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  1. #1
    Join Date
    Jun 2010
    Posts
    41

    Default Switch shower and toilet areas without re-plumbing drain pipe?

    I have no idea what our homebuilder was thinking (spec home), but our shower enclosure is smaller than the enclosure where the toilet is located. When we remodel this bathroom, we'd like to switch the two areas so we can have a larger shower. Would we have to have the drain in each location re-plumbed or can the shower water drain into the same pipe that formerly served the toilet (and vice versa)?

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,066

    Default Re: Switch shower and toilet areas without re-plumbing drain pipe?

    I don't have good news for you: a shower can be put where a toilet once was, but not the other way around.

    A toilet needs a 3" drain line, while a shower a 2" line.

  3. #3
    Join Date
    Jun 2010
    Posts
    41

    Default Re: Switch shower and toilet areas without re-plumbing drain pipe?

    Good to know. So, we'd need to re-plumb the (new) toilet location drain pipe, correct? Or are you saying that's not possible without replacing the pipe serving the toilet all the way out to the city sewer? (Forgive my ignorance; I know I'm an idiot about such things).
    Last edited by handsindirt; 02-07-2013 at 11:32 PM.

  4. #4
    Join Date
    May 2008
    Location
    Pacific Northwet
    Posts
    1,356

    Default Re: Switch shower and toilet areas without re-plumbing drain pipe?

    Quote Originally Posted by handsindirt View Post
    Good to know. So, we'd need to re-plumb the (new) toilet location drain pipe, correct? Or are you saying that's not possible without replacing the pipe serving the toilet all the way out to the city sewer? (Forgive my ignorance; I know I'm an idiot about such things).
    At the very least, you'd need to run a 3" drain line to the shower area for the toilet. You'll also need to remove the existing toilet flange and some of the piping in the current toilet location and you may need to alter the venting.

    If you're lucky, you'll be able to do this all within the bathroom area; you probably won't have to go all the way to the street. Depending on the construction of your house, you may need to cut into the floor, or the ceiling below the bathroom.

    Are you planning to do the remodeling yourself or hire it out? Either way, you'll want to know what it's going to involve before you start, so you might want to have a contractor or plumber come out and tell you what to expect.

    The only way for it to be a "simple" job is if it is above crawlspace. If it's slab-on-grade (concrete floor) or above another story, it gets complicated really fast.
    The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.

  5. #5
    Join Date
    Jun 2010
    Posts
    41

    Smile Re: Switch shower and toilet areas without re-plumbing drain pipe?

    Thank you for this info.

    We will definitely hire out the entire remodeling job. It'll pretty much be a "gut" job, so if the floor needs to be cut into for plumbing, that's okay. And, fortunately, the bathroom is on the first floor and is above a crawlspace!

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