Mark _australia said..
^^^ +1
and Macro get a generator. In a bad fire you will probably not have power to run those pumps
Except he did say he was looking at
5.5hp 4 stroke pumps. But I do agree that you can have the best fire protection system in the world, but if it relies on the mains power and don't have a backup, then you might as well not bother.
The first thing to go on country fires is the power because somewhere along the line, a pole burns down and that's the end of your electrics and thus, water supply.
I keep a small 2kw 4 stroke generator on standby over the fire season, all gassed up and ready to go.
If there is a fire nearby it goes into the pumphouse, which has a suitable firebreak around it, and it can then run the existing house pump if needed.
It runs sprinklers all around the house to keep the ground wet.
Even green grass can burn on a blistering hot day so it needs to be wet down.
If you're there, then wet down the gutters and lightly spray under the ridge capping.
Most house fires are started in bushfires because of leaf litter in the gutters and under the ridge cap on the apex of the roof.
Smouldering embers blow into the gutters and ridge capping which eventually sets fire to the leaf litter.
Once started, this then works it's way into the roof space, so it's the small gutter and ridge cap fires that need putting out before they get established.
Also, if there is a fire nearby, keep a ladder ready up against the roof.
If you have to run around finding a ladder then it's probably going to be too late by the time you find it.
Once a fire is in the roof space the house is pretty much gone, so then you can run away.
leaf litter can be sucked out with one of those electric blower/sucker thingies at the start of season, and often about January as well.
They are only about $99 for a cheap one, and that's all you need.
They really suck.

The problem with the mandatory evacuation policy, most house fires start in a very small way, like smouldering leaves in a gutter.
They can be put out very easily with just a small $50 backpack sprayer, so long as you don't get choked in smoke.
If you abandon the house as soon as a fire creeps over the horizon, the chances of you losing the house go up drastically, unless there is a ready supply of fireys on standby just for your house. Even if there are, it helps a lot if you've already done all the right stuff.
I should also add, that if there is no safe place to run to in the event that you can't save your house then keep that in mind when making your decision as to how long you stay.
Have a plan ready.
Don't try to come up with one in a hurry at the time.
Mine is to take my chances and jump in the dam with all the tiger snakes.