I purchsed a valve to fit in a very awkward place under the floor so decided to test it first. With the grey to live, blue to negative and brown to switched live, I cannot get it to open. If put on manual it will switch to automatic when poweredd but that is all. As I cannot get it to open at all, is there some magic that only allows it to open when water is present . simple question is, how can I make sure it will open when in situ?
