Basement Laundry and sink remodel

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Doug H

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Have an old house, galvanized pipe drains and vents. Redoing laundry area where vent extends straight up from near floor drain across window. Framed wall and want to bring to 2" drain code, add standpipe for washer and move laundry tub to area where old vent extends. See pic.

Will the assembly muddled together in pvc work for sink, washer, and venting (increased to 1-1/2")?
Do I need that vent at bottom at 45 since sink right over this? Does it help?
The shower drain is within 2 feet of this drain to left and may be using this vent, tho not sure in cement.

Thanks.
 

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Tuttles Revenge

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Yes. You're intending the 2" to connect to the cast iron hub.. branch off the WYE for another fixture (clothes washer?) and drain a sink into the san tee.. That works. The vents can combine once they reach 6" above the flood level of the fixture (if your sink is 36" high, your vents can combine at 42")

washer_rough_b.jpg
 

Reach4

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I think a sketch will describe your proposal better. You don't show the shower p-trap.

MN uses IPC, so it is sometimes more permissive.

Do I need that vent at bottom at 45 since sink right over this? Does it help?
No. I don't see how that vent on a 45 below the santee helps. You need a vent for the lavatory from above for the santee. I think you could bring the drainage from the standpipe down to a 2-inch 45 below the santee after the standpipe trap arm has been vented.

To help running the vent santee, note that 45 degrees is considered vertical for this purpose. So maybe a 45 atop the santee, and when high enough, join the standpipe vent.
 
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Doug H

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Yes. You're intending the 2" to connect to the cast iron hub.. branch off the WYE for another fixture (clothes washer?) and drain a sink into the san tee.. That works. The vents can combine once they reach 6" above the flood level of the fixture (if your sink is 36" high, your vents can combine at 42")

washer_rough_b.jpg
Thank you. I guess the only concern to get like this pic is that the drain into concrete is outside the wall (about 12") close to the floor drain. I think it may vent that though call to inspector seemed to indicate they treat that opening as a drain. So do I need 45 degree from the drain in floor up to inside wall or can that be 90 sweeps if is a drain? I was thinking to 45 if space allows and add "wye" low to vent just in case more needed for floor drain? Maybe no sense for that.
 

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Doug H

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I think a sketch will describe your proposal better. You don't show the shower p-trap.

MN uses IPC, so it is sometimes more permissive.


No. I don't see how that vent on a 45 below the santee helps. You need a vent for the lavatory from above for the santee. I think you could bring the drainage from the standpipe down to a 2-inch 45 below the santee after the standpipe trap arm has been vented.

To help running the vent santee, note that 45 degrees is considered vertical for this purpose. So maybe a 45 atop the santee, and when high enough, join the standpipe vent.


See pic and questions attached. I also replied to other post by another person.

Added pic of what I did... taking it on inspectors word on phone call that the pipe out of cement is a drain. Figured then could run horizontal to it. Needed to use santee in as not enough vertical to do all...It is horizontal to vertical.
Thoughts?
P.S. I do have vents to do, I know.
 

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