Unidentified toilet cistern fill valve

[ursusmajor]

Hello all. I have a concealed cistern in which the side-entry inlet flow no longer stops completely. Pictures below. I have adjusted the float depth without resolving the issue. Taking it apart, there is a black washer with some sort of ribs which is perishing, but I cannot see any identifying marks on the unit. So:
1. Any suggestions as to what brand this is? - my best guess is Flomasta, but I cannot find spare washers for that
3. The general recommendation seems to be to replace the whole unit - any recommendations? - ideally I would like a quieter one.
3. Are these now standardised - i.e. is a new one likely to match the screw thread on the one I have taken out, or would I need to alter the connection outside the tank?
Thank you.

 

[CountryFan]

Contact toiletspares.co.uk - very helpful. Looks like this valve : https://www.toiletspares.co.uk/flomas-side-entry-inlet-valve.html, but can’t see any washers available. A new valve would mean whole assembly, if it’s the one linked you could swap out if now washers available

 

[jj4091]

Or google fill "valve washers" and see if you can see a similar one.

 

[ursusmajor]

I never found a washer - searches did not help as washer pictures not clear enough to see the ribs. Thankyou CountryFan for the help - Screwfix had a Flomasta Side-Entry Fill Valve 1/2" for under £10 so I bought that. Sadly, the bit inside the tank had a different size screw thread - maybe standards changed since the original was installed? So replacement was slightly more complicated as the screw thread connection outside the tank had to be changed to the one which came with the new valve. Now all is quiet.

 

[HERTS P&D]

Fit one of these:

Fluidmaster 1/2" Brass Shank Valve

• 1/2" heavy duty brass UK shank• For use in a toilet cistern or storage tank• Ultra quiet• Minimal water hammer• Long life performance• Fast refill

www.toolstation.com

Andy