Monday, June 6, 2011

Rough Plumbing

Last week, the plumbers did the rough plumbing for the ADU. There wasn't too much progress to point out each day, but overall, it's interesting to see and understand how the plumbing actually works. The videos below are my attempt to show and explain how the ADU's plumbing works. But, here's a quick overview of some of the significant aspects of the plumbing design.

PEX tubing is used to convey potable water to and through the ADU from the street water main. The water is about 50 degrees when it reaches Portland  from the Bull Rull Watershed in the northwest foothills of Mt. Hood. The ADU's water main immediately splits when it gets to the ADU, sending one PEX tube directly to the tankless water heater (which hasn't yet been installed) to be heated. From there, one hot and one cold PEX tube is then directed to each of the main hot/cold water fixtures (sink, shower).

I've put all the fixtures (bathroom, sinks, etc) on the east side the house to minimize the amount of energy needed to pressurize and convey the potable water around the ADU. Since the house is going to be heated by hydronic, radiant floor heating, the plumbers are taking on the role an HVAC contractor would normally play in most American homes. It's interesting to note that most houses in other countries are not heated by forced air--that's an American thing. Anyhow, minimizing the number of subcontractors involved in the house conditioning gives me a little more executive control over the integrated home mechanical design and saves me and the builder some of the administrative hassle and cost of dealing with so many different sub contractors in the building process.

The sewer drain slopes toward the existing sewer in the main house through the gravel beneath the slab at a slope of 1/4" per foot. Once it joins up with the sewer drain on the main house, it is funneled out to the city sewer in the street.  Finding an appropriate place to position and slope a large sewer pipe was a little more challenging due the smaller size of this structure. Sinks and toilets each have an air gap to keep any sewage odor from coming up from the sewer through those fixtures and into the house. You've probably seen the J-shaped air gaps (or traps) beneath your sinks. In order to properly drain those same pipes then, the air pressure must be equalized on either side of the waste water (or the liquid would be stuck like water in straw that you've capped with your thumb). So, each plumbing fixture has a vent to allow the sewer run to properly pressurize to allow the waste water to drain. The vents that you'll see in the video look like sewer pipes, but they're smaller.

You may have noticed the ends of these vents in your roof in in the form of 'roof jacks'. Usually, there's a roof jack for each water fixture. When designing an airtight structure however, it's a best practice to minimize the number of exterior sheathing penetrations (holes in the exterior walls and roof). So, I asked my plumber to combine all of the vents inside the house to create only one roof jack for the whole structure, instead of four roof jacks.

Ok. On to the videos. Here's an overview of the plumbing.



The two radiant loops on the 2nd floor



The roofing and skylight windows were put up in two days.

14 comments:

  1. These are great videos! I learn a lot more from videos then words. I love learning about plumbers.

    William | Portland Plumber

    ReplyDelete
  2. This comment has been removed by a blog administrator.

    ReplyDelete
  3. This comment has been removed by a blog administrator.

    ReplyDelete
  4. Bottled water may be relatively expensive, but if you are very frugal with it, it could be less costly than plumbing over all. You can do even better if you bottle your own water from someone else's tap. That's usually free! contractor contractor

    ReplyDelete
  5. This comment has been removed by the author.

    ReplyDelete
  6. nice work
    http://www.ju.edu.jo/
    UJ

    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://medicine.ju.edu.jo/Home.aspx
    Faculty of Medicine
    [url]http://medicine.ju.edu.jo/Home.aspx[/url]
    http://arts.ju.edu.jo/Home.aspx
    Faculty of arts
    [url]http://arts.ju.edu.jo/Home.aspx[/url]
    http://law.ju.edu.jo/Home.aspx
    Faculty of law
    [url]http://law.ju.edu.jo/Home.aspx[/url]
    http://business.ju.edu.jo/Home.aspx
    Faculty of business
    [url]http://business.ju.edu.jo/Home.aspx[/url]
    http://centers.ju.edu.jo/en/ctc/Home.aspx
    Cell Therapy Center
    [url]http://centers.ju.edu.jo/en/ctc/Home.aspx[/url]
    http://sites.ju.edu.jo/en/pqmc/Home.aspx
    Accreditation and Quality Assurance Center
    [url]http://sites.ju.edu.jo/en/pqmc/Home.aspx[/url]
    http://science.ju.edu.jo/Home.aspx
    Faculty of science
    [url]http://science.ju.edu.jo/Home.aspx[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx
    Jordan University
    [url]http://www.ju.edu.jo[/url]
    http://www.ju.edu.jo/home.aspx

    ReplyDelete
  7. These are actually wonderful some ideas in the blog. You have touched good quality points here. In whatever way continue writing.

    http://flowfix.co.nz/

    ReplyDelete
  8. I would like to thank you for the efforts you have made in writing this article. I am hoping the same best work from you in the future as well. In fact your creative writing abilities has inspired me to start my own BlogEngine blog now. Really the blogging is spreading its wings rapidly. Your write up is a fine example of it.
    plumbing repair

    ReplyDelete
  9. Plumbing candidates ought to follow school plumbing programs incorporating preparing in plumbing ideas and pipefitting for outline. heating repair patterson

    ReplyDelete
  10. Thank you for your post. This is excellent information. It is amazing and wonderful to visit your site.
    river sand online in Guntur

    sand suppliers in Guntur and Vijayawada

    ReplyDelete
  11. A Langley Plumber is usually hired to deal with the basic and fundamental equipment in our lives. Hot water systems, showers, toilets, dishwashers or washing machines plumbers can fix all substantial issues.

    ReplyDelete
  12. We are providing you best home service include AC service, architecture, electrician etc. Keyvendors

    ReplyDelete
  13. Thank you for sharing this post. Get key Vendors services like interior designers, AC Service, Waterproofing, Home cleaning service, painting service, plumber service etc.

    ReplyDelete

Related Posts Plugin for WordPress, Blogger...