Tub Drain Box Out

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Brdkey

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I currently have a house in South Carolina with a slab foundation. I am going to replace my tub/surround soon. My house was built in the 1980s. Is it common for the tub drain/overflow pipe to be slabbed into the concrete or a acess left open for future repair/replacement? I've looked everywhere online and can't find this info. I guess they are called box outs, is it code or common to have one?
 
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Diehard

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Although box outs are relatively common today, I don't see them as being required in my plumbing code.
But either way, I don't think you'll know what to expect until you pull the tub.
Even if they didn't use a box out when pouring the slab, there's a chance they broke open an area of the slab for final connection.
Which you may have to do depending on what you find.
 

Brdkey

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Although box outs are relatively common today, I don't see them as being required in my plumbing code.
But either way, I don't think you'll know what to expect until you pull the tub.
Even if they didn't use a box out when pouring the slab, there's a chance they broke open an area of the slab for final connection.
Which you may have to do depending on what you find.
Can i access it from the back wall? How hard would that be to knock out the concrete?
 

Brdkey

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Okay so I ended up tearing out a rectangle of sheetrock directly behind my tub. This is what I found. It appears to be in the floor. Any suggestions?
 

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Brdkey

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So Ripping the drywall out a little further it's definitely concreted it in. What are the chances of being able to keep that pipe where it is and everything lining up on the new tub?
 

FishScreener

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If you go back in with the same width of unit it will line up. They are made in the center of the width. If it doesn’t you could probably get a pair of 11.25 degree angles and offset it.
 

Brdkey

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Yeah I am getting the same width tub. What about the distance from the frame backwards? Would that be the same? Another thing I have to do is the Overflow is going to be taller but that's the least of my concerns.
 

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