It's always annoyed me that in most cases your choices are to buy ready mixed coolant, or, gulp, use tap water as part of your mix...as distilled water isn't easy to come by.
Although I haven't used tap water in any of my Xantia's I confess to using tap water in coolant mixes in older cars over the years before that, (albeit in soft water areas) as ready mixed coolant wasn't readily available, nor was distilled water....
But now that I have the dehumidifier I'm thinking I should be saving the output of it in a nice large container so that I can start using concentrate to mix my own. Reading suggests that its not safe to drink because of the possibility of bacteria or viruses in the produced water, and also tiny quantities of metal from the evaporator and condenser can be dissolved in the water, however I'm sure that those quantities are tiny compared to dissolved metals in the coolant in the engine and it should be perfectly good to use ?
Assuming a 50/50 mix and 8 litres total coolant I only need about 4 litres - which the dehumidifier can easily produce in about a day...
