TN 106.7- Catching a Hydrant Part 2

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Questions and Answers

What is the most common method used by TFS crews for laying hose?

Pump operator signal

Dynamic hose lay

Static hose lay (correct)

Hydrant flush

What is the primary purpose of flushing the hydrant?

To shut down the water supply

To connect the hose lines to the hydrant

To load the hose onto the apparatus

To confirm the hydrant is operational and remove sediment and debris (correct)

What is the role of the gate valve in flushing the hydrant?

To connect the hose lines to the hydrant

To control the flow of water in case of a hydrant failure (correct)

To load the hose onto the apparatus

To shut down the entire fire scene water supply

What is the disadvantage of the static hose lay method?

Distances from the hydrant can be a challenge, especially when flow rates increase Signup and view all the answers

What is the first step in the static hose lay method?

The apparatus arrives on the scene of a fire Signup and view all the answers

What is the purpose of the hydrant kit bag?

To carry the necessary equipment for connecting to the hydrant Signup and view all the answers

What is the first step in connecting to a hydrant?

Remove the 65mm hydrant cap furthest from the fire scene Signup and view all the answers

What is the purpose of the colour coded rings on 65mm hydrant ports?

To identify hydrant flow capabilities Signup and view all the answers

Why should pump operators consider friction loss in the 100mm supply line?

Because friction loss affects pump intake pressures Signup and view all the answers

What is the recommended practice when water demands are high?

Having pumpers located within 15-metres of a hydrant Signup and view all the answers

What is the first step in shutting down the hydrant?

Ensure the pump operator no longer needs a hydrant Signup and view all the answers

Why should apparatus attempt to use separate water mains when possible?

To ensure each apparatus has an independent water supply Signup and view all the answers

What is the purpose of releasing residual pressure in the hydrant?

To ensure the hydrant is draining properly Signup and view all the answers

What should be done if a hydrant cannot be shut down?

Notify the Works Department immediately Signup and view all the answers

Why should a minimum of two 100mm supply lines be attached to the pumper at some incidents?

To meet water demands at incidents with multiple hose lines Signup and view all the answers

What is the purpose of draining the hydrant after use?

To ensure the hydrant is ready for future use Signup and view all the answers

Study Notes

Static Lay

In a static hose lay, the apparatus arrives at the fire scene and supply hose is dragged by a firefighter from the apparatus towards the hydrant.
This method is commonly used by TFS crews due to the hydrant spacing in Toronto.
The method has its disadvantages, such as distances from the hydrant, especially when flow rates increase.

Flushing the Hydrant

Flushing the hydrant confirms the hydrant is operational before committing equipment to it.
Flushing removes sediment and debris prior to connecting hose lines and prevents them from entering the pump and attack hose lines.
Flushing is done in a controlled method using a gate valve, in case of a hydrant failure.

Steps to Flush the Hydrant

Remove the 65mm hydrant cap furthest from the fire scene and attach an open 65mm gate valve with 100mm Storz adapter.
Fully open the hydrant, with your body positioned away from hydrant outlets, and observe the water stream until it becomes clean and clear.
Shut down the hydrant until water stops flowing and close the gate valve.

Connecting to the Hydrant

TFS uses color-coded rings on 65mm hydrant ports to identify hydrant flow capabilities.
Remove remaining hydrant caps and connect a second 65mm gate valve with 100mm Storz adapter to the 65mm hydrant port and ensure it is closed.
Connect the 100mm hose to the hydrant Storz connection, and signal or radio the pump operator to confirm the hydrant has been secured.

Maximizing the Hydrant

Use all available ports on the hydrant to maximize its water supply potential.
At incidents with more than two hose lines, use a minimum of two 100mm supply lines attached to the pumper from the hydrant.
When residual intake pressures approach 140 kPa, attach another 100mm supply line to the pumper from the hydrant.
Note: At no time should two apparatus be connected to the same hydrant. Apparatus shall secure their own water supply, independent from others. Apparatus should attempt to use separate water mains when possible.

Shutting Down the Hydrant

Ensure the pump operator no longer needs the hydrant and has closed the intake valve.
Close the hydrant operating stem (clockwise) and release residual pressure.
Remove all hose lines and appliances, and ensure the hydrant has no more water coming from it.
Report the location of the hydrant to TFS Communications for hydrant servicing.