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Thread: New project questions - Water testing and restricted slopes

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    DIY Junior Member jwater7's Avatar
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    Question New project questions - Water testing and restricted slopes

    Hi,
    I've been learning a lot from this site, but this is the first time I'm posting. I have a couple questions related to a job in my home that I'm going to do. I have not done any work on it yet, but I'm trying to plan this all out so I can do quality work and do it quickly. I'm going to be redoing all the DWV for 1 Lav, 1 Bathtub, 1 Kitchen Sink (excluding existing in-wall galv drain/vent), and 1 WC (replacing all cast-iron up to foundation with ABS). The plan is to remove the lead-oakum from the bell of a CI pipe that runs into the concrete foundation in the crawlspace, then attach ABS from there using a donut.

    1. For the rough inspection, I understand that I'm supposed to fill up the plumbing I do with water to the roof. For this, I'm planning on inserting those screw-type test caps on the sinks, toilet flange and tub trap arm. However, I'm a little worried how I prepare the ABS to CI interface. Do I cut the ABS and put a test cap on the ABS pipe that will go into the CI bell? Then how do I reattach it after the test?

    2. I have about 10" that I can use to slope the pipe for all of this (including fittings). The current CI work is back-graded so it's pooling at the cleanout so I'm trying to partially redesign the existing work so that I can correct the grade. I know that horizontal pipe is supposed to run at .25"/ft but can it slope more if necessary - without going vertical so I don't have to use big fittings - for a short run so that I can match it up with the CI bell? For example, a couple 45 Deg elbows on the "horizontal".

    Thanks!

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    DIY Junior Member jwater7's Avatar
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    I may have found something that could answer my first question. I found an inflatable plug that I could stick into the pipe provided I have a wye installed. I attached a picture of it to this post. It wouldn't test the ABS to CI interface but it could do the rest without the need to detach just for the test. I still haven't found anything on Q2. Thanks
    Last edited by jwater7; 01-14-2013 at 04:48 PM.

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    DIY Junior Member jwater7's Avatar
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    Here is a good example, is this considered horizontal or vertical? If horizontal, can it have more than .25"/ft slope? If vertical, what makes it vertical and how long of a run can this be at 45 Deg? (UPC 2009)
    Thanks

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Code requires a MINIMUM of 1/4"/foot, it does not have a maximum. There are other restrictions, such as the maximum number of degrees change in direction before a cleanout is required, and others, as well.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Forum Admin, Expert Plumber Terry's Avatar
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    I like using a test tee and one of these



    If you are using a wye, then the test ball should be longer. The long ones are a bit tricky when they deflate though. For one thing, there isn't anything to prevent them from slipping down the drain farther, and you can get pretty wet if you're not careful.

    Last edited by Terry; 01-15-2013 at 05:46 PM.

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    DIY Junior Member jwater7's Avatar
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    Thanks Terry, that clean-seal looks perfect and I'll see if I can find one.

    jadnashua,
    I was a little concerned over the slope because I've seen conflicting advice in other forums, such as "Water can run away from solids leaving them stranded" and "If you need to exceed 1/2" per foot slope, then...use a 45 degree slope" (I guess referring to unrelated 2006 IRC). So it sounds like I don't need to worry about it then, thank you for the clarifications.

    Side: I just found a similar thread here about slope: http://www.terrylove.com/forums/show...-a-3-quot-line
    Last edited by jwater7; 01-15-2013 at 06:17 PM.

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