(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 5 of 5

Thread: Replace S-trap with P-trap or chicago loop?

Threaded View

  1. #1
    DIY Member staceyneil's Avatar
    Join Date
    Mar 2007
    cumberland foreside, maine

    Default Replace S-trap with P-trap or chicago loop?

    All fixtures in 1920's 2nd floor bath are stack-vented. Sink curently uses S-trap to floor with about a 7-foot run to stack.

    We would like to improve this situation without adding a new vent up though the roof or reventing back to the stack through a wall, which would entail ripping apart the plaster/lathe walls and disturbing the ancient soil stack.

    What about a "chicago loop" type thing like people do in kitchen islands, where the new sink's P-trap goes back into the wall and then includes a loop in the wall, as shown, where the top elbow is higher than the water level, and where the drain line back to the stack in increased to 2".

    Would this work? Any other ideas? Our town uses the International Plumbing Code rules.
    Attached Images Attached Images  


Posting Permissions

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