What factors contribute to static pressure in a water system?

Static pressure in a water system is influenced by both gravity and pump pressure. Gravity contributes to static pressure when water is elevated in a system, as the weight of the water creates pressure at the base of the elevation. This gravitational force helps to establish a baseline pressure that is dependent on the height of the water column.

Pump pressure is also a critical factor, as pumps are designed to increase the pressure of water within the system to move it through pipes and to deliver it to the desired location. This pressure generated by pumps adds to the overall static pressure, especially in systems where water needs to be delivered to higher elevations or through longer distances.

Therefore, the combination of gravitational effects and the pressure supplied by pumps is what defines the static pressure in a water system, making the selection of both gravity and pump pressure the accurate answer. While friction and pipe material influence dynamic pressure and flow rates within the system, they are not directly responsible for static pressure.