I have just installed a new electric shower (Gainsborough e50 offered by Me ssrs B and Q for under fifty quid on clearance).
Upon first turning on the water supply, the shower passes water from the ho se outlet. I don't think this should happen as there's no power supply to t he solenoid yet. Twiddling the knobs makes no difference (turning the flow knob reduces the flow but not off completely, which is as expected).
The instructions mention letting water flow before fitting the spray handse t as part of commissioning, but I wouldn't expect water to flow before turn ing on at the on/off button.
I suspect the product may be faulty?
Owain