Hugh,
A reminder that Calcium Hypochlorite WILL corrode metal stored anywhere nearby. Also, many articles appear stating that you can siphon gas from your gas tank. ALL late model cars and 1/2 ton trucks and vans have a restriction in the filler neck that is designed to prevent leaking gas in the event of a rollover. Siphon hoses will not work in this application. They will work in 3/4 trucks and up, because they fall into different federal class regulations. -F.M.