Interlodge
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I am always coming across a lot of posts on S traps. I was reading the NJ code (national standard plumbing code) on something else and came across this under Prohibited traps......S traps of uniform internal dimensions.
Later in the venting section it referred to "vents may be connected below the top weir of the fixture trap if the following conditions are met
1. vertical section of drain pipe is at least one size larger than trap inlet size.
2. the horizontal pipe connected to the trap outlet shall be at least 2 pipe diameters long.
3. The developed length of the trap arm shall not exceed the normal table.
Does that sound like a somewhat modified s trap is allowed?
Also came across the requirement that a 1/1/2' drain is suitable for a shower stall served by one shower head, 2" if multiple heads.
This is the 2006 code taken from the NJ state website.
Later in the venting section it referred to "vents may be connected below the top weir of the fixture trap if the following conditions are met
1. vertical section of drain pipe is at least one size larger than trap inlet size.
2. the horizontal pipe connected to the trap outlet shall be at least 2 pipe diameters long.
3. The developed length of the trap arm shall not exceed the normal table.
Does that sound like a somewhat modified s trap is allowed?
Also came across the requirement that a 1/1/2' drain is suitable for a shower stall served by one shower head, 2" if multiple heads.
This is the 2006 code taken from the NJ state website.