In message , Steve Walker
writes
On 01/08/2018 21:42, Tim Lamb wrote:
In message , Jim K
writes
Tim Lamb Wrote in message:
OK so I finally got around to installing some toilets.

An earlier decision to use mains water is leading to noise where the
isolator valve is used to control cistern water flow to less than the
overflow will handle.

Any suggestions? An inline restrictor of some sort?

Are these valves the farty little screwdriver slot service valve
things? If so try a bigger bore type.
Yebbut... I think the issue is restricting the flow rate by creating
a vortex/slot.

The French use isolating valves specifically for toilet cisterns and
they seem to work better to adjust the flow, as they are not ball
valves:

https://www.leroymerlin.fr/v3/p/prod...ie/equipement-
wc-et-accessoires-de-robinet/robinet-d-arret-wc-l1308217699

A pressure regulator and restrictor would do a better job but there
are 3 bogs and you are required to fit an isolating valve anyway.
Bar showers have restrictors fitted. I just wondered if there was an
easy fit, in line job. Perhaps those microbore tap connectors have
their uses after all.

The above link shows right-angle and in-line versions.

There is probably something similar in the UK - I just happen to know
them from France and from the toilet that I bought there and brought to
the UK.

Hmm.. not come across anything like that here. Thanks.

--
Tim Lamb