Replacing a Bathtub with Washer and Dryer

[GoodMikeT]

I am remodeling my upstairs bath and replacing the bathtub wit a washer and dryer. I plan on using the existing tub drain to connect to a washer pan. The following pic is the current config.

Can I connect the standpipe drain line to the 3" vent using a wye fitting?

 

[Smooky]

You cannot connect a drain into a vent

 

[Sponsor]

 

[GoodMikeT]

You cannot connect a drain into a vent

You cannot connect a drain into a vent

I had a feeling that would be no good. How about this way; the angled section would be removed.

 

[Smooky]

What are you going to do with the existing tub and the shower drains? Do you plan to cut out and repair that section of pipe?

 

[GoodMikeT]

What are you going to do with the existing tub and the shower drains? Do you plan to cut out and repair that section of pipe?

I plan on using the existing tub and shower drain to connect to a washer drain pan since this is a second floor bathroom.

 

[hj]

quote; How about this way;

The "new way" looks exactly like the old way. The pipes just go in a different direction. And the connection to the system is still too low.

 

[GoodMikeT]

quote; How about this way;

The "new way" looks exactly like the old way. The pipes just go in a different direction. And the connection to the system is still too low.

Does this look any better? In this example I would remove the existing bath/shower trap and cap the line. The new washer pan would have an open drain to the outside.

 

[Smooky]

I would cut out the section where the toilet and tub tied into the 3” drain line. You need to come up and tie the vents together at 42 inches above the floor or the minimum height would be 6” above the flood rim of fixtures on this floor. The sanitary tee fitting should be inverted where the vents are connected or you need a vent tee.

Helpful Plumbing Hints for Residential Construction by Bert Polk Plumbing Inspector Lincoln County

 

[Reach4]

the minimum height would be 6” above the flood rim of fixtures on this floor.

I think the flood rim of what you plan would be the top of the standpipe.

 

[GoodMikeT]

I would cut out the section where the toilet and tub tied into the 3” drain line. You need to come up and tie the vents together at 42 inches above the floor or the minimum height would be 6” above the flood rim of fixtures on this floor.

I can definitely cut out and cap the tub drain but I will be installing a new toilet in the current flange location.

 

[Smooky]

Uh oh, then that ain't going to work.

 

[Reach4]

Uh oh, then that ain't going to work.

It looks to me as if GoodMikeT could add as many vents as it takes in that wall, no?

 

[Smooky]

That is correct Reach4, but it will need a little reconfiguring.

 

[GoodMikeT]

would this work?

 

[Smooky]

In the above diagram the washer is vented but the toilet is not. The little extra “L” part is not doing anything the way you have it there. You cannot wet vent a toilet with a washer. The washer waste should enter the 3” pipe below the toilet drain.
Do you have access to the drain pipe below where the toilet ties into the 3” pipe?

 

[GoodMikeT]

Do you have access to the drain pipe below where the toilet ties into the 3” pipe?

I'll find out if I have access tomorrow when I pull up the rest of the subfloor.

 

[GoodMikeT]

I removed some more sub floor to get better access. The first pic is a san-t installed below the san-t for the toilet. The second pic is a 3x3x3 san-t with a 2" inlet. The 1 1/2" pipe from the tub will be cut off and capped in both instances. would either of these options work?
k?

 

[Cwhyu2]

The first picture is right but you want to use a wye instead of a tee.

 

[Smooky]

I agree with cwhyu2. The top picture is about what you need. The drain fitting below the sani-tee from the toilet should be a wye instead of another sani-tee. You are almost there.

 

[GoodMikeT]

Before I start cutting pipes, I am curious as to whether I can connect the washer drain to the two inch waste/vent pipe in the pic below (left side). The bathroom sink drains into this pipe. it is also a wet vent for the sink in the bathroom below.