Kitchen sink makes noise when toilet flushes

If your kitchen sink makes noise when the toilet flushes, it can be a nuisance․ But don’t worry, it’s usually a simple problem to fix․ Here are a few things you can check⁚

Check the Water Supply Lines

The first thing you should check is the water supply lines․ Make sure that they are properly connected and that there are no leaks․ If there is a leak, it can cause the pipes to vibrate and make noise when the toilet flushes․

To check the water supply lines, turn off the water supply to the sink and toilet․ Then, inspect the lines for any cracks or leaks․ If you find a leak, you will need to repair it before turning the water back on․

Here are some tips for checking the water supply lines⁚

• Look for any visible cracks or leaks in the lines․
• Feel the lines for any loose connections․
• Turn on the water supply and listen for any hissing or dripping sounds․
• If you find a leak, tighten the connection or replace the damaged line․

Once you have checked the water supply lines, turn the water back on and see if the noise has stopped․ If the noise is still there, you can move on to the next step․

Examine the Air Admittance Valve (AAV)

The air admittance valve (AAV) is a small device that allows air to enter the drain system when the water is flowing․ This helps to prevent the drains from siphoning, which can cause noise and other problems․

If the AAV is not working properly, it can cause the kitchen sink to make noise when the toilet flushes; To check the AAV, remove the cap and look inside․ If the valve is clogged with debris, it will need to be cleaned․

Here are some tips for examining the air admittance valve⁚

• Remove the cap from the AAV․
• Look inside the valve for any debris․
• If the valve is clogged, clean it with a small brush or a vacuum cleaner․
• Replace the cap on the AAV․

Once you have checked the AAV, turn on the water and see if the noise has stopped․ If the noise is still there, you can move on to the next step․

Inspect the P-Trap

The P-trap is a U-shaped pipe that is located under the sink․ It traps water to prevent sewer gases from entering the home․ If the P-trap is clogged, it can cause the sink to drain slowly and make noise when the toilet flushes․

To inspect the P-trap, you will need to remove the drain stopper and unscrew the slip nuts that hold the trap in place․ Once the trap is removed, you can check for any debris that may be clogging it․

Here are some tips for inspecting the P-trap⁚

• Remove the drain stopper․
• Unscrew the slip nuts that hold the P-trap in place․
• Remove the P-trap and check for any debris․
• If the P-trap is clogged, clean it with a small brush or a vacuum cleaner․
• Reassemble the P-trap and tighten the slip nuts․

Once you have inspected the P-trap, turn on the water and see if the noise has stopped․ If the noise is still there, you can move on to the next step․

Examine the Sink Drain Stopper

The sink drain stopper is a small device that is used to plug the drain hole in the sink․ If the drain stopper is not properly seated, it can cause the sink to drain slowly and make noise when the toilet flushes․

To examine the sink drain stopper, you will need to remove it from the drain hole․ Once the drain stopper is removed, you can check for any debris that may be preventing it from sealing properly․

Here are some tips for examining the sink drain stopper⁚

• Remove the drain stopper from the drain hole․
• Check for any debris that may be preventing the drain stopper from sealing properly․
• If the drain stopper is clogged, clean it with a small brush or a vacuum cleaner․
• Reinsert the drain stopper into the drain hole and make sure that it is seated properly․

Once you have examined the sink drain stopper, turn on the water and see if the noise has stopped․ If the noise is still there, you can move on to the next step․