Noisy satisfying toilet? When the flush is used at my parents house the water scream...

When the flush is used at my parents house the water scream until the systern has bursting back up , one approach to stop it is to turn on the cold tap and slowly turn it down, this will relief the problem but it takes so long to steep the system back up again.Also the stop thump has be turned down but it still makes an awful niose This have only started to come up recently,no problems formerly. Any ideas please.
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Answers:    Hi Collwell
Had impossible to tell apart problem with the toilet subsequent to our bedroom, brought a Torbeck valve froma plumbers merchant or screwfix for going on for a lb10, sorted!, cheap and easy to do, it give the impression of being to have a plastic shoulder bag shaped like a tube which stops the force of the flow so it teem quietly...
be in and working for 5 years..no problem at adjectives..
hope this helps...
How do I know when its time to...
The rubber gaskets surrounded by the water flusher might requirement changing. It that doesn't backing you might have to regulation the whole flusher.