Roughing in toilets

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phishfood

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I hate no caulk, no glue shower drains. Lots of leaking problems from them.
 

frodo

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right here right now, over there later on.
I had to put in 250 of them, [ dormitories] after a few leaks
we coated the pvc pipe with silicone, smeared it on with a finger like pipe dope
then dropped the rubber in the hole and tightened them up
we stopped having drippers
 

edfiero

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Up to three toilets combined can use a 3" drain line. There is absolutely no need for 4".
Frodo, what program/app did you use for those sketches? Nice job!
Not to hijack, but I just moved into a new construction single family home which uses 3" waste lines. The builder grade toilets are always getting clogged. Never had a problem at my old house which used 4" lines and 1.6 gpf toilets. I wanted to chalk up the problem in the new house to the 3" lines. You telling me its the toilets???
 

Mikey

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I'd bet on the toilets as well. My 1992 home uses 3" waste from the terlets to the 4" stack. Toto Drakes, never a problem.
 

breplum

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Check the MaP test results for the particular WC.
If they are rated above 900 grams, then they should not be a problem.
There are still many 1.28 gpf WCs that flush 1,000.
3" waste lines are not a issue.
 

branimal

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@frodo
I changed the location of my washing machine to create a better bedroom layout.

I'd like to drain the washing machine along the wall (blue line) and then across the building (red line) to the soil stack. The red line will also drain the kitchen sink.

Can I join the kitchen sink and washing machine with a double quarter bend? Or do i run the risk of washing machine bubbles running up to the sink?

Both fixtures will be vented at their respective locations.

Thanks
 

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