Quote Originally Posted by RochdaleLad
It's a lot of pumps, believe me. Plus, you don't fill a gun from empty anyway... Usually 120BAR to 190 was the norm with my S400...

But, having said that, try pumping a Rapid 400cc bottle up to 2500psi from empty! SOD THAT.
he,he... the lad i bought my d/bottle and pump...
(both s/hand bargains for one price ) told me, a few of his mates used to top up there 12ltrs with a pump (very not recommended) as dive shop miles away
pumps work, but are hard work... keep mine for back-up when bottle low... whick aint very often (thank god!)