Slowly learning how to do drain lines.

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JoePro

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We are doing a major reno to our house, which includes an addition, moving the laundry upstairs, and adding a third bathroom as well. It became too many DFU for code for one 3" horizontal branch, and how some of the plumbing was done on the basement of this house was just a mess so we decided to redo it.

I started putting in some new plumbing fittings, following IPC 2015 (which is what Virginia follows). So far I have replumbed the main level half bath and started the new 4" stack to the upstairs.

Let me know if you see any code issues (of note the code does state that a horizontal branch cannot connect within 2' of a vertical stack but it explicitly states that this is for stacks with 4 or more branches) our stack will have 2 branch levels. So this should be fine.

Basement sub-slab connections and wye to pick up new stack and 3" to toilet/sink. Connected wye with 4" metal shielded no hub conforming to CSA b602.

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Under first floor connections for main level bathroom, and stack to upstairs:

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Main Level (4" stack not connected to upstairs yet, the vent connections tied together was existing)

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Let me know what you think.
 

wwhitney

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We are doing a major reno to our house, which includes an addition, moving the laundry upstairs, and adding a third bathroom as well. It became too many DFU for code for one 3" horizontal branch,
Since you have the half bath plumbed separately (other than in the basement), how did you get to over 20 DFUs from 2 baths and a laundry room?

What is the 4" shielded coupling that you used? Make and model.

I don't see any issues in the photos otherwise. When a drain is turning from horizontal to vertical (in the direction of flow), it's fine to use a quarter bend instead of a LT90, but a LT90 is OK, too.

Cheers, Wayne
 

JoePro

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Since you have the half bath plumbed separately (other than in the basement), how did you get to over 20 DFUs from 2 baths and a laundry room?
- There will be three full bathrooms upstairs.
Bathroom 1; Normal bathroom Group
Bathroom 2; Normal bathroom group + extra vanity
Bathroom 3; Normal bathroom group + extra vanity + standalone tub + dual shower outlets (not sure if this actually changes anything)
+ laundry

Total was 22DFU, Im sure I could have made it work with 3", but I like to make things hard... o_O

What is the 4" shielded coupling that you used? Make and model.
Ideal - 622008G (I believe its this model, it does say on it CISPI 310 and CSA B602) - https://www.idealtridon.com/classic-no-hub-coupling-476.html

I don't see any issues in the photos otherwise. When a drain is turning from horizontal to vertical (in the direction of flow), it's fine to use a quarter bend instead of a LT90, but a LT90 is OK, too.

Cheers, Wayne
Yeah I figured based on the chart in the code book, however I felt a long turn would be a better transition anyway.

Thanks so much for the prompt feedback.
 
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wwhitney

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Ideal - 622008G (I believe its this model, it does say on it CISPI 310 and CSA B602) - https://www.idealtridon.com/classic-no-hub-coupling-476.html
Thanks for the CSA B602 reference. I hadn't realized no-hub couplings can be listed to a standard that allows their use in joining plastic to plastic under the IPC.

https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.2.1
https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.10.1
https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.16

But how does that work exactly in 3" and 4" sizes, where no-hub cast iron is 1/8" smaller in OD than Schedule 40 plastic? I would think the no-hub wouldn't fit very well, and that a purpose made fitting like Fernco 1056-44 or Fernco 1056-44RC would fit better. I'm a bit surprised there doesn't seem to be a requirement to use a fitting like that.

Cheers, Wayne
 

JoePro

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Thanks for the CSA B602 reference. I hadn't realized no-hub couplings can be listed to a standard that allows their use in joining plastic to plastic under the IPC.

https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.2.1
https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.10.1
https://up.codes/viewer/virginia/va-plumbing-code-2018/chapter/7/sanitary-drainage#705.16

But how does that work exactly in 3" and 4" sizes, where no-hub cast iron is 1/8" smaller in OD than Schedule 40 plastic? I would think the no-hub wouldn't fit very well, and that a purpose made fitting like Fernco 1056-44 or Fernco 1056-44RC would fit better. I'm a bit surprised there doesn't seem to be a requirement to use a fitting like that.

Cheers, Wayne

im honestly not sure I know on the fitting it does state plastic to plastic or ci/ci. I’ll post a pic when i get up.
I see what you recommended but since things are already cut to size to fit a nohub, I might switch it to a Fernco p3000-44. While nothing is glued it’s still easy to pop that out and change it. However I don’t think I’d have a problem either way, as the clamp does have b602 stamped on it. And says plastic->plastic
 

JoePro

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Based on the markings on the rubber coupling I am going to leave it and not replace it.

cast iron - plastic - plastic and b602 is mentioned.

E3948521-E8B1-4AF5-B6CB-28E9C4AFD55F.jpeg
 

wwhitney

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No point in changing it to a Fernco Proflex, as the only additional listing it has is ASTM C1460, which is for above ground use. My questions weren't necessarily directed at your project, just some uncertainty in my understanding. But I'm curious if the no-hub was a tight fit to get on the PVC all the way, give the 1/8" difference in OD?

Cheers, Wayne
 

JoePro

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No point in changing it to a Fernco Proflex, as the only additional listing it has is ASTM C1460, which is for above ground use. My questions weren't necessarily directed at your project, just some uncertainty in my understanding. But I'm curious if the no-hub was a tight fit to get on the PVC all the way, give the 1/8" difference in OD?

Cheers, Wayne

It was about the only thing I was not 100% sure about since some mechanical fittings are only approved for specific materials so I’m glad you questioned it. Yes it was a very tight fit with the rubber coupling, a fit I was happy with.

Going to spend some time and glue all this up today!
 
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