bikemike
loud pipes save lives
There is another alternative route for some check valves. They do have fuel and oil proof check valves to fit fuel lines in the radio control hobbies I think they go for about 3 bucks each. They are very small and work anywhere where a hose is usedyea mine is shot and likes to suck bar oil in the crankcase , its great for fogging mosquitoes.
Is those parts still available ?