you need one of those thingamabobs that screw on the top and bypass the regulator . .it has a valve knob on it .. then really all you need is a hose from that and a foster fitting or probe whatever the case may be .. *AND a bleeder .. ninja has a complete pcp fill setup ive seen for about 90 or you could get just the valve, source a bleeder, a few fittings to plumb it up for probably 40-50 ...