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Sweetwater Plumbing Blog

The Basics About Sink Plumbing


Pouring water in the kitchen

Working on sink plumbing is one of the standard and everyday parts of our job as professional plumbers. It’s also one of the more complex parts. Homeowners often assume they can take care of the majority problems they may encounter with their sink plumbing. This may be true for a job like cleaning out the aerator in the faucet of getting rid of a simple clog using a plunger. But working with the plumbing beneath the sink, as well as large jobs above the sink, needs the assistance of a professional.

Let’s take a look at the components of your sink

Here are the major components of bathroom and kitchen sinks.

  • The Drain: You know what this is, of course. Make sure to pay attention to what goes down it, however! Kitchen and bathroom sinks may have unwanted objects knocked down into them. Remember that even if you have a garbage disposal for your kitchen sink drain, it can only handle softer food particles. Don’t allow food waste you couldn’t chew with your teeth (popcorn kernels, meat bones, fruit pits) down the disposal!
  • The P-Trap: This is the name for the curved section of pipe directly under the drain. Tilt your head to the side and you’ll see that the section is shaped like a “P.” The purpose of the p-trap is to prevent sewer gas from traveling up the pipeline and into your home. Gravity traps water in the p-trap and serves as a barrier against sewer gas. If you have a garbage disposal, it will be installed right above the p-trap.
  • Waste Lines: This is the pipe that extends off the p-trap into the back wall, where it connects to the wastewater system. Any other waste lines nearby will also connect to it.
  • Supply Lines: This is the pipe that brings fresh water to the faucet. It may be made from flexible plastic or copper. You’ll usually find it attached to the back wall under the sink.
  • Shut-Off Valve: The shut-off valve is attached to the supply line and can be used to turn off the flow of water to the faucet. Make sure you acquaint yourself with the location of this valve, because it’s useful to prevent overflow if the faucet breaks and water starts to spray out.
  • Sprayer: Sprayers are a feature more and more modern kitchen sinks have. A sprayer has its own flexible feed line under the sink. Make sure this line doesn’t become tangled or it will cut off the water flow.
  • Dishwasher Drain Line: If you have a dishwasher located next to your kitchen sink, it has it’s own drain line underneath the sink. It connects to the waste line.

If you have any concerns or questions about your plumbing in Riverside, CA or elsewhere in our wide service area, feel free to contact us. We handle all types of plumbing, large and small, residential and commercial. We’re here 24/7 for whenever you have emergency plumbing needs.

Find the sink plumbing you need when you call us. Sweetwater Plumbing serves Southern California. We don’t charge by the hour, We charge by the job!

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