Flowed Hydrant Grid

This grid allows you to document flow test data and determine the total volume released from each of the flowed hydrants. To add a flowed hydrant record, complete the following steps:

1. Right click in the grid and select Add Record. The following window will appear:

   

2. Select a hydrant from the pick list.

   Note: The hydrant class you selected in the Residual hydrant record (i.e. the main record) will determine what hydrants are available in the pick list.

3. Enter the pitot pressure reading.

   Note: This field must be populated for the Discharge or Q to be calculated.

   Note: If you know the orifice factor, skip ahead to step 5.

4. To calculate the orifice factor, enter the nozzle size and Q coefficient.

   Note: The Unit Conv Factor field defaults to 29.8 SAE  (0.111 SI); however, you can modify this number. All three of these fields must be populated for the Discharge or Q field to be calculated. The Discharge or Q will then be calculated as follows:

   Discharge = Unit Conv Factor * Q coefficient * (nozzle size)2 * square root of Pitot Pressure reading

5. Enter the orifice factor. The Discharge or Q will then be calculated as follows:

   Discharge = Orifice Factor * square root of Pitot Pressure reading

6. Enter the start and ending times- the Total Test Time field will be auto-calculated (in minutes) based on the data in these fields. You can also manually enter a time in the Total Test Time field.
7. Upon entering a total test time, the Volume Released field will then be calculated as follows:

   Volume Released = Discharge * Total Test Time

8. Click to save the record.
9. Click to close the window.