Hi, if you lift the tank the solenoid is located just to the rear of the tank also you will find the adjustment threads (sorry could not think of the name)
regards

 

Thanks, I got to it but I’ve tightened up as much as I can and it still feels slack, do I need to replace the cables ??

 

Hi you need to check if the cables are connected at the exup valve end, there is a small cover that needs to be removed then you can see the cables attached to the exup valve ..