How do I lower that 
turn unit on-
Press AND HOLD both up & down buttons together for a few seconds until a figure is displayed- (this is the cut of value/number)
Press & hold these two buttons again & the above value will start to flash.
While the values are flashing, this is when you can change the setting with the up/down buttons.
select a value & then YOU MUST turn the unit off & then back off again to "store" this new setting.
NOTE------- the values go from low to high 123456789ABCDEF.
You might have to play a bit to get it just right. I use 8mm hose so my settings will be lower than with 6mm hose but as a guide mine are- 7 in winter, 6 in summer & 5 with heated water.
Hope that helps.
