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 722 722 Tee
752 P-Trap
718 90° Street Elbow
719 45° Street Elbow
731 Y-Branch 90° Reducing Long Turn
753 Coupling
727 Sanitary Tees 90° Reducing Short Turn
754 Bath P-Trap
706 45° Long Turn Elbow
708 11 1/4° Elbow
735 Y-Branch 45° Reducing