Hi everybody,
I bought a house with a basement toilet where the floor was raised 14 inches off the floor to accommodate the cast iron pipes. I am replacing the cast with ABS and tying into a wye coming from the stack that is about an inch above the cement floor. I want the floor to be as low as possible to match the rest of the floor in the rest of the basement. One thing I thought of trying was a commercial toilet that drains out the back instead of down through the floor. There is one at a salvage store that they will sell me for only 50$. Can anyone tell me if there is anything special to take into account with these toilets? i.e.: do they need a higher water flow? Whenever I have seen them in use they flush like a whirlpool. If I could use it, I could build a false wall and have it drain out through the wall and down to the wye. PS: I am in Canada if it matters.
Thanks for your help.
Dan

Does your sewer pipe leave the home through the floor or through a wall, if wall how high up from the floor. 14" sounds pretty tall just for a drain pipe.

The sewer stack leaves through the concrete floor. The cast tied into a wye an inch or so above floor level. He put 2x12's on their side to support the floor, then plywood on top, then the floor, so it was more than 12" anyway. I cut the cast back to the wye in the main stack, and I was planning on using a 4x3 Fernco rubber connector to tie the ABS to the wye.

Good approach. You could tear the 2x12 down to about a 2x4 and use a 3" ABS or PVC. I don't suppose you want to tear into the concrete floor do you? Didn't think so. The hubless Fernco should be fine.

I would still have to go with a 2x6 to accommodate the fact that the wye enters the stack about an inch of the floor and to give it a bit of a slope (especially since a 2x4 is only actually 1 3/4 x 3 3/4 or so... ). Add to that an OSB subfloor and the flooring and I'm over 6 inches. The floor outside the bathroom is only 2 inches (1" tongue and groove boards on 1" strapping), so I still will get a step up. This is why I would like to use a toilet that drains out the back instead of down, then I don't need the 2x6s (or even 2x4s) under the floor. So back to my original question... Can anyone tell me if there is anything special I would have to do to install a toilet that drains out the back instead of down through the floor? Ie: does it take a special water pressure, or a separate pump or something?

Thanks for your help,
Dan

I will ask Speedball 1 to take a look at your question since I have never done a wall flush toilet.

Can anyone tell me if there is anything special I would have to do to install a toilet that drains out the back instead of down through the floor?
You will have to rough for it but since you already have drainage above the floor you're halfway there. Click on; Guide to Rear Outlet Toilets & Bidets and Rear Outlet Toilet & Bidet Showrooms (http://www.homeportfolio.com/catalog/guide/Bath_Fixtures/Toilets_&_Bidets/Rough/Rear_Outlet.jhtml)
To check out rear discharge toilets. Need more choices? Regards, Tom

Even has the pictures to help. Thanks Tom.