Toilet Cistern Not Filling? Causes, Fixes & What to Check
If your toilet cistern is not filling , the most common causes are a closed or faulty water supply valve, a blocked inlet, a damaged fill valve, or a problem with the float mechanism. Check the water supply first, then inspect the float and fill valve before considering a replacement. A toilet that does not refill properly can leave you with a weak or incomplete flush. Fortunately, many causes are easy to identify and some can be fixed without replacing the entire toilet. Why is my toilet cistern not filling? A toilet cistern (also called a toilet tank) needs a steady water supply and a working fill valve to refill after flushing. If the tank remains empty or only fills partially, one of these components may be preventing water from entering. The most common causes include: Water supply valve is closed or partly closed Fill valve is blocked or damaged Float is stuck or incorrectly adjusted Water inlet screen is clogged Low water pressure Flexible supply line is kinked Internal parts ar...