the pump supply's the pressure, the resivoir supply's the fluid, the valve dirercts the fluid into the cylinder, to extend or retract the cylinder.
Hard to know exactly what you're getting at. Circumference usually refers to a circle, but judging by the dimensions you have provided, it sounds as though you're talking about a rectangle. If so, then the "circumference" (perimeter) of your 458M by 69M rectangle is obtained by simply adding the four sides. (458+458+69+69=1054)
== == Two possible problems............... The main shut off valve in the house is closed from the in-coming city water supply line, or the city supply line is shut off at the street .