I hope I'm posting this in the right place. Anyway, I am buying a timer for my pump and I also have a SWG, and had a couple questions. First, I understand there are ones for a 110 line and a 220 line. I'm not sure which I have for my pump. Unfortunately, my breaker box is not labeled for the 2 breakers that have the double bars (which I'm told would indicate a 220 line) so I'm going to turn on the pump and see which breaker it is. But in the meantime, I understand Intermatic is a good make to get. What does single pole versus double pole mean? Should I look for one that also turns off the heater 20 min before the pump? Is that really necesary? Here's what the site says:
"This two circuit switch is designed to turn off a gas fired swimming pool heater approximately 20 minutes before the filter pump shuts down. Eliminates the problem of pounding and knocking due to overheated water, reduces scale and lime deposits and extends the service life of the heater."
I will love a digital timer but can't afford one right now so it will have to be mechanical. Any recommendations would be greatly appreciated. These were a couple I was loooking at: