Hello, A while back I posted about finishing my basement bathroom and installing a standup shower. Well since then I have decided to add a tub/shower.
Now the problem is that the drain / overflow assy. brings my trap down too low which prevents me from getting 1/4"/ft slope. If I were able to attach the
drain that sits in the tub directly to the trap and piece the rest together I would be able to get my pitch. Is this possible or any sugesstions would be great. Thanks,

John

Hi John,

I don't understand what you are trying to do. On the one hand it kinda sounds like you are going with a tub instead, but then I think you are going with a stall shower and a tub too. And why would the drain/overflow interfere? I guess you are asking a plumbing problem and not a tile installation question?

Jaz

Hey jaz, Yes I will be putting in a tub. The assembled drain assy. will sit down too far. If I were able to connect the trap the drain it would work. See the pic hoe the tube extends further down. See link
http://www.plumbingsupply.com/wasteoverflowparts.html

[img]http://www.plumbingsupply.com/wasteoverflowparts.html[/img]

Ok, now I know what you mean. When you said 1/4" per ft. I thought you were talking about a stall shower.

I'm no plumber, but I think you can slope the pipes a little less then 1/4"? But rather then trying to modify things, why not just put the tub on a platform? You could extend the platform 12-18" to make a step out of it.

Jaz

John

I do a lot of plumbing so I will try to help you with this one. My first question is how far down in the slab is the top of the 2" pipe that you have roughed in for the tub?


Hi Jaz!

Hi guys, and thanks. The pipe that is there now pretty much sits about 2" below the top of the slab. So it looks like it sits in the middle of the slab. The previos owner (who was the original) I think put it in himself. The shower pan was set right on top of the 1.5" drain which was not secured to the drain. It just sat on top of it and the walls were paneling.

Thanks for the help,

John

John

There shouldn't be a pipe in the slab that is less than 2", but who knows what the previous homeowner did?

With the top of the pipe being 2" below the surface, the trap will end up being far enough down that the waste and overflow assembly from the tub will just have enough room for you to hook it up.

John

Instead of using a brass waste and overflow you might consider using an ABS waste/overflow.
I use OS&B mechanical overflows for my installations.

The following may work depending on where the drain line is coming in.
If you use the ABS version install the sanitary tee horizontal instead of verticle. You will have to try different combinations of 90's (ells)or 45's to connect to the drain line.

Hopefully that works without having to raise the tub.

If you have the option to exchange tubs, purchase one that has no front skirt. Raise the tub up to the minimum height you need and buid the skirt wall for a tile installation. That way you won't need a step out front.

But I would have to go up hill to connect to the pipe that goes to the waste stack.

From the stack the pipe follows along the crawl space floor which is about 4" below the bathroom slab to the tub about 7' away. Then an alley in the concrete floor was chipped away for the pipe and trap for the shower.

I left the pipe that runs along the crawl space floor and was hoping that the connection from the tub to the existing pipe would work. But with the drain/overflow assy. it brings me about 1" below the pipe I need to connect to.

So I was hoping that I could just connect the Chrome Waste Plug Assembly (#9 in the link above) directly to the trap then add a "T" for the overflow and connect to the existing pipe in the crawl space that would work. I'm going to the plumbing supply store tomorrow to see what they can do for me. But if you have any other suggestions keep them coming. I could dig up my crawl sapce but that is concrete too. So I want to avoid that route unless its the last resort. Thanks Jaz and Rob for the help.

john,

i just had the same slope/fall problem with a walk in closet that I am converting into a 70 sq ft master bath, The original house and plumbing is up on peers. The large addition on the back of the house is on a slab. The tie in to the original plumbing was impossible, to run through the back yard with a fall of 1/4' per foot at 100 yards would have put me way to far below grade at the tank. My plumber install a 110 volt lift station/grinder pump below grade jut outside the exterior wall of the bathroom. This is a self contained unit that looks like an industrial trash can that is capable of pumping wast material 40' vertical through a 2 " pvc line.
The cost for the unit is about 1k. He has installed them for years in many $1 million + homes where the run to the septic tank is just too long.

I am not sure if this will solve your fall problem but it took care of mine.

Jim