Hi,

I am installing a new washer dryer. When I opened up the walls there was already supply and drainage lines (opposite site of wall has bathroom vanity sink)

I have loosely laid out the new supply and drainage lines for the washer.

Any issues you can see that should be corrected?
The Drainage line has a vertical upwards bend midway, is that an issue?

Thanks

Hi there, Badboi,

There is a issue with drain. The drain in 2nd photo needs to go gradually up from the point of connection (on the right side) all the way, across the wall, up to the trap for washer, maintaning 1/4" per foot slope. Also, don't understand that strange 45 degree fittings installed in the middle of the run. Cut them out and connect with straight piece of pipe. Furthermore. You need vent for your new washer line. You can do either AAV ( air admitance vent ) or Tee off form the horizontal section and connect above flood lever with existing vent on the right (copper ), not lower than 48" above the floor. Water looks fine.

Back to you

Milo

Thanks Milo,Due to space constraints I think an AAV would be better. Where would you locate that and how high does it have to branch up?What slope requirement is recommended for the Washer Drain?Thanks so Much

AAV should be a high as possible. In your situation, I would put it from behind ( pic.2 ), anywhere inside that wall - but no more than 4' away from the trap. Vent should be 1 1/2" in size, up the wall, and terminated below the ceiling. There, i would install a small, 8"x 8" access door ( aav vent has to have access for service ) or "fake" A/C register.

Slope has to be 1/4" per foot

Hope that helps

Milo

PS: Just for my information - what is that horizontal copper pipe on the right ? What plumbing fixture is it attached to ?

Thanks for the Info again.

1) I think then I will extend the AAV past the ceiling and into the Attic, above the top plate. Would that be acceptable? I will locate it where you drew the first arrow head on the pic 2.

2) There is an bend that is required in the drain line if I do a strait run from the trap on the left from the Washer. The washer drain is located on the outside of the stud where but it will have to be connected back the drain in the floor which is at the center of the stud on the far right. That should be acceptable?

3) The horizontal pipe is connected to a vanity bathroom sink on the other side of the wall

During installation, drain has preference over water lines. Thus, we always do drains first, then water plumbing. That way we don't end up with situation like presented here.

I would run the drain above water lines, as is the red line. Yes, it is fine to cut-in the "T" for vent in the location you have indicated in your previous response. If you go with vent all the way to the attic, you will have to reconnect it with one of the existing vents in the attic area. Otherwise, you will be venting sewer gases into the attic - which is not only against the Code, it is also a health hazard

Hope that explains

Milo

Okay, that helps even more.

So, If the AAV is located concealed in a non-insulated wall, all it needs is an access door? But if its in a non-occupied attic, it will require to be connected back to the main vent stack?

Thanks for the assistance.

Ok, let me explain the confusion:

Once you are in the attic, you don't need AAV because you are already in the attic, in proximity of existing vent. So, connecting it the right way is a snap

If you leave it inside the wall, you will need an access to it as AAV is a mechanical device and needs an access door.

You could install AAV vent in the attic. But, why not connecting it the "right" way ?

Hope that explains

Milo

Don't close that large junction box inside the finished wall, use an access panel. Also, that red cable going down from the jbox looks pretty bad and the orange cable needs a strain relief, looks like it was installed for NM conduit.