Steve it's from a well known online shop using there fittings as per the way you would install any AN fitting that isn't ptfe lined. It's been fired up on pump grade Ron 98 . I can't see that I've done anything wrong . It's leaking mid section like a sprinkler so I can't even attribute it too the fittings .As of yet the shop haven't deemed my email worth answering even though I've spend a large amount with them on fittings and various pipes and weld on items.