Hello,

The bathroom in the basement has a 2.5" raised floor, the new shower has a very low base (the shower pan is about 1" above the floor).

The P-trap I found need about 7.5" vertical clearance.

Without rising shower base, what is the best way to make room for th P-trap?

If I have to dig a hole in the concrete slab, what is the proper tool to dig? Do I need to seal off the hole to prevent water leek? How to do that?

Thank you in advance.

Ming

You should ask this in the plumbing section. (or perhaps the mods will move).

Is there an existing drain line at least 2" in diameter? You can rent a electric jack hammer to break up the floor under the drap because the P trap is entirely below the shower pan floor. Have you attempted this level of installion work before, how are your plumbing skills?

Hello Ming,
You will use a cement saw or a jackhammer to break up the cement. But you haven't told us what you're going to connect the shower to or how you plan on venting your shower. What material are the pipes in the floor? What type of pipe and trap will you be using? Back to you, Tom

Several considerations: You may need to raise the shower. Or this might be the eventual best answer for your desired installation. Do you know the elevation of the existing drain (sewer) pipe under the slab? You would want to have a good guess of this before "hammering or sawing". You will need the pipe to be 3" below the bottom of the concrete given a 7 1/2" trap with 4" (estimated) depth of concrete, 1" above concrete in shower (+/-). I'd check all the details before demo concrete.

I have not done similar project before, but I am a good DIY, I believe this job is within my ability (install a new shower stall in the basement washroom). I guess some surprises may pop up, then I will have to deal with them. It would help if you have some tips.

There is no existing spare drain pipe. I plan to share the basin drain pipe nearby. There is vent pipe on the basin drain, but I don't know the exact location of the connection (the project is still in the planning phase), once I open up the wall, I will see if I can share the vent pipe of the shower drain. Do you see any problem in this approach?

Your inputs are greatly appreciated.

Ming

Quote:

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I plan to share the basin drain pipe nearby. There is vent pipe on the basin drain,

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By "basin drain" I hope you mean a sink or lavatory and not a floor drain. If you connect to a drain line from a sink your shower will already be wet vented. Let me nknow exactly what drain line you're referring to. Regards, TRom