from it.
Make sure when backfilling not to throw any rocks around the pipe.
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Old 09-24-2007, 07:13 AM   #7
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Replacing water line under driveway


Look at the PEX, and you might be able to push a 1/2" inside the existing pipe, no excavation other than on each end.

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