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Simplified total dynamic head tdh calculation worksheet

Total dynamic head calculation 2026

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The document ANSI/APSP-7, 2006 outlines three methods for determining the maximum system flow rate for swimming pools, focusing on a simplified Total Dynamic Head (TDH) calculation. It provides detailed worksheets and calculations to assess pool volume, turnover time, maximum flow rates, and necessary pipe sizes while considering factors like friction loss and pump selection. The document emphasizes compliance with minimum flow requirements per skimmer and includes guidelines for auxiliary loads on filtration pumps.

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Click ‘Get Form’ to open the Total Dynamic Head Calculation Worksheet in the editor.
Begin by calculating the Pool Volume. Input the Surface Area and Average Depth in the designated fields, then multiply these values by 7.48 to convert cubic feet to gallons.
Next, determine your preferred Turnover Time in hours. Enter this value and multiply it by 60 to convert it into minutes for further calculations.
Calculate the Maximum Flow Rate by dividing the Pool Volume (in gallons) by the Turnover Time (in minutes). Fill in each field accurately for precise results.
For Spa Jets, input the number of jets and their flow rate per jet to find the total jet flow rate.
Finally, assess pipe sizes based on maximum system flow rates and ensure all friction losses are accounted for in your TDH calculations.

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