Redoing bathroom. Have a galvanized vent line that’s corroded.
The down pipe above the sink trap is corroded behind it about half way down and actually broken off. Should I just cut it and cap it at the other down pipe, or should I cut it out and and join it with rubber couplings and PVC? If rubber coupling, where should I cut and join?
I would absolutely, 100% replace the tee downward with PVC. Galvanized drain pipe is definitely beyond it's life expectancy and is either rotting through at this point, or so gunked up that it will cause slow drains forever.
Whether you replace the vent portion is really up to you. If the roof is just above, I would probably replace it.
If you do decide to keep the galvanized vent, make sure you support it well before you cut it. It's pretty heavy and will drop down once cut. Also, once it's all re-connected, check the boot on the roof as it may need some extra roofing cement or some fixing since the pipe may move a bit and you don't want to get an unexpected leak.
The tee down? The only tee I see is at the sink drain. Can you draw on the pic where I should cut and replace?
I’m three floors below the roof. Had boot replaced last year. The stack is about five feet to the left, but don’t have access to it without an incredible amount of demolition.
I don't know. I read your description three times and I'm still confused.
The pipe above the tee is strictly the vent. Where the red arrow is shows tremendous down pressure based on the weight of the galvanized pipe. You would have to support the pipe at that point to keep it from coming down the wall.
Yellow arrow. In the back below the round birthmark on front is where the crack is. Goes about halfway down the pipe. You can actually see it’s dislodged from the elbow.
The galvanized makes another 90 about three feet up on the right side where it connects into the stack. Am I keeping the galvanized vent and patching it with PVC, or am I adding a PVC vent that'll be inside the vanity? If anybody is confused, the crack is right where PJMax drew the yellow line, but in the back. The top of that pipe is dislodged/corroded from the elbow also.
I have a house built in 1955 and the water lines are in or under the slab. There is a poured carport next to the back door with a 2’ x 2’ opening filled with gravel . Would this be where the water lines enter the house or would it be for something else ? Thanks
Hi --
I am in the process of fixing up an old house I bought and have run into a minor issue with some old pipes in the laundry room. The old laundry hook ups were leaking so I am replacing them with new valves at the moment. When removing one of the valves I noticed that corrosion has caused the pipe threads to fuse with the main water pipe -- pictured here:
[img]https://cimg3.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/image2_1__8f814781d73fcdc9c481b756d6d9771522204b68.jpeg[/img]
[img]https://cimg5.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/image3_7010e85a453319e029a9c5c59ac47122a6bd1d2b.jpeg[/img]
I've tried a few tools to remove the small portion of the thread that is fused with the pipe, but nothing is working. I have yet to try a pipe nipple extractor tool but am thinking that might not even do the trick due to the shape the pipe is in (it's in bad shape).
Ideally, I want to make sure the threads are all clear before I insert a new pipe/valve and hook up the new laundry machines. I am worried also that in general these pipes are in really bad shape beyond just the issue highlighted above.
Looking for expert advice on if I should continue to try and extract and clear the corroded portion of the pipe with a nipple extractor and move forward with the small project myself or if this might just need the expert eyes from a plumber or professional.
Any advice is appreciated and I can provide more answers/details as needed here!
Thanks!
01-24-21, 07:30 AM
