How to Repair a Plumbing Leak in a Masonry Wall

How to locate and repair a leak buried within a concrete block wall.

[@soylientgreen8618]

I wish you had the whole repair with the cement repairs it would have been cool. Good job

[@carlgallerbuilds7990]

Yeah...I should have. The repair is nearly invisible from the outside. Thanks!

[@scasinger123]

I've had to do similar with soft lead drain lines, but FWIW, I would have soldered a new copper drain back inside again. You were right there.

[@Goldcup45]

thanks Carl. You gave me hope that a leaky cast iron pipe behind a cinderblock can be addressed.

[@danielgomes4754]

Very nice and informative.

[@PonoParadiseLiving]

Does this compromise the structure at all? Not familiar with block wall construction.

[@carlgallerbuilds7990]

This does not compromise the structure at all. There is a ton of redundancy in block construction.

[@davidburkholder7360]

I have the same pipe in my Belleair Fl home. 10 inch deep sink (stupid and overkill but "popular") and needed to lower wall drain so started to knock out but decide to get an 8 inch deep sink which makes my garbage disposal outlet now 1 inch above wall drain. Good enough I should think. Mainly I wondered if your stucco now looks orgingal? I would really wonder what a new line (and lowering of line) would cost me from a skilled plumber and THEN the repair all the way through the matching and painting of the stucco would be. I fear VERY HIGH? Maybe 15K? And I wonder if you ever got a quote on what YOU did?

[@davidfederbush4042]

I have the exact same problem. How did you cut the block and how did you patch afterwards?

[@carlgallerbuilds7990]

I used a cheap $16 masonry blad on my skillsaw. It cut like butter! I mortared in a square concrete paver that fit the hole like a glove! Mortared over the whole area and painted! Nearly invisible!

[@carlgallerbuilds7990]

The hole I cut was the exact dimensions of a concrete block paver I had laying around! I "buttered" up the hole with mortar and set the block into the hole. Once it was set, I parged a layer of mortar flush with the existing stucco finish, then painted! It came out very well. Thanks for watching and commenting!

[@johndao4660]

my leak too cooper roted i cut wall replaced 30 dallar part homedep[pot i change complte copper pipe with cpc pipe no more rotted

[@erlinavicente7411]

Have you tried JP weld?

[@carlgallerbuilds7990]

I consider JB Weld and other similar products to be "emergency" repairs. If I have an opportunity to fix something correctly, I'll always choose that route.

[@jamIam6548]

Fernco

[@craigresnick5064]

U said dog needs 2 b fed,lol

[@carlgallerbuilds7990]

Yup! That's "My Good Dog Wilson"! Check him out on Facebook reels, KZbin and TikTok

[@jamesgui3733]

I would like to see how the wall is repaired with cinder block.