Use for calculating water flow through steel, cast iron, non-ferrous, plastic, asbestos, cement, concrete, vitrified and coated pipes and also open channels in earth, rock, concrete, metal, and wood. One side of calculator solves the rational formula for water flow in pipes and ducts of circular sections with a flow range of 1.5 to 1,000,000 gpm and a diameter range of 0.5” to 240”. The reverse side solves the Manning formula for the flow in open channels with a flow range of 50 to 5,000,000 gpm and a channel area of 0.7 to 2,000 sq. ft. Flow can be read in U.S. gallons/minute, million U.S. gallons/day, cu. ft./second, or cu. meters/second. Also determines velocity in pipes running full. 7-5/8” Diameter calculator is constructed of non-warping, heavy persplex acrylic and is engraved in black, red, and green lettering. Instructions and vinyl case included.
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