Bathtub P Trap direction

[Gene.m]

Does it matter which way the P trap is position. I know it cannot be an S Trap but are there dos and donts regarding the direction after the trap. Im trying to fit a vent in the plumbing wall where my shower head copper runs and I was wondering if this will work or any other way I can turn the trap. I need to turn it because the bathtub drain is dead center of the no cut zone in the floor joists. You can see that I had to sister the old joists because the previous plumbers, probably when the house was built, cut in the wrong spots. Its 1 1/2" pipe and trap. There is 3" between the trap and the wye to prevent an S Trap. Thank you for you help.

 

[Jadnashua]

You can twist the p-trap and change the direction any amount where it will still fit without issues.

 

[Sponsor]

 

[hj]

The distance between the trap and the "Y" has NOTHING to do with being an "S" trap.

 

[Gene.m]

The distance between the trap and the "Y" has NOTHING to do with being an "S" trap.

You are correct. I can put the y closer to the trap then. It will help me with the space issue.

 

[Stuff]

There is a minimum trap weir to vent distance but looks like you are OK.
Horizontal distance from trap weir to inner edge of vent shall be within distance in Table 10-1, but not closer than 2 times the diameter of the trap arm.
P3105.3 Crown vent. A vent shall not be installed within two pipe diameters of the trap weir.

 

[DIYluke]

Does that rule, min 2x pipe diameter to avoid being a crown vent, also apply to wet vents or only dry vents?

 

[Stuff]

I don't see any distinction in the code. Wet or dry - 2x is it. For dry vents the reasoning seems to be to keep junk from getting in the vent and blocking it. For wet I haven't seen but would think for a true crown vent the discharge from above could push waste water out the trap and into the fixture.

 

[DIYluke]

Thanks for that Stuff. Good to know.

 

[Reach4]

https://terrylove.com/forums/index.php?threads/p-trap-to-vent-minimum-weir-to-vent-question.53420/ has some more discussion on the minimum trap arm distance.