I am renovating my bathroom. The old bathtub drain is (2). I want to move that drain to (1) for a better location for the shower. The question is: what do I have to do?

The old drain has a P trap and then goes directly into that vertical pipe below the slab. I assume this is a wet drain.

The distance from (2-old drain) to (3-vertical pipe) is about 30 inches. The distance from (1-new drain) to (3-vertical pipe) is about 72 inches.

--Can I just connect the new drain to the old drain pipe (assuming proper slope) and have it be ok? Or is the 6 foot distance too far to use the wet vent?

--I'm assuming that I can use that pipe for drainage, no problem. It's the venting that I'm worried about. If I can't just connect the pipes because 6 feet is too long, how else do I vent this?

This is a load bearing wall, I believe. I only mention that because that limits the defects I can create in the studs.

Not sure what the plan is but you must back vent the lav on left
I guess my isp is not top notch I just saw the lettered description above the picture
A 6’ trap arm is just fine with a 2” drain with a 2” trap
You will still need to vent the sink on the left via a back vent or mechanical vent



Edited 1 times.

a 2 inch trap can be 6 feet from its vent.
looks like you'll be fine .

Exce';t he sated that the P trap goes into a vertical pipe which could indicate it is an "S" trap.

i'm thinking the shower drain goes into the vertical 2 inch lav drain. this would make the shower wet vented thru the lav.

The lav drain closer to the side wall is a sanitary tee sitting horizontally which is non compliant.

Also the lav drain further away is not vented properly. It needs to have its own vent branch, or you use only one trap arm, which means the two sinks will need to join inside the cabinet and share a trap.