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Graphite Heather
giving this hat a retro
VGB 2017 – ANSI/APSP – 16 2017 certified
Hazen Williams Bumper Sticker Get yours todayFor those who know the flow, this one's for you. Our "Hazen Williams Equation" sticker celebrates the science behind plumbing and fluid dynamics in a sleek and understated way. Featuring the iconic Hazen Williams equationused to calculate the friction loss in pipesthis shirt is a subtle tribute to the math that keeps the water moving.
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