needing some help, what would be the best pipe diameter for the pmeumatic piping (its all being used at 10bar), the only 5/2 valve i can seem to find has the biggest size of 1/4, is that the biggest around for low pressure pneumatics.

Also:. im wanting to use a compressor for the air supply, and a buffer tank. does anyone know where you can get a fitting, that replaces the small hose part (which has the fitting which would get plugged into the car tyre) so i can connect it to my push fitting pipes.

also what other saftey stuff would you need for a compressor supplying the air for the pneumatics, gauges etc,

any help will be great

ta
billy