Noisy toilet cistern pipe
CHowe 14 Sep 2010
On the last 10 seconds of filling the cistern makes a noise like the QE2 SOUNDING ITS HORN which can be heard next door!
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gices 23 Aug 2011
It sounds like you need a new inlet valve. To see if it's really the inlet valve that is causing the problem, you can open/close the valve when you hear the noise. If the noise changes when you do that, then that's a sign that you need to replace the inlet valve.