hi, I'm just getting started on this project, I have hydrosys basically working so I'm starting on the actual irrigation layout.

I'm baffled with solenoid valves and hoping someone can help.

I'm on my third type, all purchased from Bunnings, and all have the same problem. I'm using the 25mm 24VAC non-latching type, I tried Holman, K-Rain and now Pope and they all have the same problem – when de-powered they won't block water flow.

Am I doing something wrong? These things are pretty simple I thought – apply 24VAC to open, power off to close. I connected them to my water pipe: power off, turn on the water and no water flow – great, as expected. Power up - water flow, great, as expected again. Power off again and still water flow, it won't block or turn off!

The Pope is the worst, you wouldnt even know its off, K-Rain was better it blocked maybe 90% of water, Holman in between.

I tried reducing the water pressure at the tap as well, no change.

Before I resort to the latching type (which I understand aren't supported here?) I'm hoping someone can tell me I'm doing something wrong. Is there an extra step I'm missing?

Thanks for any advice,

Will.