My cistern makes a noise every 1 to 2 Min ?

Take the lid off the cistern - operate the flush and watch what happens - on the moving arm there will be a little nylon screw to shut off the water - screw it in to shut the water off sooner - do up the little locknut.

The inside the cistern it may have a "fill-line" for the water level.

Peccavi
April 2011