I bought an "upflush" toilet for the basement (www.saniflo.com - the saniPRO unit), which uses a maceator and a pump to pump waste up to a standard drain line (in my case the kitchen sink line that runs across my basement wall). It sits on the basement floor. No digging required. It has inputs on each side to connect a shower and sink, and it'll pump that water up, too.

Ceiling is 7 foot in the basement. Code says shower must be 6'8" to be legal. I can't fit a standard ptrap in 4".

The maker of the pump says I need 1/4 inch of rise per foot - and it only has to travel about 4 feet. It's the darn Ptrap that is causing all the problems.

The maker of the pump said I cannot break up concrete to make the p-trap fit (don't know why, they clearly said NO). I also cannot dig up concrete to sink the pump. Breaking concrete is not an option.

Question 1: Can I not use a ptrap? (The pump is between the shower drain and the sewer line - think the pump might be enough to block the gases from coming up the shower drain?)

Question 2: Are there any alternatives to a p-trap? Are there low profile p-traps or valves that will fit in the line and stop the gases? What about the ProSet "Trap Guard"? Think I could make something like that work? (http://www.trapguard.com/index.htm)

Question 3: Any idea how I can make this work in 4 inches without breaking the floor?

Thank you! Thank you! Thank you! Thank you! Thank you! Thank you!

Any input you have is greatly appreciated!!