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Old 03-13-2010, 01:16 PM   #1
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can stack vent turn 90 degrees?


i need a stack vent for 1st floor of a 3storey building. cannot reach existing stack vent for upper floors, and the stack vent has to go out through a side wall.

can i bring the vent up to ceiling of 1st floor and then turn 90 degrees to side wall to go out to open air?

thx

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Old 03-14-2010, 08:28 AM   #2
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can stack vent turn 90 degrees?


yes, if it's only a vent (no fixtures above offset) but when you get outside you still need to run up to 18" above roof line

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Old 03-15-2010, 09:24 AM   #3
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can stack vent turn 90 degrees?


so i have the first vertical vent section right above where i connect the vent to the drain system, then after a 20ft horizontal run, i have another vertical section of 2 floors up.

Now what do i consider to be the main vent's location? where the vent connects to the drain or where the vent go 2 floors up till above the roof?
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Old 03-15-2010, 05:24 PM   #4
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can stack vent turn 90 degrees?


why do you need to know that? your main vent would be the continuation up of the stack that you are connecting to. The new vent would be considered a branch vent. what are you tying into it? if it's only a single fixture it probably doesn't have to remain full size
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Old 03-15-2010, 08:20 PM   #5
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can stack vent turn 90 degrees?


my situation is: it is a 3 storey building. 2nd, and 3rd floor are independent apartments, i believe the main vent over stack is somewhere in 3rd floor apartment. As it is old building, it only has the main vent above the stack and 2nd floor uses wet venting.


i am totally redoing the 1st floor, my question is about the venting for all the drains on 1st floor so it would be the vent for 1st floor. i probably should not be called as "main vent", based on the reaction, i guess "main vent" is for the whole stack.

since i cannot connect to the main vent over the stack (somewhere in 3rd floor).i am sending the vent from the basement to the ceiling of 1st floor then.. what do i do? take it out to the back wall and turn again to go up till the roof?

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Old 03-16-2010, 05:25 AM   #6
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can stack vent turn 90 degrees?


correct
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Old 03-16-2010, 07:45 AM   #7
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can stack vent turn 90 degrees?


then when i calcuate critical distances for 1st floor drains, i from the drain to the vent from basement to ceiling? or to the main vent for the stack?

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