Looks like yours is just an on/off switch..unless the loop is a ca or ba standard they are supposed to be air gapped to stop backflow. ie the flexible pipe taken off..but mine is always attached.
Your system is full so if you cannot hear water going in then the incoming water pressure in the system has reached equilibrium with the system..1-2bar is a good to high mains pressure these days 0.7 is the minimum according to the law.so if you are at say 1.5 bar in the system then you have reached mains pressure. Water pressure varies according to the time of day...2am no drain on the water network 3 bar ...7.30am toilets and showers going like the clappers 1 bar if you are lucky...
The only other option is the pressure gauge has a bit of crud in it and its undererading the system pressure. To test that you would need to drain down enough to get shot of the pressure...1 rads worth possibly more then refill.
Your system is full so if you cannot hear water going in then the incoming water pressure in the system has reached equilibrium with the system..1-2bar is a good to high mains pressure these days 0.7 is the minimum according to the law.so if you are at say 1.5 bar in the system then you have reached mains pressure. Water pressure varies according to the time of day...2am no drain on the water network 3 bar ...7.30am toilets and showers going like the clappers 1 bar if you are lucky...
The only other option is the pressure gauge has a bit of crud in it and its undererading the system pressure. To test that you would need to drain down enough to get shot of the pressure...1 rads worth possibly more then refill.
