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  1. #1
    Join Date
    Apr 2013
    Location
    Massachusetts
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    28

    Default any disadvantages to Pex plumbing?

    I'm in the process of buying a house built in 1928 in MA. The inspection found multiple spots where brass was connected to copper, resulting in corrosion. He recommended replacing it with Pex. I've been doing a little reading and watching youtube videos, it all sounds great. Are there any downsides to replacing all supply lines in the basement with Pex up to the risers?

  2. #2
    Join Date
    Sep 2012
    Location
    Boston
    Posts
    888

    Default Re: any disadvantages to Pex plumbing?

    i can't think of one downside, i use it all the time.

  3. #3
    Join Date
    Aug 2007
    Posts
    6,616

    Default Re: any disadvantages to Pex plumbing?

    Pros:
    1 - It's cheap

    Cons:
    1 - Mice and rats LOVE it.
    2 - It's plastic
    I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!

  4. #4
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,183

    Default Re: any disadvantages to Pex plumbing?

    Pex is the way to go. But your statement about copper being connected to brass, are you sure he said brass and not galvanized pipe? There is no problem with copper to brass. What may be the case in a home that age is the piping is threaded brass which is failing do to its age.
    John

  5. #5
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,436

    Default Re: any disadvantages to Pex plumbing?

    Brass has copper in it, and it doesn't corrode when attached to a copper fitting.

    PEX could be the right pipe for you. The jury is still out on PEX and the risk of plastic in drinking water. It could take decades to find out it's not safe. It was approved to be used in CALIF only 3-4 years ago, yet very few plumbers use it here.

    In the meantime, it's cheap, easy to install, has fewer connections - plumbers and DIYers love it, in places where it's to code. Just don't expose it to sun and light.

  6. #6
    Join Date
    Apr 2013
    Location
    Massachusetts
    Posts
    28

    Default Re: any disadvantages to Pex plumbing?

    Thanks! The rats/mice point is interesting, haven't seen that yet. I have two cats though, so that should help. I have no worries about it being plastic either.

    Here's a quote from my inspection report:
    "There is brass water piping that has electrolysis in a number of locations . Some areas are taped. This is older piping that is nearing the end of its life . The need to replace the brass water piping should be expected."

    I'll keep the light exposure in mind. I'm planning to (someday) finish the basement too, at which point it shouldn't be exposed.

    I'm strongly considering replacing all supply lines throughout the house and having a manifold system.

  7. #7
    Join Date
    Feb 2013
    Location
    The thumb, MI
    Posts
    54

    Default Re: any disadvantages to Pex plumbing?

    Quote Originally Posted by willsonsarah View Post
    ...Pex piping, it is basically crossed-linked polyethylene pipe that makes it undurable and long lasting...
    I'll remember that next time some environmentalist tries to convince me poly lasts forever.

  8. #8
    Join Date
    Mar 2009
    Posts
    1,387

    Default Re: any disadvantages to Pex plumbing?

    Howdy, manifolds sure use allot of additional pipe. The 25 year warranty seems too short for plumbing compared to copper. But the $$$ difference and ease of running pipe is very appealing to me. Check out Dahl of Canada plumbings pex shutoff valves and the UV shielding for stub out with pex instead of copper. I'm re plumbing a grand old home an using the stainless steel crimp rings - one tool to crimp makes the job easy and inexpensive.
    Any an all of my comments are just my opinion and not to be confused with facts.

  9. #9
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,183

    Default Re: any disadvantages to Pex plumbing?

    Quote Originally Posted by Timothy Miller View Post
    Howdy, manifolds sure use allot of additional pipe. The 25 year warranty seems too short for plumbing compared to copper. But the $$$ difference and ease of running pipe is very appealing to me. Check out Dahl of Canada plumbings pex shutoff valves and the UV shielding for stub out with pex instead of copper. I'm re plumbing a grand old home an using the stainless steel crimp rings - one tool to crimp makes the job easy and inexpensive.
    There is no warranty on copper and it will fail, in many cases in less then 25 years.
    John

  10. #10
    Join Date
    Apr 2013
    Location
    Massachusetts
    Posts
    28

    Default Re: any disadvantages to Pex plumbing?

    Wilsonsarah, do you have a link to an article or something that shows it to not last long? One weakness of PEX is vs UV light, is that what you're talking about?

    Copper looks like it's vulnerable to certain pH levels, whereas PEX is not. http://www.youtube.com/watch?v=TpZLft4WLss

    The 25 year warranty for PEX is pretty impressive, and leads me to believe it will last if a company is willing to stand behind it for that long.

    One downside to PEX I've found on the internet is a few cases of people saying it leaves a plastic taste in their water. Some attribute that to confusion between PEX and CPVC, while others think there may be some bad brands of PEX that you should stay away from.

    I think I can avoid that issue by buying a known brand from a reputable store. PexSupply.com looks like a solid site, with a great rating from resellerratings.com. Their products have lots of positive reviews too. For instance, 1/2" Rifeng PEX looks great with a 4.9 out 5 rating from 61 reviews. Would you guys agree?

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