Thanks, all. Freezing is not OK, it gets well below zero every winter, no heat on. I drain
down the water system.
Will be testing what my existing water pump (12V from cistern) will do with a rainbird, not
expecting too much. Perhaps a pair or three of them in parallel would give enough to run a couple
of rainbirds. In Canada, with huge pines pretty near to homes, but with a lake for water and a gasoline
or propane engine powered serious pump, they report 90% save rate with a pair of rainbirds, one
at each roof peak. Ideally turned on 4 hours prior to fire to wet a 40 ft radius or more. Requires someone
on site, too.
With two small rainbirds using 2.5-5 gpm depending on pressure, and a 2000 gallon cistern, that
would support them for 6 hrs and 40 min at lowest flow, 3:20 at higher flow. Either one would
likely give a huge benefit to our small 20x40 foot cabin. So, will be looking at the pumping issues. For
remote activation, gasoline or propane engine pumping is pretty much out. Electric is pretty limited due to
solar/batteries, may upgrade that. Willing to spend a bit to increase protection. But that is largely
dependent on whether I can figure out remote triggering sensibly. Probably get phone line, DSL,
a couple of net security cams and an Arduino control system up and running first. That is pretty minimal
cost, and is the key to the whole thing.
Anybody out there play with Arduinos?
Bill