Sunday, October 13, 2013

Technical Post #2 - Passive House Plumbing - Design


Plumbing our house, with no basement or crawlspace, has required careful advance planning and design.  A significant portion of our drain, waste, and vent piping will actually be buried under our foundation slab, which means we have to plumb it before we know where the walls will be.  In order to do that, we had to design the plumbing system for the entire house, because once the foundation is poured, we can't change anything underneath it.  With assistance from an engineer and a plumbing designer at my office, I did the plumbing design with significant input from Jake who 3-D modeled the entire house (and plumbing piping) in Sketch-Up.  



Jake's 3-D model, showing the underground plumbing.
House plumbing riser diagram (not to scale).
Jake used the location of the electrical conduit as a reference point, and then used pegs and strings to layout where the walls will be in order to locate critical piping like the toilet drain, or vent piping that needs to run in interior walls. 

Strings indicating exterior and interior walls, or for alignment in a room.
Once Jake has finished the sub-slab plumbing, and the Code Enforcement Officer has inspected and approved the installation, we will fill it back in and then cover the entire site with crushed stone in preparation for the foundation insulation.  

31 comments:

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  4. How are all the technical work going? Are they done? The essential structure were slowly coming together in this post, so I assume you are close to getting the house finished by now. I hope everything flows smoothly in your journey to building this project.

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    2. The house is substantially finished at this point. I don't know if everything flowed smoothly but no show stopping mistakes were made. Thankfully.

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  11. Looks like a good floor plan. We're working on designing our own house and We'll have to be really careful about how we do our plumbing. I wonder how do you clean those pipes if they get clogged? http://www.lewisplumbingsantabarbara.com/plumbing-services-for-californias-gold-coast/

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    1. Well, just an update on how it's going: we just set the groundwork and laid the foundation with the plumbing installed. We're wanting to actually try using the Hydronics for a heating system in our house. It's taking a lot of planning, but we think it would be a good investment.
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    2. Hey there! We just implanted the Hydronics and they work great now! We did run into a plumbing problem the other day, but it was easily fixed due to better design. It's nice now to have heated floors from the system. We're still working on expanding the project to cover the upstairs, but so far it's going great!
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    3. Hey there! We just implanted the Hydronics and they work great now! We did run into a plumbing problem the other day, but it was easily fixed due to better design. It's nice now to have heated floors from the system. We're still working on expanding the project to cover the upstairs, but so far it's going great!
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    4. Hey there! We just implanted the Hydronics and they work great now! We did run into a plumbing problem the other day, but it was easily fixed due to better design. It's nice now to have heated floors from the system. We're still working on expanding the project to cover the upstairs, but so far it's going great!
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    5. Hey there! We just implanted the Hydronics and they work great now! We did run into a plumbing problem the other day, but it was easily fixed due to better design. It's nice now to have heated floors from the system. We're still working on expanding the project to cover the upstairs, but so far it's going great!
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    6. Justifying a complex hydronic heating system in something like a Passivhaus would be a difficult proposition.

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  12. What software did you use for the model?

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    Replies
    1. SketchUp was used almost exclusively for modeling.

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