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Relay Pump Operations: Who Says It's Just for the Long Lay?
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Paul Shapiro
Paul Shapiro specializes in the research, development and training of large flow water delivery systems and fire stream management. His extensive research and outcomes of large diameter hose has been published frequently in fire service trade magazines. Paul has made significant contribution to fire response efficiency with his application-based research of large caliber fire streams working with handline and master stream operations.
Paul has been involved with the fire service since 1981, and is serving Las Vegas as an Engineer with the City of Las Vegas Fire & Rescue. In March of 2007 his department gave him the Engineer of the Year award for 2006. He is a certified Fire Instructor III for the State of Nevada, has served on the faculty of many Fire Academies throughout the United States, and was named Instructor of the Year, 1999, by the Colorado Fire Academy. Paul is recognized nationally as an expert in his field, and is also the author of the popular book, Layin’ the Big Lines as well as the producer of the video, Large Flow Water Delivery.
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The use of the HRV, as with any water flow appliance, will have friction loss within itself that will have a direct affect on the flow potential for the operation. There are different designs of HRVs. Some have more pronounced friction loss in the supply line mode (no pump at the hydrant, hydrant pressure only) and others in the relay pump mode (pump at the hydrant to set up in relay), while others have friction loss in both modes.
The flow tests will reveal what I consider to be an insignificant flow loss in the HRVs, which is well worth the trade off when you consider what the HRV allows us to do, which is hooking up to an existing supply line without shutting the hydrant down.
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| The initial supply line is laid from the hydrant using the Humat valve. |
Las Vegas Engine 4 using the Humat valve in a relay pump operation
