3 Part toilet syphon range replacement

[DIY67]

My Dewent Macdee Metro 3 part syphon range is failing to flush unless I vigorously crankthe handle. This is either a washer or a plastic valve failure. I can see a replacement on screwfix for £4.99 which seems a good price just to refit new instead of repair. I know some people say you can replace the plastic from a spare bit around the home but for the price it isn’t worth bothcing

https://www.screwfix.com/p/opella-dual-flush-siphon-220mm/20824


The question is, will this be easy to fit without taking the whole top of the toilet off and should it be the right size diameter as I have no way of measuring the width ? If anyone knows of the model I have and can confirm the size I will order from Screwfix. Thanks

 

[Nige F]

You can get the correct plastic diaphragm from Amazon - £ 1,50.

 

[DIY67]

Thanks but I made a plastic piece to fit the old that was perished. Works a treat now.

 

[Madrab]

https://www.stevensonplumbing.co.uk...ahUKEwj_srDw_IzbAhVrAsAKHR83Cp8Qww8IIg&adurl=