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Old 04-26-2012, 03:55 PM   #1
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Toilet/shower stack layout


Remodeling a bathroom including replacing the toilet and shower. We have always had problems with the shower draining slowly. It is a shower bath so the pipe is 1 1/2. We are going to stick with a shower/bath, except upgrade the drain to 2 inch to improve draining now and preparation for shower only when we get older.

Here is how the pipes are currently layed out.

Toilet/shower stack layout-bathroom-stack.jpg

Can anybody explain why the shower drain goes across the front of the toilet drain, then enters the stack?

I would like to replumb it as shown below. Any advise?

Toilet/shower stack layout-bathroom-stack-new.jpg

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Old 04-26-2012, 09:53 PM   #2
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Toilet/shower stack layout


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Originally Posted by goosebarry View Post
Remodeling a bathroom including replacing the toilet and shower. We have always had problems with the shower draining slowly. It is a shower bath so the pipe is 1 1/2. We are going to stick with a shower/bath, except upgrade the drain to 2 inch to improve draining now and preparation for shower only when we get older.

Here is how the pipes are currently layed out.

Attachment 49774

Can anybody explain why the shower drain goes across the front of the toilet drain, then enters the stack?

I would like to replumb it as shown below. Any advise?

Attachment 49775
you da man go for it....

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Old 04-27-2012, 10:51 AM   #3
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Toilet/shower stack layout


Maybe the shower was added after the toilet?
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Old 04-27-2012, 01:33 PM   #4
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Toilet/shower stack layout


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Originally Posted by George6488 View Post
Maybe the shower was added after the toilet?
No original to the house. It was a 500 house subdivision and I figure the plumber only had Sanitary Tee with Left Inlets not Right Inlets, but when I looked more closely it currently is a 1 1/2 inch inlet over the Sanitary Tee.
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Old 04-27-2012, 01:46 PM   #5
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Toilet/shower stack layout


I dont see a problem, but in fact tis hould have been the way.
If you want a quicker drain, try using a Y instead of the Tee and a 45 and improve the elbows with 2x 45 and a little pipe between them. The less sharper the curve, the easier the water drains
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