Leaky pipe

[Downaski]

Hi everyone,

I’m dealing with a leaky pipe under my kitchen sink and could use some advice. The leak is coming from the joint where the drain pipe connects to the sink. I've tried tightening the connection, but it doesn’t seem to help.

Here are a few details:

• The leak is continuous but not gushing.
• The pipe and fittings are PVC.
• I’ve tried using plumber's tape on the threads, but the leak persists.

I’m wondering if there’s a specific type of sealant or method I should use to fix this issue. Should I replace the joint entirely, or is there a way to stop the leak without doing that?

Thanks in advance for your help!

[TinyTool]

Hi Downaski!

Based on the details you've provided, here are some suggestions to address your leaky kitchen sink drain:

1. Inspect the washer:
   • Remove the slip nut connecting the drain pipe to the sink.
   • Check if the rubber washer is damaged, worn out, or misaligned.
   • If it's in poor condition, replace it with a new one.
2. Check the alignment:
   • Ensure the pipe is properly aligned with the sink drain.
   • Misalignment can cause leaks even if connections are tight.
3. Use plumber's putty:
   • Clean the area around the sink drain thoroughly.
   • Apply a ring of plumber's putty around the drain opening before reassembling.
   • This can create a better seal between the sink and the drain.
4. Try a silicone sealant:
   • If plumber's tape isn't working, a silicone-based sealant designed for plumbing may be more effective.
   • Apply it to the threads before reassembling the joint.
5. Check for cracks:
   • Examine the PVC pipe and fittings for any cracks or damage.
   • If you find any, the affected parts will need to be replaced.
6. Consider replacing the P-trap:
   • If the leak persists after trying these methods, it might be worth replacing the entire P-trap assembly.
   • This is a relatively simple DIY job and can often solve persistent leaks.

If you're not comfortable performing these steps or if the leak continues after trying these solutions, it would be best to consult a professional plumber. They can diagnose any hidden issues and ensure a proper fix.