PA250F
New Member
Replumbing and laundry room which last done in the 80s ish (1950s rancher). Mostly to deal with the electrical outlet in the laundry drain box (not kidding… that has to go), and the polybutylene supplies. Opened up the wall to find a nice and rusty drum trap and decided it was time to fix it all best as possible.
Currently the sink and laundry standpipe both go down to the main drain line in the basement. Neither are vented. Never had a problem with either, but figured I’d make some improvements while I’m at it. I’ve seen a diagram on here a lot with the laundry and sink both going into a single vertical then the main line but hesitate to do that because all the lines are 1-1/2, including the main (it eventually bumps up to 2” and then 3”) about 20 ft later. House is a single floor rancher with a single main line, vented at the start and right at the end, no other vents on any fixtures between (will get to little by little, currently no known problems).
Spatial constraints abound, specifically the sink being past the vent (as indicated above, that vent is for the whole rest of the house, so I’m very against draining anything down it). But also some electrical conduit in the wall that feeds the garage.
So the question is this:
-I think it’s correct to just leave both dedicated drains down to the main and add a vent up that runs across to both? Is there anything wrong with that sketch marked “ideal” (new stuff in blue)?
-Is it okay to not add the vent for the laundry standpipe? It’s going to be a thorough pain in the rear to do (on the scale of moving an entire electrical subpanel…). My understanding is that the standpipe is kind of “self venting” because it’s open to the air? This is in the sketch labeled “proposed”.
Note: Those aren’t extra traps in the sink line, just drawing like an electrical schematic and indicating that it runs separate to the laundry stand and vent. It goofily runs in front of the wall…
Currently the sink and laundry standpipe both go down to the main drain line in the basement. Neither are vented. Never had a problem with either, but figured I’d make some improvements while I’m at it. I’ve seen a diagram on here a lot with the laundry and sink both going into a single vertical then the main line but hesitate to do that because all the lines are 1-1/2, including the main (it eventually bumps up to 2” and then 3”) about 20 ft later. House is a single floor rancher with a single main line, vented at the start and right at the end, no other vents on any fixtures between (will get to little by little, currently no known problems).
Spatial constraints abound, specifically the sink being past the vent (as indicated above, that vent is for the whole rest of the house, so I’m very against draining anything down it). But also some electrical conduit in the wall that feeds the garage.
So the question is this:
-I think it’s correct to just leave both dedicated drains down to the main and add a vent up that runs across to both? Is there anything wrong with that sketch marked “ideal” (new stuff in blue)?
-Is it okay to not add the vent for the laundry standpipe? It’s going to be a thorough pain in the rear to do (on the scale of moving an entire electrical subpanel…). My understanding is that the standpipe is kind of “self venting” because it’s open to the air? This is in the sketch labeled “proposed”.
Note: Those aren’t extra traps in the sink line, just drawing like an electrical schematic and indicating that it runs separate to the laundry stand and vent. It goofily runs in front of the wall…
