Graeme Tolton
Contributor
Here in Ontario, most, not all shops will refuse 6351 cylinders... Actually, I only know of one who will presently fill them.. I think that has something to do with their large number of rental tanks that are old luxfers. Most of the places that I dive, I cannot get a 6351 tank filled, so The ones that I used to have, I took to the scrapyard after removing the valves.