Siamp dual flush button jamming on full flush?

I had the same problem so decided to take the cable out of the cistern carefully removing the plastic 'terminals' at either end and then dismantling them completely with the help of my trusted swiss army knife.

On opening the white plastic terminal (at the cistern end) I found a small spring which I thought might not be up to the job as the cable was quite hard to action manually. It didn't slide well into its sleeve.
I then decided to take the other terminal apart, at the flush-button end, which enabled me to have a proper look at the cable. It still didn't slide into the sleeve as it should have.

After injecting WD40 into the sleeve at both ends and actioning the cable back and forth through the sleeve several time I discovered that there was a build up of gritty deposit along the cistern end of the cable that was making it harder for the cable to slide into its sleeve.

I removed the gritty deposit, put a bit more WD40 on the whole thing, re-assembled (being careful not to break any plastic clips on either terminals) and the flush is now working as it did for the first 3-years of use.

Depending the hardness the water in your area, the way your cistern was installed and so on you could possibly have the same issue. Check the cable out before buying a whole new concealed cistern system would be my advice but be careful not to break any plastic clips as otherwise you will probably have to.

Hope this helps.

ujilne
November 2014

We have 4 of these toilets and all of them have problems. We will phone Siamp to see what they say!!

sparklystar
October 2010

please note siamp offer a tech support and spares dept so any problems call them 0161 205 1200

ian
January 2010

I have two of these units from MFI and yes they have both caused problems from the cable....its a pile of rubbish....careful you replace with 2 inch outlet as you will not be able to purchase a bend

Paul G
December 2009

I have the same problem. It is caused, in my opinion, by a small piece of plactic breaking off the cable wire case where it connects to the button push. I am at present trying to source a supplier of a replacement cable case, but I suspect I will have to buy a complete cistern.

Alan B.
November 2009

I've got same problem - Only had mine installed for a fortnight before it started playing up. The central shaft which is supposed to drop down after a flush and cut off water supply to the toilet hardly ever repositions itself! Water trickles non stop into the toilet until I pushed it back down. I've taken a good look at the mechanics of the cistern and flush and its no wonder theres problems when you see that the whole thing is triggered by a small plastic pin and a wire feed which links to the other shabby pin at the flush end - its a bit cheap and nasty! I dont think any replacements or repairs are even worth looking at. Because the whole thing seems flawed. I'm now going to the expence of swapping the cistern for the old reliable handle flush type...my plumber did warn me!

sticktoapullflush
August 2008

You probably need a new flush valve.
Try www.cisternspares.co.uk

Andrew
February 2008