Moving basement Washing Machine

[SwiftMKIII]

I am trying to move a washing machine, which will effectively move the machine from one waste stack to another.

1. How to vent the washing machine drain?

• Air Admittance Valve - I understand this doesn't work with pressurized output, like from a washing machine
• Tie into current vent - This vent is 29 linear feet away, around the perimeter of the basement walls (see floor plan sketch), and vent into a separate waste stack (though I don't think that matters)
• Other Vent - I have looked into wet vents, loop vents, stack vents, etc.; I have no idea how to tie any of these into the existing stack

2. Washing machine drain

• Can I tie the washing machine drain, with P-Trap and previously discussed vent, in above the clean-out in the wast stack? This drain will travel about 4', under the stairs in the basement, and tie into the existing waste stack (see Proposed Change).

I welcome any recommendations, as the layout of my basement does not allow for finishing with the washer and dryer in their current location. I am intending to move the washer and dryer to a "common" area beside the stairs, and put a bedroom where the current laundry is located.

For future proofing, I am also interested in putting a full bath in the area above the stack I am trying to tie into (beside the stairs). The rough in is there, but I will need some vents tied in when that work is done as well. I assume the bathroom drain vents will tie in similarly to the washing machine vent?

Thanks for any advice you can offer. I am willing to provide additional sketches or photographs of the area if that helps with the advice.

 

[SwiftMKIII]

So, After doing event more investigation, I have found that the rough-ins for the basement bathroom has a 2" DWV pipe that might be plumbed as a vent. I went through all of the sinks, tubs, and toilets and none of them drain through this pipe. The picture below is a sketch the layout of the rough-ins.

The Sink drain is a 2" pipe that enters the foundation below, and goes up through the ceiling above. The picture below is an elevation sketch, noting the sink drain. Would this rough in include a vent, and would this be it, as none of the house sinks, tubs, toilets drain down that pipe?

If this is a drain, it is about 16 linear feet from the proposed washing machine location in the previous post. Can I use this vent for the washer? The house is 2 levels above ground (10' ceilings), and the basement has 8' ceilings.

 

[Sponsor]

 

[Terry]

If you move the washer near the stairs and tie into the 3", you can then vent the washer over to the bathroom vent.

 

[SwiftMKIII]

Terry, Thanks for the response!

Just to verify, 16' vent run is not too long?
Anything to be aware of when tying into the 3" near the stairs.

• 18"-42" standpipe
• 2" x 1 1/2" x 2" tee within 5" of standpipe/P-Trap
• 1/4" or more slope out to the 3"
• Sanitary Tee into the 3"
  • Can I use a long sweep combo?
• 1 1/2" vent from above the 2" x 1 1/2" x 2" Tee
• 1/4" or more slope on the vent
  • Toward or away from the washer?

 

[Terry]

If the horizontal is more that one third the vertical on the vent, they like to see it up one size.
Coming off the 3" either a santee or a combo, and the vent on the arm over to the p-trap and standpipe if it's on it's back is a combo. If it's on the vertical, a santee.

 

[SwiftMKIII]

Got it. Thanks again. Dropped a tip in your tip jar.