Hi.
Two ways to get radiator suitable water.
1 put out a few plastic containers when it is raining. Or
2 make a simple solar still, there are plenty of instructions of how to build one on the net.
I do not have any problem, as where I live in Australia there is no mains water and we catch rain water off the roof and can store 20000 gallons.
Regards,
Bob Mather.
