What type hydrant assist do you prefer ? 

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We have looked at the Kochek assist valve and the Humat Valve.

We have adequate spacing that we don't use hydrant assist valves.  We use split 5" LDH lays if required and sometimes lay in dry with the 2nd-due engine relaying without a hydrant assist valve.

 

For relays or direct hydrant connections, we sometimes use a 2.5 inch gate valve on one of the 2.5 inch hydrant discharge ports and later add a 2.5 inch line to the auxiliary intake, but the need for that is rare with our water system.

What possible difference will a hydra-assist valve make if you have a water sytem failure?  Is the enginge that hooks to the valve going to manufacture water to supply to the attack engine?

 

When planning for a water system failure, you need to carry hard sleeve/suction hose and a map of your static water sources, not a hydrant assist valve.

 

Our entire system (FD, water system, FD water supply practices) are designed to fit together.  We have excellent response times, excellent 2nd-due response times, a good water system with excellent hydrant density, and the ability to use an alternate, non-potable hydrant system in key parts of our response area.

 

We have had single hydrant failures, but with hydrant spacing typically at 400 feet, we are rarely more than 4 sections of LDH from a 2nd-due water supply source.

You might want to give TFT a look. They have a new assist valve. I've seen it in Fire Apparatus Magazine and watched the videos. Might be another one to consider.

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