Cistern issue.

[scooby1]

Thanks for that @Rodders53. Very helpful. And thank you for the links - I'll go and have a look at them both.

Which valve? Th fill valves afaik are all the same be it 99t or similar. Flush valve as I said if possible go for optima 49, if you need a cable I think it’s optima 50. Have a look on Siamps website.

Thank you @Stuckinarut. Sorry, I am only just getting used to the idea that there are 2 valves in the cistern ! I did work on one of the other cisterns a couple of years ago and the flush valve was operated by a push rod but the cable mechanism looks as if it might be more complicated. Is it one cable or two ?

 

[CountryFan]

Thank you @Stuckinarut. Sorry, I am only just getting used to the idea that there are 2 valves in the cistern ! I did work on one of the other cisterns a couple of years ago and the flush valve was operated by a push rod but the cable mechanism looks as if it might be more complicated. Is it one cable or two ?

One cable. Iirc (I mainly work on boilers/heating now) there’s 2 flush settings on the valve that determine the flush and volume.

 

[scooby1]

One cable. Iirc (I mainly work on boilers/heating now) there’s 2 flush settings on the valve that determine the flush and volume.

Thanks again @Stuckinarut. I will have a closer look now that I have been given more info.

 

[scooby1]

UPDATE. Firstly, my sincere apologies for this late update but lots of other things have been going on. But I am happy to report that I think I have been very lucky. I removed the flush valve and then removed the seal, really just to make sure that I would be buying the correct size but I could not find any holes, cracks, or any other fault. The rubber was correctly mounted and not above the plastic legs that it is supposed to sit under. And so I put it all back together and hey presto : it all worked perfectly. I can only assume that there must have been a bit of rubbish or lime scale preventing the valve from seating properly.
And I do agree with @Stuckinarut with regard to the cable type of cistern. I have repaired the "rod" type previously and they are much less fiddly than the cable type.
Sincere thanks for all those people who have been helping me.

 

[ChrisJP]

Good to hear that you've fixed the issue.
But yes, modern dual flush cable or air pressure operated flushing systems are quite complex, and prone to leakage into the toilet which can then go unnoticed for a long time.
I assume these systems replaced the older, very dependable, siphon flush system which cannot leak into the toilet, because siphons don't work well (or at all ) with the modern very small volume cisterns.
The irony is, these small volume cisterns were mandated in a bid to save water, but their propensity to leak water unnoticed rather defeats this aim!

 

[scooby1]

Good to hear that you've fixed the issue.
But yes, modern dual flush cable or air pressure operated flushing systems are quite complex, and prone to leakage into the toilet which can then go unnoticed for a long time.
I assume these systems replaced the older, very dependable, siphon flush system which cannot leak into the cistern, because siphons don't work well (or at all ) with the modern very small volume cisterns.
The irony is, these small volume cisterns were mandated in a bid to save water, but their propensity to leak water unnoticed rather defeats this aim!

Thankyou @ChrisJP. Yes, quite a lot of the modern stuff today creates more problems than what we used to have to work with. Take all the gadgetry that we have in modern vehicles as an example. I don't use half of what is available in my pickup. It's a work vehicle for goodness sake - if it aint broke - don't fix it ! Sorry, rant over.