🚰 Mountain Waterworks: Pump Curve, Pipe Friction and Reservoir Balance (2D side view)

2D side view of a pump, rising main, hill reservoir and town. Change pump speed, pipe radius, valve, lift, roughness, demand and leakage, then read the operating point where the pump head meets the system head, the Darcy friction loss and how the reservoir fills or drains. Same hydraulics module as the 3D page, with five in-page numerical checks.