CampinGazz wrote:
i had a play with the eberspacher water heater in my motorhome yesterday as
my calorifier (hot water cylinder) arrived at last, and i found out just
what a bugger of a job it is to get all the air out of a closed loop system,
snip
Or any other solutions,

It can be nice to be able to simply connect up a hosepipe, and open up
all the drain cocks.