double sink vanity rough plumbing -- please check my plan

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by awake, Jul 29, 2014.

  1. awake

    awake New Member

    Messages:
    13
    I am a DIY working on a bathroom remodel which includes converting a single sink vanity into a double. I have done enough plumbing in the past to feel reasonably confident, and have read extensively here; I want to make sure I understand what is needed.

    Here is the current plumbing:

    IMG_3190.JPG

    Also a close-up -- anybody see a problem with what the original builder did here?!? (How exactly do you drive a drywall screw through a stud plate and not know it??)

    IMG_3191.JPG


    The new vanity will position the right-hand sink just about where the current stack is. The left hand sink will be about 16" to the left of where the original sink was -- i.e., it will need to move left one stud bay.

    After a good bit of thought, here is what I am planning, assuming that I get a green light from the knowledgeable folks on this forum:

    Cut the current 2" ABS stack above and below the current tee junction. Change over to PVC using flexible couplings (unless you think I should join with the green cement -- ??) -- changing to PVC because it is easier for me to source, and cheaper even counting in the cost of the couplings. Put a double fixture tee (2" x 2" x 1.5" x 1.5") in where the current sanitary tee is. On the right, the double fixture tee will immediately join with a 1.5" elbow to bring the right-hand sink drain out of the wall. On the left will be about a 32" run of 1.5" drain, then an elbow to bring the left-hand sink drain out of the wall.

    Questions:

    1) Am I right in thinking the horizontal runs need to drain a minimum of 1/4" per foot?

    2) Is it a problem to go right from the double tee to the elbow out of the wall?

    3) Is it a problem that the left and right sides of this will be so different in length?

    4) All I can find at the local hardware stores (both big box and small town) are double sanitary tees, but my understanding is that that is not optimal, even if it were to pass code. So I have found double fixture tees on-line, - or at least, I think I have. It seems that these are called a hundred different things. I want to be sure that either or both of these are in fact the right fixture:

    [​IMG]

    (several sizes on this page; I would get the 2 x 2 x 1.5 x 1.5)

    or



    Many thanks for your help!
    Last edited by a moderator: Jul 29, 2014
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    You can use a double fixture fitting, either 1.5" at the top or 2"
    Most hardware stores carry a double fixture fitting. At least all of the plumbing supply stores do.

    Each trap arm can be up to 42" in length.
  3. awake

    awake New Member

    Messages:
    13
    Thanks, Terry. The rest of the plan sounds okay?

    What I'm seeing is a picture of an ABS fitting, rather than the PVC fittings I tried to link to. The one that I am reasonably sure is correct is for a Spears P500-251 PVC Double-Fixture Wye. I need to have 2" top and bottom, and 1.5" on either side -- the vent is 2" going up. And no, I can't find a local store that carries any such thing :( ... but I live out in the boonies, so that may have something to do with it.
    Last edited by a moderator: Jul 29, 2014
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    If you feel compelled to advertise for online companies, please send me a check first.
    You can ask and answer questiosn without advertising.
    Just stick to the plumbing questions, and don't feel you need to send people to your favorite retailer.
    What do you do for a living? I would love to advertise your competitor for free here. Maybe we can put a dent in your business. I can make it an ad on every page. Buy from Awake's competitor!

    And by the way, ABS goes with ABS and PVC goes with PVC.
    If you switch to PVC with couplings, it will need to be the shielded couplings to prevent the pipes from shifting. You can't use the rubber Ferncos.
  5. awake

    awake New Member

    Messages:
    13
    Terry,

    My apologies -- it was not my intention at all to advertise for a particular retailer. I seem to have poked a sore spot, and I certainly did not mean to. I just wanted to be sure that I had found the correct fitting; that was my only intention in posting the link. I hadn't understood what had happened to the links, but now I realize that they were violating the rules of the forum. Again, please accept my apologies.

    Yes, I know that ABS goes with ABS, and PVC goes with PVC ... but I thought -- apparently incorrectly -- that I had read here that the rubber fittings were the proper way to deal with the transition. I have not heard of the shielded couplings; any chance you could post or send me a link (presumably, to an acceptable retailer! :))?
  6. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    [​IMG]

    Mission

    [​IMG]

    Proflex

    These are two brands. And there are more.
    Most stores will carry something like them. HD and Lowes for sure.
    The metal wrap keeps the pipes aligned.
    All of us plumbers have seen rubber fittings that have sagged badly over time. Our plumbing inspectors don't let us use them.
  7. awake

    awake New Member

    Messages:
    13
    Again, many thanks. I am seeing something in the first picture that makes me wonder if these are intended to be used only with specific types of material -- e.g., this one only joins CI to PVC, while that one only joins ABS to PVC -- or do they work with any combination of materials?

    I am NOT trying to cause any problems with my next question, but only to make sure I learn the rules of the forum: based on your last post, is it okay to mention big-box stores by name? Part of my confusion also is having seen a link in an old post to a different on-line retailer, so I am genuinely not sure what is allowed and what isn't. Again, I am not trying to cause any problems -- on the contrary, I want to be sure I don't cause problems in the future!
  8. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    Jeff Bezos from Amazon went on 60 minutes last December.
    Asked about his plan for the future, he said he would run at a loss for eight years, and after that all the competion would be out of business. And then he started laughing.
    Jeff is worth 26 billion now. Not enough though.
    When Amazon found out I was selling high end plumbing, they took over the market.
    They then called me and wanted my labor too. So first they took over my product sales as best they could, and then they wanted my labor sales. There is no way any business in plumbing could stay alive getting half their labor and none of their product sales.
    I would still be required to be a State Licensed Plumber, carry bonding and insurance, pay for employees, work vans, phones and an office. I have to follow the rules for being a Washington State contractor. Amazon doesn't have to as far as I know. They expect the little guys to do all that.
    Amazon would hold the money, and if they decided I wasn't Amazon enough for them, could legally withhold money forever. Which they have done to other business owners.
    They now are asking auto shops that do oil changes, to give up their parts and accept half the labor for being on Amazon. Since a good company makes a 5% profit, you can imaging how quickly anyone that does business that way will fail.
    Thursday I go out to Vashon Island and install a TOTO Drake II with Sanagloss and a TOTO S300e Washlet with installation. But it's my customer.
    If you check out this link, there was a customer in the San Juan's that after three deliveries, still didn't have a complete toilet. He kept getting broken porcelain in bent boxes.

    http://www.terrylove.com/forums/ind...shed-from-amazon-what-a-disappointment.57691/

    When I take a ferry to Vashon, it's going to be perfect. :)
    Hand delivered and installed by me.
  9. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    Those couplings can be had in many configerations.
    No-hub cast iron to no-hub cast iron
    plastic to plastic
    no-hub to copper
    plastic to copper
    plastic to nu-hub

    the rubber sleeve is what makes the difference, and then the metal wrap.
  10. awake

    awake New Member

    Messages:
    13
    Terry, that helps to provide the context. I certainly understand your anger with them. For a DIY like me, it becomes a real dilemma -- the big outfits have driven the smaller stores and independent suppliers out of business, especially in an out-of-the-way place like where I live, leaving me with few options for finding supplies. Round and round it goes ...

    Again, and even more so, thank you for all of your help!
  11. asktom

    asktom Member

    Messages:
    556
    Location:
    Victor, MT
    I am a bookoholic in rural Montana so Amazon is wonderful, except that they are doing the same sort of thing that Terry talked about with authors and publishers, even refusing to sell their product if they don't go along with the gag. I have decided to quit buying from them. Oh, and as a point of humor, an Amazon ad is displayed directly above the box I am making this comment in.
  12. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    At least they're paying for it :)
    They become hard to block.
  13. asktom

    asktom Member

    Messages:
    556
    Location:
    Victor, MT
    If you can't block them perhaps a hold or a clip would work.
  14. ragdoll

    ragdoll New Member

    Messages:
    2
  15. ragdoll

    ragdoll New Member

    Messages:
    2
Similar Threads: double sink
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & does double kitchen sink require two traps? Aug 17, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Checking my plumbing - single sink to double sink Aug 8, 2014
Plumbing Forum, Professional & DIY Advice, Tips & New Disposer with Double Sink Plumbing Jun 18, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Double sink with two garbage disposers Jun 6, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Converting Single Sink to Double Sink with water line for humidifier Apr 28, 2014

Share This Page