When I turn the hot tap on the solenoid is in the closed position. As this operates then the low water level sensor opens it again. So if opening the hot tap and the solenoid is closed. It would be gravity?
If it gravity then there has to be a air vent in the cylinder to allow the level to drop to fall enough to open the solenoid valve? maybe it contains a air bubble like the megaflo and the like?
Are there HW draw offs above the cylinder or on the same level?
Maybe worth checking that for scale build up, if its restricted then the flow from any hot tap will be restricted as well except its just a pure vent pipe,, any photo or description of the unit?.
Thanks I think there is a filter in the breather pipe. But there isn't much distance between the bottom of the unit and the hot taps. Only 1meter tops. So 0.1bar.
I have a upstairs "1/2" cartridge tap gravity fed from ~ 0.25M that flows 4.0LPM, so if the water level in your cylinder is, say 0.15M above the tap then you might expect ~ 3.0/3.1LPM.
The distance between the base of the cylinder and the hot tap outlet is around 1meter. So this would give 0.1 bar pressure. What flow rate would this likely give?
If it does flow at a decent enough level. If were to fit dual flow taps. Doesn't mix in tap mixes after leaves the spout. Would single checks not be needed to avoid back flow