FAQ: How To Install Kitchen Sink Drain Pipe?

Do you need plumbers putty to install a sink drain?

Some plumbers and installers favor plumber’s putty for installing drains, while others lean toward the more modern waterproof material called silicone caulk. Both plumber’s putty and silicone caulk provide a watertight seal for a sink drain.

What size is a kitchen sink drain pipe?

All kitchen sinks today have the same diameter drain, which is 3 1/2 inches and is larger than a bathroom drain which measures in at 1 1/4 inches. It is the same size as a typical standard shower drain, however. When installing a new drain into the sink, you have no need to shop for certain diameter drains.

Does kitchen sink need a vent?

A plumbing fixture like a sink can not function properly without a sink vent. A sink needs a vent because the pressure put on the drain pipe when water flows down the drain pipe needs to equalize. The air needs to escape the drain pipe in order for the sink to vent.

What is a kitchen sink flange?

The flange in a kitchen sink is designed to create a watertight seal between the sink and the plumbing beneath it. The seal gets exposed to dramatic fluctuations in water temperature, and over time it will eventually break down. Fortunately, repairing a leaky kitchen sink flange can be accomplished in one afternoon.

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Why is the pipe under my sink leaking?

Arguably the most common reason you’ll find water beneath your sink is that your drain has a leak in it. Shifting plumbing lines, worn-out connections, or even pipe corrosion could cause fractures in the plumbing lines beneath your sink, which cause water that flows down your drain to slowly and steadily leak out.

What are the parts of a kitchen sink drain?

A Brief Introduction Of The Kitchen Sink Drain Parts

  • Sink Strainer. You should see the sink strainer whenever you use your kitchen sink.
  • Tail Piece. You’ll see the tail piece just right after the strainer.
  • Tee. A tee is a pipe that’s shaped like the letter “T”.
  • Waste Arm.
  • Extension Tube.
  • Coupler.
  • Elbow.
  • P-Trap.

Does a double sink need two traps?

A double bathroom sink installation rarely requires more than one P-trap. The usual practice is to connect the two sinks to a tee and then feed the tee into a single P-trap, which then connects to the drain.

Can a kitchen sink have two traps?

It is perfectly fine to have (2) “P” traps, one on eash sink of a (2) sink setup. As long as the “P” traps are not Double Trapped ( more than one trap serving a fixture ) then it is fine as long as the weir is sized correctly.

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