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JDCam

09:51AM | 12/19/02
Member Since: 12/18/02
2 lifetime posts
Bvplumbing
I am doing renovations to my basement that includes relocating my laundry

The new location is not practical to reach either of the two waste stacks. My intent is go through the floor into the main, as I would with a basement toilet.

My concern is with the venting. By taping into the main (horizontal) I am not geting the benefit of venting that taping into a stack (vertical) would give.

I can't see any way of adding venting other than going into the basement ceiling, than across into an existing stack. would this work ? is it required ?? is there an better way ??

The location is about 12 away from each of the exisiting stacks, and directly over the main.


raymondvinzant

01:33PM | 12/19/02
Member Since: 11/17/02
50 lifetime posts
When you tie a drain into the stack, you have to make sure your tieing it into a drain first. Even if you tie it into a drain, every fixture has to have its own vent. A vent prevents the trap on the fixture from being syphoned every time the fixture is used. A vent should rise up from the vertical or horizontal drain at no less than a 45 degree it can then run a fairly long distance horizontally (6" higher than the fixture). If you have other vents in the basement, (laundry tub or bathroom) you can tie the vent into these vents. All vents eventually tie into the main vent and exit the roof, pretty much an upsided down mirror of the drain system, only smaller. Vents generally have to run horizontally pitching slightly up hill so condensation can run back to the fixture drain. Once a vent gets higher than the fixture it can run horizontally always up, but it cannot turn down again unless it ties into another vent. You cannot create a situation in a vent system where water can gather and block off the vent, this is called trapping the vent. A no no.
Good Luck
Raymond
Plumbing Prof
Anoka Hennipin Tech College
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