“Surestop” water stop cock switch.

[electrofix]

if you use a motorised valve as opposed to a solenoid there will be no power drain unless valve is opening or closing

Dave

[wanji]

Aren’t they usually spring-return, like 2-port heating system valves? (Which by the way I discounted long ago as their working pressure is only 2 or 3 bar). I’ll have a look at motorised valves to see what’s available. If only 240V versions are easy to get I could incorporate an inverter; would be pretty low duty cycle and I’d power it down after activation..

[Author]

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