From purchase 1 week ago, Interesting feature is filler cap has tube to approx. half tank height, one can only assume to be certain of sufficient air space. From early settlers home Cheshunt / Rose River area Victoria Australia Graham::
Hi Graham, I was just reading Wizard Lighting Systems instructions. I was surprised that they don't mention to what level you should fill the 'Reservoir', as they call it. The instuctions say pump to 25lbs.