Hi
I am using a small dresser ( top is 16 inches wide.. and has a top drawer above a 1 shelf cabinet area) as a bathroom vanity with a vessell sink and vessel faucet. It looks GREAT and better than any vanity I saw at the store ( unless I wanted to spend a FORTUNE). I want to minimize the amount of cutting into the drawer and shelving of the dresser to accommodate the pipes... which run into the FLOOR... not the wall. The "s" pipe is right in the middle of all the shelving and it would be easier if it were lower OR A DIFFERENT CONFIGURATION.. is it possible to either 1. do a lower "s" pipe or 2. just do a straight pipe into the floor or 3. an option I can't think of. All of the dresser conversions I have read about have the pipes running into the wall... any input is welcome. Thanks

Good idea Charr,
Vanities and vessel sinks are a great addition to your bathroom. Your problem is the drawers and the "S" trap. But you're going to hafta configure those drawers to allow the trap to drop through the floor. You have a choice. You can either remove the drawer and mount the front of the drawer on the vanity giving you the space that you need. Or perhaps you could notch them. Why not vent your sink by installing a a "P" trap with a AAV. (Air Admittance Valve see image) after the AAV install a street ell to get you pointed down. Sound like a plan? Tom

Straight pipe into the floor is not an option, you would have no trap and this would allow sewer gas to enter your home through the sink drain. Since you have an existing s-trap, you can lower it as far as you can( just leave two to three inches between bottom of trap and cabinet floor for trap install purpuses. I would also use an aav as tom suggested. This way you have some venting action.

If you buy dresser cabinet designed for vessel sink it will have either notched upper drawer or upper drawer will be a dummy. Face of the upper drawer will be nailed to the frame, therefore , will be unoperable. In few cases, the upper drawer is operable, but is very shallow, like 4" deep to accommodate contour of the sink ( if set deep into the cabinet ) and / or drain.

You have to do the same: either notch the upper drawer or make it a dummy. Depending on design of the dresser cabinet you could save the bottom drawer but the upper one will - most likely - have to be modified.

If you have crawl space, you could go straight down and install P-trap below the floor.

If you buy dresser cabinet designed for vessel sink it will have either notched upper drawer or upper drawer will be a dummy. Face of the upper drawer will be nailed to the frame, therefore , will be unoperable. In few cases, the upper drawer is operable, but is very shallow, like 4" deep to accommodate contour of the sink ( if set deep into the cabinet ) and / or drain.

You have to do the same: either notch the upper drawer or make it a dummy. Depending on design of the dresser cabinet you could save the bottom drawer but the upper one will - most likely - have to be modified.

If you have crawl space, you could go straight down and install P-trap below the floor.
Good advice about the trap, However she's using a regular dresser and not a lavatory vanity. Also since she is installing a vessel sink she won't have the hassle countersinking the bowl. Cheers, tom

Good Morning Charr,
You say,
even with the diagram I am still a bit confised about the configureation of the pipe. Can you elaborate?
This is the trap that you now have installed,(see image) Yes?" I want to add a Air Admittance Vent (see image) so your vessel sink will be vented.
The drainage pipe will still go through the floor and as Milosuggests you can drop the trap down under the drawers. Sound like a plan? Regards, Tom

Charr, here is what I would do in this the situation if I wanted to save as much drawer as possible:

1. You put vessel sink on top of the cabinet
2. You drill 1 1/2" hole for the drain
3. Drain will penetrate top of the cabinet about 3" deep
4. Attach sink to the cabinet
5. Inside the cabinet: install sharp 1 1/2" street 90 and drain adapter on protruding drain aiming against the wall
6. Glue in short piece of pipe aiming against the wall
7. Install another 90 aiming donward, Glue it in
8. Drill hole in the bottom of the cabinet and floor, and as close against the back of the cabinet as possible, and so it lines up with the 90
9. Glue in long piece of pipe. (Now, this vertical piece of pipe is all the way against the back of the cabinet ) Should penetrate the floor about a foot. Glue it into the 90
10. Go under the house, install glue-trap and connect with vent and connect to house drain.

In other words, you will transfer drain from the middle of the cabinet all the way towards its back. There is always bit of space behind the drawers. The 1 1/2" pipe should fit into that space. That should do...