Gun Freak wrote:It depends on how much you weigh. If you weigh 100 pounds then it can do roughly 314 psi, and if you weigh 200 pounds then it can do over 600 psi. I would guess you weight about 150 pounds so probably an absolute max of 450 psi.
Your math is off somewhere.....or I should stop drinking...one or the other.
1" copper has an id of between .995" (Type K) and 1.055" (Type M).
Using a 1" as a rough average, the area of the piston head would be .785in.sq. ( A = pi *r*r)
Psi = pounds force / square inches, so...
200 lbs / .785in.sq. = 254.8psi.