What difference does it make? This is what Trojan thinks:
How does yours stack up?
And so now you know. I use either kitchen RO or dehumidifier water.
Interestingly, the spec for engine coolant is just as strict as for batteries. Even the smallest trace of seawater leakage can be very bad for separate circuit engines, which is why there is no such thing as long life antifreeze in marine applications. Too much risk of seawater contamination from leaks.
I've had good success at making "battery water" with my water-maker as follows:
ReplyDelete* I make regular water into a container, usually about 3 gallons.
* I then use that water as the feed-water to the RO unit and set my valves up so the the new product water feeds back into the same container. As soon as I start making water from the first pass I reduce the feed pressure to around 200 PSI.
* I let the system make FW from FW for 30 minutes or so.
* With three gallons of 1st pass RO water to start with I get about a gallon of FW that measures with my TDS meter at 20-40 ppm. Not perfect but usable.
Your mileage may vary, and most boats aren't set up to be able to do this but I've had great success over the past three years using this approach. The system of valves and hoses also gives me many options for flushing and cleaning the system.
Patrick
S/V Silhouette
www.svsilhouette.com