Prime Loop

Prime Loop turns siphon flow into a hands-on transparent water-path puzzle. Drag tube ends between cups, press the primer bulb, clear trapped bubbles, lower the drain end, shape the crest, and rescue broken flow while a blue water column shows why siphons need priming, height difference, and continuity. Each flow report comes from your final tube path, so the siphon feels like connected water in motion. Open Prime Loop and keep the water linked.