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How the ANSI APSP-7 Standard for Suction Entrapment Avoidance

How the ANSI APSP-7 Standard for Suction Entrapment Avoidance 2025

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The document outlines the ANSI/APSP-7, 2006 standards for calculating the maximum system flow rate for swimming pools. It includes a simplified Total Dynamic Head (TDH) calculation worksheet, detailing steps to determine pool volume, turnover time, and maximum flow rates for skimmers and spa jets. Additionally, it provides guidelines for pipe sizing to maintain appropriate water velocity and friction loss calculations. The document emphasizes compliance with safety standards and proper installation practices for pool equipment.

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Click ‘Get Form’ to open it in the editor.
Begin by calculating the pool volume. Enter the surface area and average depth to determine the total volume in gallons.
Next, specify your preferred turnover time in hours. Multiply this by 60 to convert it into minutes for further calculations.
Determine the maximum flow rate by dividing the pool volume by the turnover time in minutes. Ensure you meet the minimum flow rate requirement of 35 gpm per skimmer.
Fill out details regarding spa jets, including GPM per jet and total jet flow rate, if applicable.
Complete sections on pipe sizes and friction loss calculations based on your system's specifications.
Finally, review all entries for accuracy before saving or sharing your completed form.

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We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

What is the best way to prevent water entrapment?

SUCTION ENTRAPMENT HAZARD: To avoid serious injury or death, the pool or spa shall be closed to bathers if any suction outlet cover/grate is missing, broken, or incorrectly installed. There is no backup for a missing, damaged or incorrectly installed suction outlet cover/grate.

How to reduce suction entrapment in pool?

To avoid suction entrapment dangers, follow these important rules: Invest in newer pool and spa drains. These are designed so they cant be fully obstructed. anti-entrapment drain covers. Drain covers are an essential part of swimming pool safety. Know how to shut down power to your pool.

What is the ASME Code for suction fittings?

Addenda to ASME A112. 19.8-2007 : suction fittings for use in swimming pools, wading pools, spas, and hot tubs.

What is suction entrapment in a pool?

At the top of the skimmer is a valve called the skimmer valve which works to regulate the amount of suction in the system. This valve can be adjusted to regulate the amount of suction and ensure that the pool filters are always running at the proper speed.

How to reduce suction entrapment?

it is strongly recommended that you use an approved anti-entrapment cover, and also do one or more of the following: eliminate the drain or reverse the flow add a second, properly spaced outlet (drain) an SVRS (safety vacuum release system) an automatic pump shut-off system a suction