Toilet running constantly diagnosis and fixes.
A running toilet can waste 16,000 litres per day adding $200 plus to a quarterly water bill.
Cause 1: Worn flush valve seal the most common cause.
DIY fix costs $10-$25 for the seal.
Cause 2: Float valve set too high causing water to flow into the overflow tube.
Cause 3: Faulty fill valve that does not shut off completely.
Universal fill valves cost $20-$40.
Cause 4: Cracked cistern or bowl requires complete toilet replacement at $400-$800 installed.
Call a plumber if DIY fixes do not work or you have a concealed in-wall cistern..