Welcome to Plbg.com
Thank you to all the plumbing professionals who offer their advice and expertise

Over 605,000 posts related to plumbing

Welcome to Plbg.com (aka: PlumbingForum.com) we are the most popular plumbing information sharing, advice, DIY and educational forum on the Web. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep all posts positive and no advertising. This site is free and made possible by:  

Post New
Log In
How to Show Images
Newest Subjects
 water piping
Author: pbw (OH)

over the years that I've engaged in the plumbing industry I have run across some interesting projects. This one continues to perplex. when dealing with copper water piping, when a water well is used & that well has developed acid water (most times, a mild acid) the copper water piping begins to have pin holes, understandable. but why is it those pin holes mostly develop in the horizontal piping & not the vertical? the use of "M" or "L" copper doesn't matter, although it takes longer with "L" but still happens.
As some of you know, water in a well changes over a period of time. so what starts out to be a neutral water, sometimes turns acidy.
I will wait patiently for the discussion to develop.

Post Reply

 Re: water piping
Author: Pipe runner (AZ)

because the hard sediment/particles tend to settle on the bottom of the pipe and when water flows most of the collisions are on the bottom of the pipe. This abrasion along with the corrosive effect of the acidic water is stripping away at the metal.
I'm just guessing.
Good topic though. Something to think about when you laying on your back under a house looking at water pipe.

From apprenticeship class I remember one topic about laminar flow and turbulent flow. It is unequal flow rates of water within the pipe and directed to the surface that corrodes pipe.

Edited 1 times.

Post Reply

 Re: water piping
Author: PlumberLoren (CA)

What Pipe Runners says makes sense to me. Have you considered changing to PVC. You can order Schedule 80 for strength and I am sure it will not pin hole. Good luck.

Post Reply

 Re: water piping
Author: pbw (OH)

pipe runner, what you suggest may very well be right about the sediment. but from what I recall most of those pin holes were toward the top 1/3rd of the pipe. There will be no more crawl spaces for me, I retired Sept. of 2015.(I'm trying to purge pipe dope, solder paste & glue from my system with a small flock of chickens)
turbicidy does play a part, especially when a circulating pump is in use. Elbows usually take the brunt of that.
plumber Loren, the copper was mostly replaced with CPVC. A large invoice accompanied the replacement. after all we plumbers have to up-hold our reputation.

Post Reply

Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:

Special thanks to our sponsor:

Copyright© 2017 Plbg.com. All Rights Reserved.