How can I fix the refill mechanism?

Thank you

Have stripped the valve down and found a split in the cup washer.
Could that be the problem?

Mark
August 2010

Could be lime build up in the silent fill tube if it has one.
Could be lime build up in the inlet valve
Turn water feed OFF to cistern and remove the float arm open the end cap, big knurlend nut on end of the valve , [if the plastic type valve] remove washer and while at it replace it. Re-fit and turn water back on you should see/hear a good flow.
I had this problem and it was lime build up.

Bob
August 2010