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Old 08-02-2008, 01:49 PM   #1
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Running new Main supply from Meter PEX or PVC?


I am running a new main supply line from the meter to my house. PEX is becoming popular around here for supply lines but most still have PVC. Which would you guys use? I am making a 45 foot run with 1 90 deg. turn. I live in southern TN but it does it get cold in the winter time especially at night. Any info would be appreciated. The rest of the house is plumbed with PEX.

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Old 08-02-2008, 02:47 PM   #2
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Running new Main supply from Meter PEX or PVC?


PVC isn't used for supply lines, CPVC is. Just to be clear!

I would use PEX over CPVC. PEX is capable of taking freezing temperatures without bursting, although the fittings are still susceptible to freezing. PEX can be buried for service mains, and can be used throughout the entire house as well.

You definately need to bury the water line well below the frost line!

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Old 08-02-2008, 03:47 PM   #3
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Running new Main supply from Meter PEX or PVC?


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Originally Posted by thekctermite View Post
PVC isn't used for supply lines, CPVC is. Just to be clear!

I would use PEX over CPVC. PEX is capable of taking freezing temperatures without bursting, although the fittings are still susceptible to freezing. PEX can be buried for service mains, and can be used throughout the entire house as well.

You definately need to bury the water line well below the frost line!

In South Carolina, PVC is commonly used from the curbside meter to the house. 3/4 inch PVC has more capacity than 3/4 inch PEX, if you use pex I would upsize to 1 inch.
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Old 08-02-2008, 03:50 PM   #4
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Running new Main supply from Meter PEX or PVC?


Thanks. Does the PEX need to be sleeved in conduit or ?. Ok so for a supply with PEX I need 1 inch , 3/4 is too narrow?
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Old 08-02-2008, 10:03 PM   #5
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Running new Main supply from Meter PEX or PVC?


3/4" PEX and 3/4" pipe have the same capacity. Some PEX fittings are necked down to 1/2", theoretically limiting the flow. I can tell you that I have 3/4" PEX in my house and have never had any issues with low volume or pressure.

PEX can be direct-buried.

Size is determined by the fixtures in the house. Most homes are fine with 3/4". It depends on what the demand is. When in doubt, run 1" into the house and branch off from there.
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Old 08-02-2008, 10:08 PM   #6
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Running new Main supply from Meter PEX or PVC?


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In South Carolina, PVC is commonly used from the curbside meter to the house.
Ok, I stand corrected. I've never seen that done, although it is permitted by code.

Personally, I'd wouldn't consider using a brittle material like PVC for a water line in a burial condition when other options like copper or PEX are available.
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Old 08-02-2008, 11:16 PM   #7
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Running new Main supply from Meter PEX or PVC?


I vote for copper.
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Old 08-03-2008, 07:00 AM   #8
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Running new Main supply from Meter PEX or PVC?


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I vote for copper.
I agree but with the $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ of K copper I would use Pex.

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