| 摘要 |
A body of water in a water tank located adjacent the upper rim of an above-ground swimming pool is connected by a pipe to a body of water in the swimming pool. The water levels in the pool and in the tank are thereby equalized; and a water supply line connected to a float valve in the tank provides make-up water for the swimming pool when the water level in the pool falls below a predetermined height of the water level in the tank. The pool water level can be established and maintained at any desired height by suitably elevating or lowering the tank in accordance with calibrated indicia.
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