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Old 06-01-2013, 12:20 PM   #1
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Pex or Copper for Crawl Space


i have a combination of copper and steel pipes in my 1950s home. most of the pipes in laundry room and bathroom are copper, while the pipes in crawl space are steel. as you can see, the steel pipes are leaking. would you use pex or copper pipes for my crawl space?

the water line from the well is also steel.














Last edited by Scully; 06-01-2013 at 12:26 PM.
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Old 06-01-2013, 01:19 PM   #2
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Pex or Copper for Crawl Space


I would change everything you can get to to pex
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Old 06-01-2013, 03:52 PM   #3
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Pex or Copper for Crawl Space


Do you trust plastic or cooper?
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Old 06-01-2013, 04:07 PM   #4
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Pex or Copper for Crawl Space


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Do you trust plastic or cooper?
I don't know if you're talking to me or not but I want to clarify mt previous post-
Replace all the galvanized pipe you can. I have no problems with copper.
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Old 06-01-2013, 04:14 PM   #5
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Pex or Copper for Crawl Space


A whole lot faster and cheaper to use Pex.
Might want to check out Pex Supply on the net. There prices for things like ball valves run about 1/2 what the box stores charge.
I also change all your main run to 3/4" not 1/2. Sure looks like someone used 1/2 on your water heater.
You will notice a big differance in the water pressure and flow with the larger lines.
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Old 06-02-2013, 12:54 PM   #6
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Pex or Copper for Crawl Space


i'm leaning towards pex, but i have some questions:

1. will pex freeze in crawl space?

2. the crawl space poses some interesting angles for the pipes. will that work better for pex?

3. will rodents pose a problem for pex?
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Old 06-02-2013, 01:23 PM   #7
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Pex or Copper for Crawl Space


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Originally Posted by Scully View Post
i'm leaning towards pex, but i have some questions:

1. will pex freeze in crawl space?

2. the crawl space poses some interesting angles for the pipes. will that work better for pex?

3. will rodents pose a problem for pex?
1. Pex will freeze- so will copper or steel. But it is more resistant to bursting. Any water line should be properly protected from freezing

2. Yes. You can bend it to save on fittings. The manufacturers websites should list the bending radius allowed.

3. I've heard stories of this happening but have not experienced it- maybe urban legends?
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Old 06-02-2013, 01:41 PM   #8
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Pex or Copper for Crawl Space


The biggest complaints I have heard about pex, mice will chew on it.
I have all pex in my home and have no mice. Plumber have used for years switches all old crap to pex,
It will freeze like any plumbing, will expand when frozen and then thaw out and go back to original size with no leaks.
I have friends that use it in their summer cabins, freezes over the winter and fine in the spring ... they do not bother to blow out the lines when they leave.

I am a fan of pex, I have not heard a good argument against using it.
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Old 06-02-2013, 06:56 PM   #9
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Pex or Copper for Crawl Space


If you feed the rats they will not eat your pex...
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Old 06-02-2013, 08:13 PM   #10
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Pex or Copper for Crawl Space


Leave the Copper that you have, change out the Galvanized to PEX. Easier to pull than trying to feed long sections of Copper. Especially if you are spending your time laying on your back under there.
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Old 06-02-2013, 08:15 PM   #11
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Pex or Copper for Crawl Space


Quote:
Originally Posted by Scully View Post
i'm leaning towards pex, but i have some questions:

1. will pex freeze in crawl space?

2. the crawl space poses some interesting angles for the pipes. will that work better for pex?

3. will rodents pose a problem for pex?
Everything with water in it, will freeze. You just need to make sure that space does not get down below freezing. If it does, insulate around the pipes, and use heat tape down the length of it, to keep it from freezing.

I would suggest placing a remote temp sensor down there, so that you can read what the temp is from say the utility room. Something like what you see in vehicles works fine. You would just have to drop the wire down the wall, with the bulb hanging down into the crawl space.
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Old 06-02-2013, 09:00 PM   #12
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Pex or Copper for Crawl Space


I heard the pex will not burst augment. All I will say is not true. Pex has replaced copper for price and easy of use. In many cases copper is better.
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Old 06-02-2013, 09:09 PM   #13
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I heard the pex will not burst augment. All I will say is not true. Pex has replaced copper for price and easy of use. In many cases copper is better.
Pex will burst just like Copper, if you let it freeze. If it gets too cold, it will crack like nothing you have ever seen, because it will become brittle like any plastic product, once you get to really sub-zero temps. Remember Pex is a trademarked name, and not every tubing that you find at the big box stores will truly be PEX brand. Most is cheap Chinese garbage that should never be on the shelf, same as the Copper that is on the shelves at most places.
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Old 06-02-2013, 09:17 PM   #14
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Pex or Copper for Crawl Space


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I heard the pex will not burst augment. All I will say is not true. Pex has replaced copper for price and easy of use. In many cases copper is better.
I prefer copper as well and pex is cheaper and easier. As for freezing- not only have I heard this argument but I have witnessed it. I have seen 1" CI fittings on fire sprinkler lines crack and flood a casino floor while my pex only froze and swelled, then thaw and return to service with no leaks.
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Old 06-02-2013, 09:20 PM   #15
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Pex or Copper for Crawl Space


Once, we filled a short piece with water- capped both ends and froze it in the freezer at the shop. Thawed out fine...
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