I have a GG vacuum tank that appears to be in very good condition(can pull it apart to check)and it's up for sale. The top/valve mechanism is made of brass or bronze,so it's been fixed sometime in it's working life.There is also another one that may be good for spares,eg;brass top,float etc.I'd like $150-00 U.S the pair,plus shipping via seamail or airmail from Australia.Send me a PM for further details or pictures.