hello there.. some ages ago I had bought an 8-station opensprinkler and since I have lots of UTP, I used multiple UTP cables to wire them — using two wires for each station, plus 4 for ground. I soldered them to the AC valves I had.
This worked for some years. But when it rains the valves and therefore the connections I made get flooded and the connections get corroded. Besides, the wires have gotten very brittle and crumbling after years of use.
I need to rewire it basically, but I am not sure what gauge and what type of wires to get. Probably not single-strand copper like I had before with UTP, but multiple strands? How thick can they be before it all stops fitting into the tiny and tight connectors on the opensprinkler?
Is soldering the connections still the best thing I can do?