I am remodeling my bathroom and installing a single vanity in place of a double vanity. There are two sets of PEX water supply lines in the wall - can one of those sets be plugged?image of one side attached - both sides identical

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    You don't want un-swept legs in the plumbing system. Bacteria or other microorganisms could harbor there because (1) the chlorine level will drop in a dead leg and (2) there would be no mechanical sweeping out of the pipe by flow – Jim Stewart Jul 5 at 23:15
  • @JimStewart really? Not sure how big of an issue this really is. I hope not too big since I capped off a similar set recently – Kris Jul 6 at 0:10
  • Ask the plumbing inspectors about it. You are getting this inspected, right? Maybe I am perfectionist, but I think capping off a short dead leg might be OK, but I would not think that more than a few inches would be acceptable. – Jim Stewart Jul 6 at 3:18
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    Based on what I have read since Jim's answer I agree it's not a good idea. I have a plumber coming out today to give me an estimate for removing the lines completely. Thank you Jim :) – Colleen M Jul 6 at 10:53
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    Quick update. Plumber just left - he verified that it would be okay to plug off the unused supply lines based on my particular configuration. Relieved to not have to cut out subfloor sections! I do not regret calling him though, as I did read some pretty bad horror stories about un-swept legs and bacteria. Would rather pay someone to do it right if it means my family doesn't get sick. – Colleen M Jul 6 at 15:51

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