ROTARY WASTES Section 3 - Supply & Drain Zurn Universal Twist Drain For Commercial Kitchen Sinks Drain fits sinks with 3-1/2 " opening and has standard 2 " MPT outlet. Also easily converts to 1-1/2 " MPT outlet by using the included 1-1/2 " MPT adapter. It also has a 1-1/4 " MPT overflow connection which comes complete with a 1-1/4 " slip nut and cap. Cat.# OEM 29423 Z89600 Description Zurn AquaSpec® Twist Drain Waste Vent Ell Cat.# 10756 Description Rotary Waste Vent Elbow Assembly 1-1/4 " OD Overflow / Vent Tube Cat.# Description 10757 Rotary Waste Vent Tube 1-1/4 " OD 14 " X 8 " Reducing Tailpiece Washer Cat.# Description 42237 Black Rubber Reducing Tailpiece Washer, 2 " X 1-1/2 " MARK'S PLUMBING PARTS WWW.MARKSPP.COM 3-35https://www.markspp.com/Catalog/Detail/10170 https://www.markspp.com/Catalog/Detail/10171 http://WWW.MARKSPP.COM