Recent content by wwhitney

  1. wwhitney

    Venting help please...

    That the IPC. For the UPC, you are limited to 60". Cheers, Wayne
  2. wwhitney

    Venting help please...

    Several details on your drawing aren't clear to me. But a few comments, based on the UPC, in use in WA state: 1) The vent for the WC, whether a direct dry vent, or via wet venting from the lav or shower, must be 2". All other dry vents can be 1.5". The total vent penetrations through the...
  3. wwhitney

    Another Vent Question

    In your drawing, the washer standpipe and bathroom sink are being dry vented. The WC and the tub/shower are being wet vented. Except there is a problem--wet vents are limited to carrying the drainage of bathroom fixtures. So you need to keep the washer drain separate from the 3" line until...
  4. wwhitney

    Sink drain correct and to code?

    Yes, for the IPC. Not sure what you mean by auto-vent. The simplest way to deal with over 6 feet is to use a horizontal combo (or the IPC would allow a san-tee on it back) to take the dry vent off within the distance limit, and then have the dry vent rise to at least 6" above the fixture flood...
  5. wwhitney

    Planning Basement Bathroom in MN

    On the "Final Junction" if the upper drain is exactly perpendicular in plan from the lower drain, you can use a quarter bend rolled 45 degrees from having its outlet pointing straight down to dump the upper drain directly into the branch inlet of a wye on the lower drain with its branch inlet...
  6. wwhitney

    Sink drain correct and to code?

    That picture is very wrong, although I'm not convinced that at the bottom of the red rectangle you have a 2" pipe draining into a 1-1/2" pipe (which would be very very wrong). I think that may just be one of those hub to pipe rubber couplings, so you have a 1-1/2" plastic hub joined to the stub...
  7. wwhitney

    Adapt single vanity drain to double sink drain

    The trap arm is from the trap to the san-tee. You're going to have more than 3" of trap arm inside the cabinet, so the minimum length is a non-issue for sinks. Cheers, Wayne
  8. wwhitney

    Adapt single vanity drain to double sink drain

    The street wye is only useful if you have a san-tee with an open hub. If you're happy using your existing san-tee with a little stub of pipe sticking out, because you don't need the sink the absolute maximum leftward it can be, then just use a combo instead of a coupling, a street wye, and a...
  9. wwhitney

    Adapt single vanity drain to double sink drain

    Sure. If you want it as far left as possible, combos don't come in a street version, so you'd use a street wye and a street 45 in place of the combo. Cheers, Wayne
  10. wwhitney

    Adapt single vanity drain to double sink drain

    If by "run horizontally past" you mean "run through the barrel of", then yes. IRC/IPC allows a 1-1/2" trap arm to be up to 6' in length, but the total fall is limited to 1-1/2", so the full 6' is only achievable if the fall is exactly 1/4" per foot. Cheers, Wayne
  11. wwhitney

    Basement Bathroom Wet Vent + AAV

    This is a confusing point of disagreement between the IRC and IPC (although for the configuration shown in post #7 it turns out not to matter). The IRC's plumbing section has language similar to what you mention, but the IPC does not. In jurisdictions that adopt both the IPC and the IRC's...
  12. wwhitney

    Pipe size up to connection at fixture

    Yes. Yes. The way water volume and pressure works is that if you have a constant pressure supply (like the water main in the street, for practical purposes), the rate of water flow to an outlet is the exact amount that causes all the pressure drops along the route to add up to that source...
  13. wwhitney

    Adapt single vanity drain to double sink drain

    The only thing incorrect about that was the extra elbows and perhaps the use of the wrong sort of "tee" fitting. Indiana has apparently adopted the 2018 IRC including the plumbing sections, but is still on the 2006 IPC. Homeowner's get a choice of whether to following the plumbing sections of...
  14. wwhitney

    New Circuit - Panel Recessed in Concrete

    Just to confirm, you don't actually need a box near where the new outlet is to be located. You just need a box that will let you run surface mount conduit from that box to the desired location, without installing a whole lot of extra conduit. Otherwise, breaking concrete is the only option...
  15. wwhitney

    Planning Basement Bathroom in MN

    No sure what you mean, the proposed plan does have the upstairs drainage connected downstream of the backwater valve. The stack from upstairs is mislabeled SP for main standpipe. Cheers, Wayne
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