Re: Slow filling cistern
It sounds like high pressure ball valves. They only have a small jet to let the water through. They have a habit of getting clogged up. It means you have to remove the ball-valve to clear the jet on the outlet. It's a quick job for those who know what to look for. Low pressure ball valves have a much larger hole for the water to come through so you don't get the blocking so much.
George.
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