Horizontal Wye Connection

Old 11-11-22, 03:38 PM
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Horizontal Wye Connection


I'm in the middle of a master bath remodel and I'm swapping my tub and shower. I've got my demo done and I now need to update my tub & shower DWV pipes.

Here's the layout. Blue is old pipes, orange is the new I'm installing:

My question is about the connection at the red circle. There's an existing 2" loop that comes from the old shower, close to the wall for a vent and then connected to the main drain line. I want to bring my new shower drain over and connect to it.

At that connection, can I connect horizontally or do I need to come in from above? My plan is to use a combo wye & 1/8 bend like below and lay it on its side:

Is that acceptable or do I need the inlet facing upward?
Old 11-11-22, 04:19 PM
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I'm not the pro in this area but I can tell you to make your drain plumbing is easily snake-able.
A friend of mine has a very similar setup with the big tub, shower stall and two sinks.
His bathroom is on the second floor so I can't see the plumbing in the floor.

I've had the pleasure of snaking the drain lines and have had a hard time negotiating the bends.
He keeps getting clogs in the sink to shower line. I have a feeling there may also be a burr on the pipe edge catching the hair.

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