Hi all,

I am finishing my basement and have had a vanity and wet bar drain installed by a licensed plumber. Here are the pictures. Pic-A is the vanity drain and Pic-B is the wet bar drain.

http://www.nados.com/Private/3a.jpg http://www.nados.com/Private/2b.jpg

I will be installing my own CPVC water supply lines, the "RED" lines, to the vanity and wet bar. The vanity drain is 18" off the floor with a vent at the top of the 2" pipe. The wet bar drain is about 16" off the floor with the vent on top of the tee that extends off the elbow.

Here are my problems and questions...

1 - The vanity drain, Pic-A, as you can see would interfere with the placement of left water line. If I place the lines below the drain, I will have to manuver the left line around the back of the drain. Is it ok to drop the water lines just above or to the right side of the drain?

2 - The wet bar drain, Pic-B, as you can see a lower than 18" off the floor and it has an albow with a vent on it. I would like to remove the elbow/vent and replace it with a tee similar to the configuration on the vantiy drain, Pic-A, except that the 1 1/2 stub off the tee would stick out to accept the trap adapter. Is this OK?

3 - how do I secure the water lines around the drains since the drains would interfere with a 2x4 nailed between the studs?

4 - should I tee off the main 3/4" water lines with 1/2" pipe then run 1/2" lines all the way to each drain or should I tee off the 3/4" main pipes with 3/4" lines and only convert to 1/2" at the drains?

Hey Nelson,

I think you're making problems where none exist. Water piping's the easiest thing there is in plumbing.

1 - The vanity drain, Pic-A, as you can see would interfere with the placement of left water line. If I place the lines below the drain, I will have to maneuver the left line around the back of the drain. Is it OK to drop the water lines just above or to the right side of the drain?

You bring both the supplies down behind and stub out a inch below the drain. Cut a piece of backing, install it under the drain stub out and secure the supplies with 1/2" pipe straps. Installing the supplies above just will make it more difficult to tie them to the vanity. You may, (and i see no reason why you should) install both to the rightside but you'll have a problem with backing.

2 - The wet bar drain, Pic-B, as you can see a lower than 18" off the floor and it has an albow with a vent on it. I would like to remove the elbow/vent and replace it with a tee similar to the configuration on the vantiy drain, Pic-A, except that the 1 1/2 stub off the tee would stick out to accept the trap adapter. Is this OK?

If you wish to convert the vent from a AAV to a regular vent I can see no problem. Will you be reventing back to the vanity vent? The 1 1/2" stub out is fine.

3 - how do i secure the water lines around the drains since the drains would interfere with a 2x4 nailed between the studs?

I've already explained about the vanity above and i would drop the bar sink supplies down and,(since it looks like you have the room) run the backing, (your know you don't have to use 2X4 backing, you can use 1X3 if space is tight) below and in front of the drain or if you plan on keeping the AAV you
may leave the supplies where they and install the backing above the elbo.

4 - should i tee off the main 3/4" water lines with 1/2" pipe then run 1/2" lines all the way to each drain or should I tee off the 3/4" main pipes with 3/4" lines and only convert to 1/2" at the drains?

Code allows three fixtures off a 1/2" branch so you will take off one set of supplies from the 3/4" main and then tee off for each fixture.

Good luck. Tom

Thanks for your quick response.

Yea... I have a tendency to let little things stop me. I just thought I'd ask so I don't get in trouble with the plumbing inspector.

Yes I plan to alter the wet bar drain to look like the vanity drain except that the tee stub will point out into the vanity. Both drains will retain the auto vent caps obove the tee's.

"Yes I plan to alter the wet bar drain to look like the vanity drain except that the tee stub will point out into the vanity. Both drains will retain the auto vent caps obove the tee's."

And with that one paragraph you completely lost me.

You say, " Both drains will retain the auto vent caps obove the tee's."
But the picture doesn't show a AAV on the vanity. It shows a regular vent off the tee.

" I plan to alter the wet bar drain to look like the vanity drain ."
That would indicate that you're replacing the AAV with a regular vent, which is contradicted by the last sentence up above.

"the wet bar tee stub will point out into the vanity."
The wet bar stubout will point into the vanity? Where did I go wrong? Tom

Hi Tom,

Sorry about the mixup. Here is a revised set of pictures.

http://www.nados.com/private/3aa.jpg http://www.nados.com/private/2b.jpg http://www.nados.com/private/2bb.jpg

Pic. "A", shows the vanity drain. It does have an auto vent, it was just not shown in the original picture. I did a little photo retouching to show it. The pipe above the tee is actually twice as long as shown in the picture.

The two "B" pic's show the wet bar drain on the opposite wall of the bathroom with the tee pointing out into the basement living area. The left one shows how it is now with an elbow, tee and the auto vent. The right one shows how I would like to rework the drain so the auto vent will be inside the wall.

I just want to know if my idea for "B" is OK?

I'm already know that I have to allow access to the auto vents.

I'll tee off the 3/4" mains with 1/2" lines and tee off to the drains and toilet.

BTW, I get the point about dropping and securing the water lines around the drains.

P.S.
Also, I hope things are OK for you and your family in Florida.

What you could have done is stubed out with a elbo,(like you did with the bar sink at first) and put a tee inside the cabinet with the AAV coming off the tee. That way you wouldn't have to access the vents.
Yes your reconfiguration of "B" will work just fine. Regards, Tom

Thanks for your help!