CONCENTRIC, REDUCING TYPE; PVC MATERIAL; 6 SIZE A; 4 SIZE B; SDR 35 SCHEDULE; CSA B182.2, IAPMO, NSF, UPC APPLICABLE STANDARD; DRAIN, SEWER APPLICATION; INJECTION MOLDED PROCESS; ASTM D1784/D3034/F679 MATERIAL SPECIFICATION; HUB X HUB END CONNECTION