Depending on the sink you have, you’ll find a variety of pipes underneath it. You have lines that bring water to your faucets and a trap, which could be an S-trap or a P-trap depending on where you live. It costs between $150 and $250 to replace just the P-trap. This U-shaped pipe keeps smells from coming back into your home by holding a small amount of water in the bottom of the U. If you smell something terrible, it’s probably time to replace the P-trap under your sink. 

In general, you’ll need to replace your kitchen sink drain pipes when they leak, smell, or are too old. On average, replacing all of the plumbing under your kitchen sink will cost between $100 and $350. Costs will be higher, though, if you add disposal or need a special drain.

Why You Should Replace 

A drain can wear out over time. The stopper that keeps water from leaking out of the sink can start leaking, or the gutter’s surface can rust or become tarnished. It could get a crack or lousy seal, letting water drip from under the sink.

The national average cost to fix a kitchen sink drain:

The cost of materials to replace a kitchen sink drain ranges from $9.52 to $11.70 per drain on a national scale. The total cost per drain, including labor and materials, is $250.40, between $226.95 and $273.86. The actual cost depends on your location, the size of the job, the conditions, and the type of finish you choose.

  • Average National Materials Cost per drain: $10.61
  • Average National Cost for one drain (labor and materials): $250.40
  • Price range (labor and materials) for one drain in the U.S.: $226.95 – $273.86

How to Choose a New Drain 

When looking for a replacement, there are a few things to consider. Each drain comprises a group of parts that must match the design of the sink and the way the drain pipe under the sink is connected. 

Single Basin. For single basin designs, the drain must fit the hole in the bottom of the sink and seal well. You must ensure you know how much space you need around the trap and what size and style of connection you need to fit the drain pipe below. 

Multi-Basin. Most sinks with two basins have a single trap and a drain that goes to both. However, each drain can have its catch. Pick a replacement that fits the sink well and has a surprise that makes it easy to connect to the pipe below.

Installed by Experts 

Most kitchen sinks have a garbage disposal, which complicates replacement. Our skilled installer can ensure that the drain works properly and doesn’t leak. Consider upgrading to a new sink, drain style, or disposal when replacing a drain. Our installer discusses these alternatives.

Need assistance from a qualified plumber to replace the plumbing system under your kitchen sink? Look no further than Sacramento Repipe & Plumbing. We can definitely help you with any plumbing issues, including replacing the plumbing under your kitchen sink. From installing new pipes to repairing old ones, we have everything you need to give your home a complete plumbing makeover.


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