Cistern inlet valves control the water flow that refills the toilet after each flush. When they wear out, water keeps running and the cistern never stops filling. This Waterford property had a toilet that would not stop running. Our plumber checked the inlet valve and found it needed replacing. The repair was straightforward once the faulty part was identified. S&J Plumbing and Gasfitting sorted it quickly for this Palm Lake Resort resident. Tap and toilet repair often comes down to worn components inside the cistern. Book online if your toilet keeps running between flushes.