Re: O/T: Using a trash pump on a firefighting rig?

Posted by 135 Fan on May 05, 2007 at 09:40:05 from (68.149.46.121):

In Reply to: O/T: Using a trash pump on a firefighting rig? posted by Blue3992 (N Illinois) on May 04, 2007 at 19:11:41:

Why do you need a trash pump? Any centrifugal pump would work. Trash pumps have very open impellers to allow solid objects to go through. Pressure pumps on the other hand have closed impellers which cause higher pressure. Fire fighting pumps consist of 2 or more closed impellers to increase pressure even more. Just like a 2 stage air compressor. A standard pump like a basic Honda or similar is kind of in between a trash pump and a pressure pump. More pressure equals less flow. A pressure pump would shoot the water further but with a nozzle on a standard pump it would still shoot the water a fair distance. Make sure to use a strainer so you don't get trash in your pump. Most strainers that come with pumps are sized so they will only let through what the pump will pump. Putting a window screen on the strainer helps also. Especially when using a nozzle or a smaller outlet to get some back pressure for spraying. A tapered nozzle works better than an adjustable fire nozzle and doesn't get plugged up if a little dirt gets sucked in the pump. A pump that says high head is the same as more pressure. Look under pumps on the web. It will explain it. Hope this helps. Dave

Replies:

• Re: O/T: Using a trash pump on a firefighting rig? Blue3992 (N Illinois) 11:17:53 05/05/07 (0)

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