Cutting old galvanized to couple to new brass or PVC P trap. Nervous.

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Modulerics

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You may be right. It could be a threaded connection. Plumbing is fun.

I started in new construction. Thought I knew a bunch. Then service work and dealing with old stuff I had never seen before. Always something new.
Always something to learn. I'm going to try and untreated it later. Thankfully if I have to break more slab back I won't end up in the kitchen and will be relieved to get rid of the galvanized.
 

Reach4

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Rubber would not attract a small magnet.
 

Jeff H Young

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I actually haven't done tons of service work especially on older homes to bet on whether that's threaded or not . on this I could see it being lead and oakum or possibly threaded .
That is optimistic unscrewing the gal and screwing in a PVC w adapter glued on , sure worth a try worse case you chip a little more out.
 

Mr tee

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I am pretty sure it is threaded in. It would not be a 1 1/2" hub (don't think there is such a thing) and in order to hook 1 1/2" gal to a 2" hub a 1 1/2" threaded coupling would have been caulked in and that is clearly not what is shown in the photo.
 

Modulerics

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I am pretty sure it is threaded in. It would not be a 1 1/2" hub (don't think there is such a thing) and in order to hook 1 1/2" gal to a 2" hub a 1 1/2" threaded coupling would have been caulked in and that is clearly not what is shown in the photo.
Yeah I measured the pipe and it's 2" I didn't realize the trap is a 2 x 1 1/2. I'm going to chip away a lil more concrete so I can see the hub face. Hopefully unscrew the pipe, clean the thread up and the get a threaded 2" pvc piece in there. Then a bushing to 1 1/2 and then some tube and a p trap.
 

Mr tee

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The galvanized pipe is 1 1/2" not 2". The name of that size refers to the approximate ID, not the OD. The tubular tub drain is also called 1 1/2" but that is a tube size that goes by the OD.
 

Jeff H Young

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Yep 1 1/2inch I don't recall seeing 1 1/2" hub but seen gal leaded in to santees above grade coulda been 2 inch and bigger good point Mr Tee! I'd be a little nervous twisting on that rust pile. but gotta do something
 

Modulerics

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Alright. I can not get this piece of galvanized to unscrew. I cut off the p trap and am trying to spin it from that end. All I've accomplished is crushing the pipe. I've used penetrant and heat but it remains stuck.

What's the next best approach to remove this? Should I cut it closer, then make a couple cuts along the axis so I have a tab and bend that down? Kind of afraid it will all just break right at the hub and be stuck in there.

Apologies for foam at the end of pipe just easiest way to plug it for right now.

20221023_140935_copy_1612x1209.jpg
20221023_140928_copy_1612x1209.jpg
 

Modulerics

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The galvanized pipe is 1 1/2" not 2". The name of that size refers to the approximate ID, not the OD. The tubular tub drain is also called 1 1/2" but that is a tube size that goes by the OD.
Oh I'm nervous alright. Wrench on it just crushed it.
 

Terry

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I would put a torch on the fitting, hoping to expand it by heat, keeping the pipe as cool as you can.
Fitting needs to expand, and heat can do that. Sorry that this job is so difficult. It's scary for the plumbers too.
 

Modulerics

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I would put a torch on the fitting, hoping to expand it by heat, keeping the pipe as cool as you can.
Fitting needs to expand, and heat can do that. Sorry that this job is so difficult. It's scary for the plumbers too.
I'll give that a try in a bit. Kind of want to resort to cutting it but obviously better if I don't.
 

Modulerics

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Ok now I think I have a bigger problem. That fitting the pipe is connected too is now wobbling and moving and it wasn't before.
 

Terry

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The fitting is now loose? Darn. You may need to break some concrete to see what is happening with that fitting, and perhaps replace that too.
 

Modulerics

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The fitting is now loose? Darn. You may need to break some concrete to see what is happening with that fitting, and perhaps replace that too.
Yeah going to have someone come out and do a camera inspection. Will report back later this week
 

Jeff H Young

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Is there a santee right there ? why do a camera inspection you haven't even got the pipe out yet . might have to chip out some more and remove that tee put a new tee in try flushing water down if no leaks then camera
 

John Gayewski

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There's a good chance you won't be able to get it unthreaded. Especially if your crushing the pipe while trying. Probably wanna just find a way to get on something better.
 

Jeff H Young

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I might not try unscrewing at this point it might twist fitting and bust more pipe
 

Modulerics

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Is there a santee right there ? why do a camera inspection you haven't even got the pipe out yet . might have to chip out some more and remove that tee put a new tee in try flushing water down if no leaks then camera
Not sure what's right there. Guess I'll chip away at the slab to see what I can reveal. Figured I'd just call in a local sewer specialist and see of they'd dealt w anything like this before.

Here's a pic of what the inside of the pipe looked like BTW for your pleasure.

20221023_174237_copy_1612x1209.jpg
 

Modulerics

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There's a good chance you won't be able to get it unthreaded. Especially if your crushing the pipe while trying. Probably wanna just find a way to get on something better.
Yeah now with the hub it's in moving around not sure where better is. Guess it's more slab removal later this week.
 
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