Adding half bath

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barryw

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• Mar 13, 2007

• #1

Hi. I plan to replace all of the galvanized pipes in my house and add a half bath on the second floor.
I have attached a diagram of the existing drains and vents as well as my proposed second floor half bath. I want to run a 3" drain for a second floor toilet and sink and tie the vent into the existing 4" stack. Will this work?

To clarify, the bath tub and sink are vented through a 'common vent?',
the basement sink vent also vents a basement toilet not on the diagram.

I didn't draw to scale or consider connectors, I am only concerned with the flow at this point.
Thank You!

 

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Randyj

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• Mar 13, 2007

• #2

Looks okay to me... I would use wye's rather than tees on all the drains.

 

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barryw

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• Mar 16, 2007

• #3

Great thank you.
My next task is to figure out the proper fittings to use.

 

Geniescience

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• Mar 16, 2007

• #4

use tee's on the two new ones, as you have shown. About the rest of the diagram: no comment.

david

 

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barryw

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• Mar 18, 2007

• #5

Is it possible to drain the new second floor toilet into the existing 4" stack and revent all fixtures below it - as opposed to running a new 3" stack and tying into the base of the main stack.

 

Geniescience

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• Mar 18, 2007

• #6

Yes.

Draw the whole diagram again, with real Tee's and Wye's. The way it looks now is not good at all. Very bad.

david

 

Markts30

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• Mar 18, 2007

• #7

quick rendering...

Here is a quick rendering...
a few views - one of al pipe and then broken down by floor as the whole think is confusing...

 

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barryw

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• Mar 22, 2007

• #8

Great thanks for the pictures.
I think I am going to have to just add a three inch DWV from the second floor. I own a cape cod/bungalow style house so the entire upstairs is basically open, which leaves very few areas to hide additional vent pipes.
So I am going to redraw everything with a couple of changes..thanks again.

 

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barryw

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• Mar 24, 2007

• #9

Ok here is my latest diagram.
Its not to scale so it looks spread out, but that was the only way to fit everything in.
I plan to replace everything with PVC except for the basement sink/basement toilet vent and drain.
I plan to use 2" drains for the first floor and 1.5" for second floor LAV; 2" vents.
Hopefully most of my connections are correct.
Thanks,
Barry