>From page 17-3, 16th edition Fire Protection Handbook, under 'Freezing Temperature and Antifreeze Additives', second paragraph: "The water soluble freezing point depressant in fire equipment most widely used is calcium chloride with a corrosion inhibitor additive. Calcium chloride solutions are not used when fire protection systems are supplied by public water connections. Table 17-1A gives data on the amounts needed for various low temperatures". (60-40 should be good to -50). Talk about 'best solutions'! A pressure tank is an acceptable water supply AND could be the most economical. Wouldn't a Calcium Chloride Loop work similar to an Antifreeze Loop? Would it need an expansion tank? How much does a pound of 80% flake fire protection grade calcium chloride cost (on the street)? Would you need the corrosion inhibitor if you used other than black steel? Is the corrosion inhibitor the big factor in ".not used.public water."? I know it is non-toxic, doesn't that mean no alcohol, hence likely non-combustible in solution? If RPZs keep bad stuff out of city water, wouldn't they keep calcium chloride out too? I hear CALCIUM does a body good, and I have a sodium CHLORIDE shaker I use now and then, but I guess when things get crossed, some weeds die.
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