I have a basement with a rough-in for a 1/2 bath but would like to add a shower. If I use a preform shower can I elevate it so as to put in a trap? Do I even need a trap? If I do need a trap how much space is needed from drain to trap and trap to main line? Also can I utilize the drain pipe for the sink or do I need to tap directly into the sewer line? Last but not least what is the rise over run I need for the pipes? I live in Maryland.

Steve
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I'll answer as much as I can; the rest will no doubt be answered by Tom (a.k.a. speedball1) when he gets here.


If I use a preform shower can I elevate it so as to put in a trap? Do I even need a trap?
Of course you need a trap - all fixtures do. And unless you want to start cutting the concrete, platforming the shower (i.e. elevating it) may be your best option.


Last but not least what is the rise over run I need for the pipes?

Horizontal pipes should slope ¼" per foot.

Cheers,
Moishe

I have a basement with a rough-in for a 1/2 bath but would like to add a shower. If I use a preform shower can I elevate it so as to put in a trap? Do I even need a trap? If I do need a trap how much space is needed from drain to trap and trap to main line? Also can I utilize the drain pipe for the sink or do I need to tap directly into the sewer line? Last but not least what is the rise over run I need for the pipes? I live in Maryland.

Steve
[email protected]

Steve are you the same Steve that's asking about installing a shower over the floor drain a few threads up from this one? If so I wish to merge the two threads into one where I can address your concerns.
To answer your questions. You not only need to trap your shower you'll also need to vent it, unless you're prepared to break cement and wet vent it back to the lavatory drain. The slope is 1/4" to the foot. Regards, Tom

Steve are you the same Steve that's asking about installing a shower over the floor drain a few threads up from this one? If so I wish to merge the two threads into one where I can address your concerns.

No Tom, it doesn't appear to be the same Steve: that one's nickname is "stevem", while this one is "stmcan".

Having said that, the last part of your answer "If you can find a manufactured shower base that the drain will set direct over the floor drain the floor drain possibilty could be adapted to connect." is not relevant; this Steve needs to know how to install a shower without the benefit of a floor drain.

Cheers,
Moishe

Moshie, Thanks for catching that. I caught the difference but what are the changes of two askers asking the same question with the same first name? Any how I deleted the advice about the floor drain but left the question. Regards, Tom