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Kitchen Sink Couplings

(3 products)
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Frequently Asked Questions

What size coupling do I need?

Measure the drain hole of your sink. Ruhe kitchen sink couplings are 4.5 inches.

Square or round coupling?

Both do the same job; pick the strainer shape you like. Check the grade (304-Grade or 202-Grade steel) on each product.

I have a double bowl sink. What do I need?

Two couplings, one per bowl, and a double bowl connector to join them into one waste pipe.

My coupling leaks underneath. What should I check?

Tighten the lock nut under the sink and check that the rubber washer sits flat; replace the washer if it is worn.

What Is Sink Coupling?

A sink coupling, also known as a sink strainer or sink drain, is a plumbing part that connects the sink to the drain pipe, allowing water and small waste to pass through while preventing larger items from blocking the pipes.

What Are the Components of a Sink Coupling?

  • - Strainer body: The part of the sink strainer that is visible from above the sink. It has holes to allow water and small particles to flow into the drain.
  • - Locknut: The locknut secures the sink strainer in place. It is tightened onto the threads of the strainer body from below the sink.
  • - Rubber and cardboard washer: These washers are placed between the locknut and the bottom of the sink to ensure a watertight seal.
  • - Tailpiece: The tailpiece is the section of pipe that extends down from the strainer body. It connects the sink strainer to the drain pipe.

What Kind of Sink Couplings Are Available at Ruhe?

  • - Round PVC Sink Coupling
  • - 304-Grade Stainless Steel Square Sink Coupling

Why Choose Ruhe’s Sink Coupling?

  • - Sustainable & Authentic Material
  • - 30 Days Easy Return & Exchange

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