1960s Bath Remodel: Tub Drain Repositioning

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c_g_lima

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I was wondering if some of you guys could shed some light on what I am trying to do. I am remodeling a bathroom at my house which was built in the 1960s. I have everything down the studs, and the house is on a slab foundation. The old tub which I believe was considered a 32-in tub at the time had the drain at 14 1/4 inches off the back wall. The current 32-in tubs are pretty much centered at 16-in off the wall. The drain pipe and trap are the standard 1960s configuration: everything metal "glued" together with lead. The top of the trap is about 11-in below the floor.

For those of you who have dealt with a similar situation, what did you guys end up doing? Did you go as far as removing the trap or did you leave the trap alone and managed to put together a combination of fittings to offset the drain pipe coming out of the trap?
 

hj

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If you use the 'right kind" of drain/overflow system, you can use the original location, angle over to the tub drain opening and use 45s to offset the overflow to the correct location.
 

c_g_lima

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I am planning on just getting one of those overflow/drain kits that come with the trim pieces and PVC elbows. Is that what you were referring as the right kind or is there something else in the market I should use?
 

c_g_lima

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I am going to have to bug you some more since my original plan took a different route. As I was breaking up a small section of the slab to have some more room for the offsets, I noticed the vertical drain pipe attached to the cast iron trap had some very bad corrosion after 50 years. I also noticed the trap was a bit loose inside the bell of the cast iron waste line. Once I saw all that I decided to get my torch, remove the trap and clean up all the lead joint. At that point I thought about using one of those service weight gaskets/donuts, but I ran into an interesting conversation with a licensed plumber.

This plumber is someone I will be hiring to redo all the galvanized water lines with Uponor/ProPex lines. I chose to outsource that task since I am just a homeowner and not a professional plumber. This person told me I should use a no-hub coupler instead of a service weight gasket because it provides a better connection. Are those gaskets really bad? The issue here is that I will have to break up the slab some more to get past the bell to make a clean cut for the coupler.
 
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