Rough-in plumbing on new home

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WillD2

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Hello everyone and thank you for the help.

We are building a home slowly over the next year or so while we live in an RV. In order to get a credit towards the cost to run power, we must have a slab and rough-in plumbing done before getting electricity. I have done plumbing work in the past and feel that I am capable...with a good plan. The plan is what I am reaching for help on. I would even pay for the design work if that is an option.

Basically we've got a 1 story, 2 baths that are back-to-back, a kitchen and laundry room near each other as seen in the attached floor plan. Septic on one side and the well water on the other. We would like to use pex piping. I am unsure of what portions should be concreted into the slab or under, general layout efficiency, etc.

Would anyone be available to design a layout for my rough-in plumbing? For hire even?

Thank you so much for any help!
 

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Diehard

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[FONT=Arial]@frodo[/FONT]...What do you think about the fact that some of these new washing machines have flow rates much higher than the older units. Do you think a 3" line (@ 1/8" slope) for the buried drain line from the washing machine should be considered? Particularly since it is also picking up the kitchen.

Here's an article for the OP in case he may not already be aware of it.
https://www.pmmag.com/articles/85477-it-s-not-the-plumbing
 

frodo

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[FONT=Arial]@frodo[/FONT]...What do you think about the fact that some of these new washing machines have flow rates much higher than the older units. Do you think a 3" line (@ 1/8" slope) for the buried drain line from the washing machine should be considered? Particularly since it is also picking up the kitchen.

Here's an article for the OP in case he may not already be aware of it.
https://www.pmmag.com/articles/85477-it-s-not-the-plumbing
it would be better

a 2'' can handle the kitchen, washing machine and that scullery sink with out a problem
I do like the idea of up sizing it, would not hurt my feelings if the 3'' also went to the kitchen ink
 

frodo

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OP
If, you do use Diehards suggestion and run a 3'' line to he washing machine

below the concrete, tun up with a 3'' 90. then install a 3x2 bushing in the 90.
this way, the 2'' pipe will fit in a 2x4 wall...
OR. change the 2x4 wall to a 2x6 wall
 

Diehard

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:thumbsup:
Yes...you could get away without the need to use 3" in the vertical.
I was only referring to the buried horizontal line for the 3".
 

breplum

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The discharge rate issue only comes up with AAVs not conventionally vented laundry situations.
In 45 years, I've never encountered any reported problems with normally vented 2" laundry, kitchen, bathroom groups.
 

frodo

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tub_block_out.png

after the pour
pull the box and dig the dirt out of the hole
set tub. hook up drain
push dirt back into hole/ 1'' from top
cap it with non fiber tar

keeps termites out
 
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