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yardeningplus1 10-29-2008 07:12 AM

Can I add a shower stall drain to my sink drain
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I want to add a shower stall to my basement 1/2 bath. There is a sink and toilet right now. I am adding a picture so you can have a look. The shower stall will be about 5 feet from the sink drain. Thanks for allowing me on this forum. Any advice muchly appreciated.

DangerMouse 10-29-2008 08:16 AM

more input needed... is there room under the floor to work? basement? crawl space? if so, you might want to mount new drain under the toilet drain shown. drains need to have gravity involved, if you added a drain to the sink drain, water would have to flow downhill to it. i see no room to add a drain as shown. shower drain would need to be higher than sink drain, yes? but of course, i'm often way off base too......


Termite 10-29-2008 09:03 AM

You should be able to add a shower, but you will have no choice but to break up a section of the concrete slab to access the under-slab plumbing, which is where you'll tap in the 2" drain from the shower.

DangerMouse 10-29-2008 09:37 AM



yardeningplus1 10-29-2008 08:23 PM

Thanks to all that replied. By the books that I have been reading, I have to go with "thekctermite" reply right now. Sorry MdangermouseM. As you can see by the pic, that is my concrete basement floor. The big 3 inch pipe has to be my vent pipe as the toilet drain pipe is about 5 to 7 feet to the right. Now to all, if I raised the shower stall on a raised platform, would that make any sense as to going into the pipe without cut the floor, or is it better to stay on the floor level and beat the bezes out of the floor to expose the pipe. Please comment. Also, if you check the pic, is the sink drain pipe vented into the big pipe. I see no other pipes from the sink.
Thanks again all

Wethead 10-29-2008 09:15 PM


You will have to break up that floor in order to tap that waste line unless you build a platform and raise the shower up and then "drop into" the line now that you are higher,

As far as pipe size for drainage and the vents you will be fine and it will all work, its just a matter of you breaking up the floor or building a platform,

Extra Tip: Most home centers or tool rental places rent jackhammers for around $39 a day, so a few dollars in $$ and some sweat , you be washing off in no time :)

Hope this helps !

Termite 10-29-2008 10:55 PM

Don't be freaked out by the idea of knocking out a little concrete. It isn't a big deal and it is done all the time. The plumbing under the slab isn't anything special or intimidating. As stated, can rent a small jackhammer and have the concrete out before you know it. Simply cut in the wye fitting for the shower, prime and glue it, and run it over to the shower drain location (buy your shower pan if that's how you'll do it and have it on site for dimensional accuracy). You'll then pour some gravel around it and cover it with concrete (bag mix). A few hours' work is all.

I'd sure avoid doing the shower on a platform. Major turnoff for an educated buyer if you ever sell....It just screams lazy DIYer, instead of someone who did it right! Plus, it is just odd to step up into a shower.

DangerMouse 10-30-2008 04:24 AM

is there a bathroom above this one? just curious...


yardeningplus1 10-30-2008 07:04 AM

Thanks to all. I guess it is the breaking up of the concrete that wins. All your help is greatly appreciated. It saves time and money. Note to all, there is a bathroom about it. I'm sure the sinks and showers are all connected. The toilets are on their own pipe.

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