Mr.Sandman wrote:since this is your first piston valve id recommend making it inline rather than in a tee.

I only know the tee piston, how does the inline look like/work?

Hi,

I've made a mini combustion gun already:

http://stoned.bplaced.net/img/airgun/IMG_1256.JPG

and a pneumatic with Coke PET as Chamber:

http://stoned.bplaced.net/img/airgun/IMG_1259.JPG

Now, two years later I'm going to make a proper pneumatic gun. I decided to use a piston valve because ...