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/diy/ - Do It Yourself

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2000332 No.2000332 [Reply] [Original]

I get that the zinc coating wears away from use over time, but it seems like starting with an non-coated end of the pipe would significantly reduce the pipe's lifespan.
Is coupling smaller pipes together better than cutting and threading galvanized pipe to a desired size or am I overthinking things?

>> No.2000348

>>2000332
https://en.wikipedia.org/wiki/Galvanic_anode

>> No.2000436

>>2000332
Yes, you are overthinking. Steel pipe will corrode, it's lifespan is still pretty good in relation to the price per meter. If you really mind that but don't mind spending go with copper piping. For tanks you can use an anode as posted above.

>> No.2000457

>>2000332

Spray the thread with cold galv before doing it up. Or just paint ends with rescue steel or copper grease.

>> No.2003168

fuck these pipes

>> No.2003268

>>2003168
DO NOT stick your dick in pipes.

>> No.2003615

>>2000332
You might as well ask what the best route is for the pony express, or discuss the best techniques for cooking dinosaur meat.

>> No.2005371

>>2000332
You are way overthinking it. Anytime you have galvanized water pipes they WILL corrode. Just a matter of time. Cut all that shit out and replace it with copper or plastic (cpvc or pex).

>> No.2005623

https://americanvintagehome.com/advice-for-older-homes/need-swap-galvanized-pipes/

The galvanized pipes installed on water lines between 1880 and 1960 were dipped in molten, naturally occurring zinc. Naturally occurring zinc is impure, so these pipes were bathed in zinc that also contained lead and other impurities. The zinc coating elongated the life of the steel pipes, but added small amount of lead and other substances that could potentially harm inhabitants.

Additionally, if your galvanized pipes were ever connected to lead plumbing (including service lines) there is more cause for concern. The corrosion inside galvanized steel pipes could have trapped small pieces of the lead. Even if the lead piping was removed years ago, the galvanized steel pipes could still periodically release the trapped lead into the water flow. Chicago didn’t stop using lead pipes for service lines until 1986, and an estimated 400,000 lead service lines are still in use in Chicago alone.

The only way to ensure that lead is not mobilized from plumbing to tap in a given home is to fully replace the galvanized plumbing and any lead service lines.

The USA really is a third world country, huh?

>> No.2007553

>>2005623
>third world country
The word you're reaching for is underdeveloped.

We were on a side during the Cold War so we're not in the Third World.

>> No.2007594
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2007594

>>2005623
>400,000 lead service lines are still in use in Chicago alone
My gram has a house built in 56 with what I thought were iron pipes but probably galvanized steel. all threaded connections. Is there an easy way to inspect how corroded they might be now?

>> No.2007985

The pipe will always rot out at the threads before anything else because there's less material there and more erosion due to turbulence at the points where fittings connect. Even so, normal non-industrial use the pipes will last decades.