Results 1 to 8 of 8
  1. #1
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default Crazy TPR pipe routing

    I called out an installation with 9.... yes 9 - 90 degree bends in it. Plus it runs uphill and effectively has a P-trap within a couple of the 90s.

    Apparently, the plumber is defending it and is going to be calling me. Can anyone cite a quick code section of the many that are wrong here. Or, is it just a manufactuer's specification thing?

    I dug up some old threads and it seems the most according to the manufacturers has been 4.

    Edit: Just remembered.... it also joins another pipe of the same size/type along its run out of the house.

    Similar Threads:
    Last edited by Matt Fellman; 12-21-2011 at 08:16 PM.
    NHIE Practice Exam

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,245

    Default Re: Crazy TPR pipe routing

    Quote Originally Posted by Matt Fellman View Post
    I called out an installation with 9.... yes 9 - 90 degree bends in it. Plus it runs uphill and effectively has a P-trap within a couple of the 90s.

    Apparently, the plumber is defending it and is going to be calling me. Can anyone cite a quick code section of the many that are wrong here. Or, is it just a manufactuer's specification thing?
    "Or, is it just a manufactuer's specification thing?" Yep.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  3. #3
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default Re: Crazy TPR pipe routing

    I looked it up in my code book (Oregon Specialty Code) and the trap is a problem... as is the upward routing according to the section (attached document). I guess the 9 - 90s are just generally a bad idea.

    Attached Files Attached Files

  4. #4
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default Re: Crazy TPR pipe routing

    Quote Originally Posted by Jerry Peck View Post
    "Or, is it just a manufactuer's specification thing?" Yep.
    How is it "just" a manufacturer's specification thing when the IRC prohibits trapping?

    2006 IRC P2803.6.1 Requirements for discharge pipe.
    8. Not be trapped.
    9. Be installed to flow by gravity.

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  5. #5
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Crazy TPR pipe routing

    Here is what the NC code says about relief valve piping. It looks like your insallation violates 2,8,9.


    504.6 Requirements for discharge piping. The discharge
    piping serving a pressure relief valve, temperature relief valve
    or combination thereof shall:
    1. Not be directly connected to the drainage system.
    2. Discharge through an air gap located in the same room
    as the water heater either on the floor into an indirect
    waste receptor or outdoors.
    3. Not be smaller than the diameter of the outlet of the
    valve served and shall discharge full size to the air gap.
    4. Serve a single relief device and shall not connect to piping
    serving any other relief device or equipment.
    5. Deleted.
    6. Discharge in a manner that does not cause personal
    injury or structural damage.
    7. Discharge to a termination point that is observable by
    the building occupants.
    8. Not be trapped.
    9. Be installed so as to flow by gravity.
    10. Not terminate more than 6 inches (152 mm) above the
    floor or waste receptor.
    11. Not have a threaded connection at the end of such piping.
    12. Not have valves or tee fittings.
    13. Be constructed of those materials listed in Section
    605.4 or materials tested, rated and approved for such use in accordance with ASME AI12.4.1.



  6. #6
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default Re: Crazy TPR pipe routing

    I talked to the plumber today.... he says trapping is allowed as long as there is a hole drilled in the trap. I'm starting to feel like I'm in an episode of the twilight zone.....


  7. #7
    Join Date
    Feb 2011
    Location
    Port Orange, FL
    Posts
    13

    Default Re: Crazy TPR pipe routing

    Have the plumber put it in writing with his state license number and sign it.
    Then turn him in to the state.
    Quote Originally Posted by James Duffin View Post
    Here is what the NC code says about relief valve piping. It looks like your insallation violates 2,8,9.



    504.6 Requirements for discharge piping. The discharge
    piping serving a pressure relief valve, temperature relief valve
    or combination thereof shall:
    1. Not be directly connected to the drainage system.
    2. Discharge through an air gap located in the same room
    as the water heater either on the floor into an indirect
    waste receptor or outdoors.
    3. Not be smaller than the diameter of the outlet of the
    valve served and shall discharge full size to the air gap.
    4. Serve a single relief device and shall not connect to piping
    serving any other relief device or equipment.
    5. Deleted.
    6. Discharge in a manner that does not cause personal
    injury or structural damage.



    7. Discharge to a termination point that is observable by
    the building occupants.
    8. Not be trapped.
    9. Be installed so as to flow by gravity.
    10. Not terminate more than 6 inches (152 mm) above the
    floor or waste receptor.
    11. Not have a threaded connection at the end of such piping.
    12. Not have valves or tee fittings.
    13. Be constructed of those materials listed in Section

    605.4 or materials tested, rated and approved for such use in accordance with ASME AI12.4.1.





  8. #8
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,245

    Default Re: Crazy TPR pipe routing

    Quote Originally Posted by John Arnold View Post
    How is it "just" a manufacturer's specification thing when the IRC prohibits trapping?

    2006 IRC P2803.6.1 Requirements for discharge pipe.
    8. Not be trapped.
    9. Be installed to flow by gravity.
    I was referring to the 9 - 90 elbows.

    The entire discharge line did not meet what the code calls for, trap or no trap, I did not feel I needed to post that entire code section because it was so bad - I figured that the 9 -90 elbows would be enough to correct it.

    James posted a partial list of the IRC requirements, as amended (and deleted) by NC.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •