Whole House Plumbing

Discussion in 'General Plumbing Help' started by bnicol3, Jan 8, 2019.

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  1. Jan 8, 2019 #1

    bnicol3

    bnicol3

    bnicol3

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    Hello everyone!

    New to the forums to ask the opinion of those who know more than me when it comes to plumbing.

    I have lived in my house for just over a year now, and I knew going in that the plumbing would need a complete overhaul soon, it is currently a mis-mash of rolled copper, PVC, CPVC, Black Flex Hose, Cast Iron and Galvanized Steel.

    I was looking to replace the whole kit and caboodle with Hard Copper, and PVC. (I know the advantages of PEX but prefer the time tested Copper)

    Obviously I am not a plumber but I enjoy a challenge and working with my hands.

    The main question I have is that the house currently has 3 vents in different sections of the house/system only 1 is currently in active use due to years of cutting and piecing by previous owners.

    My thought/intention was to replace the main sewer line (Cast) with PVC and run the perimeter of my basement with 5-6 inch main line hooking in the various fixtures and vents along the way.

    I created a logical (IT guy) mapping of my intention and was interested in the thoughts of the community.
     

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  2. Jan 8, 2019 #2

    frodo

    frodo

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    simple enough

    6.5x552 (1).JPG
     
  3. Jan 8, 2019 #3

    frodo

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    it looks like you want to run with the floor joists?
    I assume that is the reason your trunk line is offset from under the plumbing?

    is head room a concern?
     
  4. Jan 8, 2019 #4

    bnicol3

    bnicol3

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    Admittedly the diagram is limited as it is only one dimensional.

    The main soil line exits the front of the house while most of the faucets are on the back of the house.

    So to answer your question about running with the floor joists, Yes and no, On its way out it will be running with the joists, while its collecting from the faucets and connecting to vents it will be running perpendicular to the joists then take a 90-ish degree turn to make the final run out.

    Head room is a minor concern as the basement is low (not crawl) but the plumbing only needs to run along the edges of the basement as all the faucets are roughly within a few feet of the edges of the house.
     
  5. Jan 8, 2019 #5

    frodo

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    Last edited: Jan 9, 2019
  6. Jan 8, 2019 #6

    frodo

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    3 stool 1.jpg 6.5x552 (1).JPG


    Questions?????????????????????????????
     
  7. Jan 9, 2019 #7

    frodo

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  8. Jan 9, 2019 #8

    frodo

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    by code
    within 5' of the sewer exiting the building you must install a 2 way cleanout
    they make a simple 1 piece 2 way clean that is total crap [imo]
    2 combinations glued together, in the shown configuration is the way to go
    the snake will not fight the direction you want it to go

    crap.png
     
  9. Jan 9, 2019 #9

    wood4d

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    Comment is for your drawing, not frodos. The fixtures need to be vented not the house drain. I have seen lots of plumbing jobs using oversize drains with minimal venting. The vents go above the trap. Your whole house can be done on 3".
     
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  10. Jan 9, 2019 #10

    frodo

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    Wood4d is correct, the job of a vent is to protect the trap seal of the p trap
    by supplying equal air pressure on both sides of the water seal [trap]
    by doing this, it stops the trap from being siphoned dry when water is drained
    due to negative pressure on one side of the seal
    each fixture must have a vent
     
  11. Jan 11, 2019 #11

    bnicol3

    bnicol3

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    Frodo, Thank you for all of your input on this, I will definitely keep it in mind when it comes time to start on this massive project.

    Wood4d, The diagram doesn't show it, but there is a vent under the kitchen sink before the trap, I would most likely keep this in the system to maintain the vent above the trap.

    This is the vent in use: https://www.menards.com/main/plumbi...563-c-8557.htm?tid=8197701485696072363&ipos=1
     

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