Anvil drainage fittings have sufficient sweep to allow free unobstructed flow. They are made with a shoulder of the same diameter as the inside of the pipe, in accordance with ASME B16.12, Type 1. Thus, continuous passage is created when the pipe is screwed to the shoulder, leaving no place for solid matter to collect and clog in the pipe.
FIG 754 754 Bath P-Trap
726 Sanitary Tees 90° Short Turn
753 Coupling
731 Y-Branch 90° Reducing Long Turn
723 Reducing Tee
708 11 1/4° Elbow
752 P-Trap
736 45° Double Y-Branch
701R 90° Reducing Short Turn Elbow
730 Y-Branch 90° Long Turn
734 Y-Branch 45°