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Waterfall Layout

A Waterfall ...

Pump Section - Water is supplied via a main line and inlet (1), which is controlled by a gate valve for initial filling at the pool. A centrifugal end pump (2) re circulates water through a butterfly valve (3) for adjustment to diverter plates (4) located in the upper pool which evenly spread the water for smooth flow over the weir (waterfall). Water from the lower pool is returned to the pump via an anti-vortex plates (5), butterfly isolation valve (6), and strainer (7), for removal of coarse material and protection of the pump.

Filter Section - Water is filtered by a sand filter (8), which includes a self-priming pump independent from the main fountain group. Water is returned through a gate isolation valve (9) and, adjustable inlets (10), which can be directed to create turbulence in desired areas. Water enters the filter via an anti-vortex plate (11), surface skimmer (12), and a vacuum fitting (13); all connected to a manifold (14). Each of these lines has an isolation gate valve. The manifold is connected to the strainer on a small self-priming pump which re circulates the water from the pool through the filter. Chemical addition is accomplished by use of a small metering pump (15) on a tank which supplies hypochlorite solution. An overflow drain (16) is set to eliminate rainwater, etc., to prevent overflow. The pool can be drained via the floor drain (17), which is controlled by a valve in the valve box.

Electrical Control Section - An electronic water makeup control replaces water lost to evaporation, splashing, etc. This sensor (19) and control (20) actuates a solenoid valve (21) on the main water line to maintain water level. Probes in the sensor are set to detect high and low water limits. The underwater lighting fixtures (22) are base mounted and connected to an underwater junction box (23) by underwater cable. The junction box is conduit-connected to the control box (24), and completely potted to prevent leakage. The fixtures contain integral low water cutoffs. The lights are controlled by a timer or sequencer. The main control box (24) houses the timers for valves and pump operation, light controls, and water makeup controls. In addition, it is the center for power distribution to various components and contains circuit breakers, fuses, motor starters, etc.

This diagram illustrates the circuits and components commonly used in the daily operation of a typical waterfall; including a centrifugal flooded end pump, a filtration and water treatment system, underwater lighting and the necessary electronic sensors and controls.

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