Hi When we flush our toilet it's fine but it does not fill properly until we turn on tap. If we are using shower when we flush toilet it makes a terrible noise as if there is air in the pipes. We have checked the water pressure on our combi boiler which seems fine. Can someone give us any advise please?

Which ballcock is yours? Tom

Hi Tom

Our ballcock is as the coloured, numbered diagram with the floating ballcock.

Regards

Sue and Allyn

I'm confused. In your heading you tell me ,

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toilet cystern slow to fill up-fills up when we turn on tap

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But in your post you claim,

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it does not fill properly until we turn on tap

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Which is it? Does the fill slow down when you open a tap or does turning on a tap help it fill faster?
Let me know, Tom

Tom,
When you flush the cystern the fill is slow, you turn a tap on eithe hot or cold and then turn the tap off the cystern fills up quickly(normal speed)