90 degree turns in trap arms
90 degree turns in trap arms
(OP)
Does the International Plumbing Code allow allow for 90 degree horizontal turns in fixture trap arms without the need for a cleanout (also called dirty arm) similar to the Uniform Plumbing Code? I couldn't find it in the IPC, but maybe it is defined differently.
Example: a horizontal trap arm from a sink p-trap that turns 90 degrees horizontally in the wall before connecting to the vertical vent.
Example: a horizontal trap arm from a sink p-trap that turns 90 degrees horizontally in the wall before connecting to the vertical vent.





RE: 90 degree turns in trap arms
I have seen similar arrangements be accepted, but it does "violate" the 90 degree rule of section 708, although it could be argued that a removable p-trap (which is considered a clean out) and the short (<40 ft) of travel the pipe goes to the vertical would be acceptable under 708.3.3
Talk to your code inspector/AHJ and see what they will allow/accept. That is always best in questionable circumstances.
RE: 90 degree turns in trap arms