I maintain a very old system that has a Doubler installed because the zone wire went bad under the road and there were no spares.
The Doubler works but, as you know, each respective zone only comes on every other cycle, it is aggravating to start the zones manually, etc.
I am thinking about replacing it with an Add-A-Zone. Do any of you have experience with them and do they work as advertised?
Thanks / Regards,