Water Main Chlorination Dose

The chlorine to charge a newly installed or repaired water main the AWWA C651 way: pipe volume, the pounds of available chlorine for the dose, and the product weight at its strength. Flush and pass a bacteriological test before return to service.

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Formula and source

volume_gal = 0.0408 x diameter_in^2 x length_ft; available_cl_lb = (volume / 1,000,000) x dose_mg/L x 8.34; product_lb = available_cl / (product% / 100).

AWWA C651 Disinfecting Water Mains (by name).

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