How to install a duo cup sink strainer on my sink?

Here we draw each part of a duo cup sink strainer in sequence as below. From top to bottom, they are basket, strainer body, rubber gasket, paper washer, cup, lock nut, PE flange, Tailpiece, and connection nut.

The Plumber's Choice 3-1/2 in. - 4 in. HeavyDuty Kitchen Sink Stainless Steell Drain Assembly with Strainer Basket Stopper ESS2157 - The Home Depot

Installation of Plumbing products

This kitchen sink replacement basket fits in standard kitchen Drains that use post, spring clip or ball lock types of baskets, making it the easy

3-1/2 in. Strainer Basket Universal Replacement for Kitchen Sink Drains Stainless Steel with Rubber Stopper

Sink Double Cup

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KEENEY Double Bowl Sink End Outlet Supply and Drainage Installation Kit MK-DBLBOWLSINK - The Home Depot

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