How to Stop a Toilet Running Constantly

A toilet that won’t stop running is more than just an annoying sound – it can waste hundreds of litres of water each day and send your bills through the roof. The good news is that in most cases it’s a simple fix, and you may even be able to sort it yourself. If not, a local handyman in Blackburn can get it sorted quickly.

Here’s a step-by-step guide to diagnosing and repairing the problem.


Common Causes of a Running Toilet

Most toilets work in the same way: a tank fills with water, a float rises, and when it reaches the right level, the water shuts off. If your toilet keeps running, one of these parts is usually at fault:

  1. Faulty Flapper Valve
    • The rubber flapper at the bottom of the tank controls water flow into the bowl. If it’s worn or warped, water leaks through constantly.
  2. Float Problems
    • If the float is set too high, the tank overfills and water spills into the overflow tube.
  3. Fill Valve Issues
    • A faulty or worn fill valve can prevent the tank from shutting off properly.

Step 1: Turn Off the Water Supply

Find the shut-off valve behind or beside the toilet and turn it clockwise until the water stops.


Step 2: Check the Flapper

  • Remove the tank lid.
  • Flush the toilet and watch the flapper at the bottom.
  • If it doesn’t seal properly, try cleaning it or adjusting the chain length.
  • If it’s damaged, replace it – they’re cheap and available at local DIY stores in Blackburn like B&Q or Screwfix.

Step 3: Adjust the Float

  • Look at the float (either a ball float or a cup-style float).
  • If it’s too high, the water rises above the overflow tube.
  • Adjust it so the water level sits about 2.5 cm (1 inch) below the overflow tube.

Step 4: Inspect the Fill Valve

  • If adjusting the float doesn’t solve it, the fill valve may be worn out.
  • Replace it with a universal toilet fill valve kit – most can be fitted in under 30 minutes.

Step 5: Turn the Water Back On & Test

  • Turn the shut-off valve counter-clockwise to restore water.
  • Flush the toilet a few times and check if the problem is solved.

When to Call a Handyman in Blackburn

If you’ve tried the steps above and your toilet is still running, it’s time to call in a professional. A skilled handyman can quickly identify the fault and fix it before it wastes more water and money.


Final Thoughts

Aconstantly running toilet is one of the most common household plumbing problems. Sometimes a quick adjustment or a cheap replacement part is all that’s needed – but if you’re not confident tackling it yourself, don’t ignore it.

Looking for a reliable handyman in Blackburn?
I provide quick, affordable home repairs and plumbing fixes across Blackburn and the surrounding areas. Whether it’s a running toilet, leaking tap, or general maintenance, I’ll get it sorted fast.

Need this doing in Blackburn? I offer toilet repairs in Blackburnget a free quote.


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