ABS 22.5° elbow for the gentlest standard change of direction in an ABS DWV line — the 1/16-bend that nudges a drain or vent a few degrees off-axis to clear a joist, stud, or another line without the commitment of a 45. Both ends are hub sockets sized for Schedule 40 IPS ABS, solvent-welded for a rigid joint that holds its slight angle once the run is strapped. It meets ASTM D2661 and CSA B181.1 and carries cUPC and NSF/ANSI 14 certification, the listings an inspector checks on a residential or light-commercial rough-in across the GTA. Stocked in 1½", 2", and 3" — the sizes that handle most fine offsets in branch and stack routing. A 22.5 is a non-pressurized DWV fitting only; test the system hydrostatically, never with compressed air or gas.