I'm about to refill my lost coolant. I'll be adding Prestone Extended Life in 50-50 dilution.
We have very hard water, should I use distilled water to refill?
Also, what are the specs of the hose that goes from the refill tank to the overflow tank?
Cannot find it on the Bus Depot site.

I asked at O'Reilly and all they had of the right size was fuel injection hose at $4.50 a foot. I would need 2 feet (really I only need about 20 inches).

David (1987 Wolfsburg)

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