John McMullen
New Member
Hello,
If you have a 6" overflow drain pipe, is it acceptable to split it into (2) 4" vertical pipes and (2) 4" lambs tongue downspout nozzles right at the exterior wall?
(2) 4" pipes will handle the GPM and roof square footage capacity by code.
Has anyone done this before? I don't know the code says anything about it.
If you have a 6" overflow drain pipe, is it acceptable to split it into (2) 4" vertical pipes and (2) 4" lambs tongue downspout nozzles right at the exterior wall?
(2) 4" pipes will handle the GPM and roof square footage capacity by code.
Has anyone done this before? I don't know the code says anything about it.