hefty4690
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Another venting question. I wish I had a picture for you but I hope my description is enough. Here's the situation. I am installing a bathroom in my basement. I have removed the old floor drain in the corner that fed via a short section of clay pipe to the 4" line to the aeration system outside. The 4" line enters under the footer and immediately connects to a 4x4x2 wye with 45 facing up to serve as the drain for a sink. The sink is about 3' from this drain but I will probably vent it separately above the trap.
Extending straight out from the 4x4x2 wye is the toilet location, about 18" from hub of wye to center of closet flange. I have sized down to 3" out of the fitting with a bushing. If this were all then I could use the sink drain as a wet vent, but there is also a shower next in line, then a drain from the upstairs kitchen, then the washing machine standpipe, the a floor drain. All of the fixtures from the shower to the floor drain will have their own vents connected in the wall 6" above the bathroom sink and a single 2" vent will rise to the first floor and connect in to the kitchen vent pipe 6" above the sink. My question is what is the best way to branch off of the drain for these additional fixtures. Here are the options I am considering:
1) between first wye fitting for sink drain and closet bend I install a wye fitting leading to the other drain locations. This would leave me no room to separately vent the toilet. The sink would be the wet vent but my concern is the other wye in between. Would this be allowed. I could install a vent tee turned up after the second wye fitting for the additional drains but it seems that this would be no better than using the sink drain as a wet vent.
2) instead of a closet bend for the toilet I install a long sweep wye. I have plenty of depth for this. This would allow for a vent tee in between the sink drain wye and the toilet. I would then continue on to the other fixtures venting each as noted above.
It seems ideal to me to vent each fixture arm between the trap and the connection to the main line but space just doesn't permit. Sorry to be so long winded. Someday I'll learn to post drawings.
Scott
Extending straight out from the 4x4x2 wye is the toilet location, about 18" from hub of wye to center of closet flange. I have sized down to 3" out of the fitting with a bushing. If this were all then I could use the sink drain as a wet vent, but there is also a shower next in line, then a drain from the upstairs kitchen, then the washing machine standpipe, the a floor drain. All of the fixtures from the shower to the floor drain will have their own vents connected in the wall 6" above the bathroom sink and a single 2" vent will rise to the first floor and connect in to the kitchen vent pipe 6" above the sink. My question is what is the best way to branch off of the drain for these additional fixtures. Here are the options I am considering:
1) between first wye fitting for sink drain and closet bend I install a wye fitting leading to the other drain locations. This would leave me no room to separately vent the toilet. The sink would be the wet vent but my concern is the other wye in between. Would this be allowed. I could install a vent tee turned up after the second wye fitting for the additional drains but it seems that this would be no better than using the sink drain as a wet vent.
2) instead of a closet bend for the toilet I install a long sweep wye. I have plenty of depth for this. This would allow for a vent tee in between the sink drain wye and the toilet. I would then continue on to the other fixtures venting each as noted above.
It seems ideal to me to vent each fixture arm between the trap and the connection to the main line but space just doesn't permit. Sorry to be so long winded. Someday I'll learn to post drawings.
Scott