Try progressively closing the tap on the main inlet a half turn at a time to
see if this resolves the problem.
| Whenever I flush the toilet I get a loud sound throughout the house which
| continues until the loo cistern fills up.
| Any idea why?
It very much sounds as though the valve is sticking. If you turn off the
water and unscrew the valve, you will probably be able to find sediment
around the diaphragm. This is what I found anyway and cleaning it may it
work properly for about 6 months but it started again, so I fitted this and
never had any trouble since. It is much quieter when filling as well. It
comes in both bottom and side entry.
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