how do i increase the water pressure on a worcester bosch 35cdi II boiler?

Hi the previous instructions are correct but remember its upside down. So as you look at it insert the white tap key and turn to left as far as it goes, about qtr of turn. Then turn the screw next to the key to the left as you look at it. The screw will start to come out and you will hear water flowing.

Mark
November 2008

I am bad at DIY but my plumber just did this. He inserted a white plastic key into the bottom and then turned a grey dial next to it anti-clockwise. The pressure increased and then you reverse the steps and take out the key

N
November 2008