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Home » DIY FAQs » Plumbing » Toilets » Can I test to see if the leak is coming from the refill or the flush valve?

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Yes. Shut off the water supply to the toilet. Mark the water level on the inside of the tank with a pencil. Check the water level in 10 or 20 minutes. If the water has fallen, you know the flush valve is leaking.
 

Related FAQs

  1. How do I replace a damaged refill valve?
  2. How do I test my toilet flapper for leaks?
  3. I think my flush valve is leaking, is there a way to fix this without removing the tank from the bowl?
  4. How do I test to see if water is leaking from the tank into the bowl?
  5. I’ve heard I need to open a shut-off valve (either a ball or a gate valve) before soldering it to a copper pipe. Why?
  6. What is an anti-siphon toilet fill valve?

DIY Encyclopedia

  1. Flush Valve Seat
  2. Flapper Valve Seat Ball
  3. Shutoff Valve
  4. Check Valve
  5. Pressure Relief Valve
  6. Flush Handle
 

Project Finder

  1. How to Replace a Flush Valve
  2. How to Replace a Toilet Fill Valve
  3. How to Repair a Leaking Toilet
  4. How to Replace a Toilet
 
 

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