3 Key Pieces Of A Kitchen Sink Strainer


The strainer in your kitchen sink allows water and small food particles to leave your sink and escape safely down your plumbing. Repairing or replacing a sink strainer isn't a difficult task for those with do-it-yourself experience. But before you undergo any new home improvement task, it's important to know the names and functions of the parts you will need to work on as the sink strainer is a vital part of drain repair.

Here are the key pieces of a kitchen sink strainer that exist.

Strainer Assembly

There are a couple different types of strainer assemblies but the types are the same down to the last piece. Each starts with the mesh-like strainer plug in your sink. You can put the strainer in and out to block water or catch food particles. This works because the strainer fits down tightly into its basket to form a plug.

The basket has a grooved nub that sticks out below the sink. Attached to this nub are a set of washers that include at least one rubber and one fiber washer. The next piece varies depending on how the basket is connected to the tailpiece under the sink.

Some sinks will have a metal nut then a metal retaining bracket that hooks onto the tailpiece. Other sinks will have a metal locknut that simply screws the basket onto the tailpiece.


The tailpiece is a straight pipe that forms the first part of the sink's drain system. What does the tailpiece do? It essentially serves as a rerouting junction. Water and food debris go straight through the tailpiece into the P-trap.

But there's also a small extender off the side of the tailpiece that is a vital component of dishwasher installation. This dishwasher waste nib is where the drain line for your dishwasher attaches so that the excess water can go down your pipes.

Why is the nib so important? Other than making the waste line easier to hook up, the nib offers a way for water to enter into the pipe without interfering with the main flow of water from the kitchen sink.


The P-trap is the last stop on the drain system before the waste pipe. Older sinks used to have what was called a S-trap but any renovation project should involve upgrading to a P-trap. What's the difference?

Each pipe type got its name from its shape. An S-trap pipe came down off the tailpiece, curved up, curved back down and then attached to the waste pipe. The end of the S-trap attached to the top of the waste line in a vertical line. So an S-trap offered little resistance to any waste that came back up the pipe due to a pipe or sewer issue.

A sink with a P-trap has a parallel vertical waste line that the P-trap end attaches to in a horizontal line. This means that any waste coming back up the pipe would go straight up that waste line instead of curving up and into the trap. For assistance, talk to a professional like Shanks A & G Plumbing & Heating Ltd.


1 April 2015

Learning All About Plumbing Materials

Hey everyone, my name is Marcell Robins. I am excited to share information about plumbing supplies on this site. Plumbing repair services caught my attention after a pipe burst during the last winter storm. The temperature dropped so quickly that we did not have time to prepare the home for the changes. As a result, one of the pipes running under the laundry room froze shut and popped open at the seams. When the water thawed, it started leaking like crazy beneath the house. It was at that point that I started to learn about the wide range of materials used for plumbing repairs. I want to share that knowledge with you to help everyone correctly maintain the plumbing components throughout their home. Thanks for coming to my website.