Couldn't find anything in the book.
Found it low last week - dunno how low, just that rez was empty.
Added to the "Hot" line twice. Now I just added the last of that gallon I
bought and it didn't quite make it to the "hot" line this time.
Starting to wonder if I'm losing fluid. OTOH, if it were *really*
low and the
capacity is five gallons or so, maybe eating up that gallon isn't so