How to Stop Copper Pipe Corrosion | Ask This Old House

This Old House plumbing and heating expert Richard Trethewey explains causes and cures for water-pipe corrosion.
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Homeowners have a virtual truckload of questions for us on smaller projects, and we're ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers-and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O'Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.
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How to Stop Copper Pipe Corrosion | This Old House
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[@30AndHatingIt]

Anyone else watch this video and go "Yup... I'm screwed"?

[@195421dlp]

Excellent job guys!! Im a carpenter/plumber /GC. My clients always believe that if a water heater looks good from the outside then the world is perfect. Now I have something to show them. Keep up the good work!

[@mikegert2199]

Guys, Thank you for that great informative video. You have just made an old plumber very happy. Truth, I had bits & pieces of that knowledge but you guys put it all together in a very coherent form. Once again, very well done & thanks.

[@ElementofKindness]

Wow, I had no idea so many things can effect copper piping. I will take it to heart when I get to that stage of my build!

[@Memories4lifemedia]

Fully qualified plumber in UK so aware of this problem but good to see the effects of this so making it easier to diagnose thanks

[@Delta9D9]

Just learned this now. I had no idea that flux on the cold line could do such a thing. Have that very issue as pin holes are developing everywhere and all around the copper tubing. Mostly near joints.

[@dg903]

FANTASTIC info! Gives me an idea of what got my pipes to leak! Thank you!

[@Sailor376also]

Builder of 50 years. Licensed originally in Boston 1972.

[@tazzertime]

A lot learned in six minutes! Thanks!

[@benji1583]

This was very informative thank you guys !!

[@jjyemg2397]

Trethewey is hands down the greatest. Been watching him since the 80's. Iron is less noble than copper so the recirculating iron thru the homeowners HW pipe is NOT the direct reason the copper corroded. It's the iron laying down on the copper pipe and the copper corrosion is from under deposit corrosion. Dissimilar metals in an electrolyte, release of hydrogen ions and a localized pH depression that created the pit.

[@manla8397]

This actually opened my eyes

[@augnkn93043]

Informative to see pipes cut open like that. Well done.

[@grillo7196]

This show is awesome! Good information guy’s.

[@johnbecich9540]

THIS is Richard Trethewey's finest hour, and that is saying A LOT.

[@ChrisRenzi65]

Most informative video I have ever seen about hot water tanks!!!! Thank you so much!!

[@jayyoutube8790]

Just had this same problem fixed the other day... Amazing

[@thaitichi]

What a great video!

[@tgamirov]

This is an outstanding video. Thank you very much.

[@operationhotshotinc.6887]

i learned something.. thanks!