zanman
New Member
Hi All, first time poster here. Hoping to get some feedback on the best way to drain a washing machine and laundry sink i am adding in the basement of a late-70's home. I have been reading forums all day, but haven't quite been able to find a direct answer to my problem.
I believe this user has a very similar situation
I have the option of draining either to the 3" main that services the upstairs (2x full bathrooms), or a 2" that just services the kitchen sink+dishwasher (see photos below). Venting is obviously the challenge as both lines service multiple fixtures upstream, and venting to the attic would require opening walls on the main floor at a minimum.
Option 1: Plan would be to put washer/sink next to water heater, run 2" pipe behind water heater (there is space)
Option 2: Ignore drywall, basement was previously finished but I am demo'ing right now.
I believe this is a good example of how to "properly" handle this situation, the only difference is that in my case, the "vent" in the top-right-corner would be actual be an existing drain line.
My Questions are:
1. Which route do you think is the best to use (option 1 or 2). Would it be advantageous to send the washer to one and the sink to the other? (they are both located fairly close to where the washer/dryer need to go).
2. Is it possible that I may not need to vent? I have heard of 'wet venting', but done have a good understanding of when you can/can't get away with it. In this case, all upstream fixtures are properly vented to the roof.
3. If not, what would you recommend as an alternative? I've created a crude schematic of how this might be done using an AAV. Please critique, your feedback is appreciated.
I believe this user has a very similar situation
I have the option of draining either to the 3" main that services the upstairs (2x full bathrooms), or a 2" that just services the kitchen sink+dishwasher (see photos below). Venting is obviously the challenge as both lines service multiple fixtures upstream, and venting to the attic would require opening walls on the main floor at a minimum.
Option 1: Plan would be to put washer/sink next to water heater, run 2" pipe behind water heater (there is space)
Option 2: Ignore drywall, basement was previously finished but I am demo'ing right now.
I believe this is a good example of how to "properly" handle this situation, the only difference is that in my case, the "vent" in the top-right-corner would be actual be an existing drain line.
My Questions are:
1. Which route do you think is the best to use (option 1 or 2). Would it be advantageous to send the washer to one and the sink to the other? (they are both located fairly close to where the washer/dryer need to go).
2. Is it possible that I may not need to vent? I have heard of 'wet venting', but done have a good understanding of when you can/can't get away with it. In this case, all upstream fixtures are properly vented to the roof.
3. If not, what would you recommend as an alternative? I've created a crude schematic of how this might be done using an AAV. Please critique, your feedback is appreciated.