Mix rock salt in your holding tank 50lbs per 1000 Gallons of water untreated water freezes at 0C 23% salt water solution as in sea water freezes at -21C
you will need to put the discharge hose in the water fill and circulate it for about 30 minutes to start with to get all the rocks dissolved then as you add water add more salt, just do a taste test and It is a whole lot cheaper then washer fluid, about $10.00 for a 50# bag.
Re: keeping water from freezing while boring
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