john330
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I am adding an upstairs bathroom and have some questions about how I can vent the system.
The flow of the drainage is sink->shower->toilet. The sink drains into 1.5" pipe which then changes into a 2" pipe before the shower trap. The shower drains into the 2" pipe which then changes to a 3" pipe before the toilet drains into the 3". The drain then continues to flow down to the crawlspace and then on to the septic tank.
My questions are 1) Will this drain layout work? and 2) How can I vent the shower and toilet together? (The sink will be vented by itself to the attic and tied into the shower/toilet vent before exiting the roof).
Please note - in all pictures, the sink and it's drain are not shown, but are upstream of the shower.
Can I vent the shower/toilet after the toilet as in "Figure 1"
or
Should I vent the shower and wet vent the toilet to the shower vent as in "Figure 2"?
or
Should I vent the toilet and tie in the sink/shower drain downstream of the toilet vent as in Figure 3?
The flow of the drainage is sink->shower->toilet. The sink drains into 1.5" pipe which then changes into a 2" pipe before the shower trap. The shower drains into the 2" pipe which then changes to a 3" pipe before the toilet drains into the 3". The drain then continues to flow down to the crawlspace and then on to the septic tank.
My questions are 1) Will this drain layout work? and 2) How can I vent the shower and toilet together? (The sink will be vented by itself to the attic and tied into the shower/toilet vent before exiting the roof).
Please note - in all pictures, the sink and it's drain are not shown, but are upstream of the shower.
Can I vent the shower/toilet after the toilet as in "Figure 1"
or
Should I vent the shower and wet vent the toilet to the shower vent as in "Figure 2"?
or
Should I vent the toilet and tie in the sink/shower drain downstream of the toilet vent as in Figure 3?