How to Fix a Slow Sink Drain: 7 Methods

Clear Out Debris With a Drain Zip Tool

Fix a slow-draining sink without vinegar or other drain cleaners using a simple drain zip tool to manually remove hair and debris clogs. A drain zip is an inexpensive, flexible 2-foot plastic zip-tie-looking snake with barbs or bristles that can catch or attach hair and soap scum. The zip tool is threaded down the drain and can be used in a sink drain with or without a pop-up because it is thin enough to fit even with a pop-up.

Clean the Stopper

Remove and clean the stopper. A pop-up drain stopper and the sloped shape of the sink are designed for optimal debris and build-up collection. If you do not have a drain zip tool, or the tool cannot clear out all debris, another option is to remove and clean the pop-up.

Most pop-ups are held in place with a nut attached to the drain just under the sink. To remove the pop-up, reach behind the drain pipe under the sink to find the pop-up nut. Once the nut is removed, the pop-up can be removed from the sink drain, cleaned, and reinstalled.

Use Homemade Drain Cleaner

Employ a DIY solution. A homemade drain cleaner can clean the drain pipes after the larger debris has been pulled out. The chemical reaction caused by combining two common and inexpensive household products, like vinegar and baking soda, can help break down the mucky build-up on the inside of the drain pipes and get the drain flowing freely again.

• Pour 1/2 cup of baking soda down a slow-draining sink.
• Follow it with 1/2 cup of vinegar.
• Let the mixture rest for a few minutes.
• Rinse the solution with boiling water to clear the clog.
  

Clear the Sink Overflow

Clean the overflow. The sink overflow is another place where debris and build-up can be collected over time. If a sink drains slowly and cleaning the drain doesn't work, try to clean the overflow.

The overflow opening is intended to divert water into the drain if it accidentally rises too high in the sink. It also allows air into the drain when the sink is filled with water, helping it drain faster.

Use a Plunger

Give it a good plunging. A plunger can be used on a slow sink drain; it does not have to be reserved for a complete drain stoppage. Plunging can help loosen and dislodge hair and debris in the pipe. To ensure the plunging motion is effective, cover the sink overflow with a rag or some duct tape to make a seal before plunging.

Use a Snake

Try a snake. If straightforward methods aren't working, consider getting a drain auger or snake to clear a bathroom or kitchen sink drain. A drain snake is a thin, flexible metal cable that can be wound or unwound on a reel. It has a drill or corkscrew-like end that can penetrate clogs, dislodge them, and pull them out.

Clean the P-Trap

Unclog the P-trap. If all other methods fail to clear a stubborn clog, the last step before calling a professional is removing and cleaning the P-trap or the drain pipe under the sink with a bend shaped like a "P" rotated 90 degrees, clockwise to the right. That U-shaped bend in the pipe is a top spot for gunk, like hair, food, grease, and debris, to build up and get clogged.

Once you remove the drain pipe, you need a bucket to catch residue, water, and debris. You might need Channellock pliers or a wrench if you can't unscrew the slip nuts by hand.

• To safely remove and clean the P-trap, turn off the water supply to the sink.
  
• Unthread the slip nuts.
• Pull the trap down to remove it.
• Clean the pipe.
• Reinstall it.