ES&H Manual

Fire Protection Supplement


Chapter 4: Fire Protection System

Inspection, Testing, and Maintenance Procedure




Appendix 10: 

Procedure for Flow Test of Public Main




1.0             Purpose


Jefferson Lab performs flow tests of the public main on site to ensure its continuous operation. Planned testing ensures irregularities are detected and the risk of deficiencies within the system is mitigated through maintenance.


This testing procedure is conducted in accordance with accepted standards, codes, and manufacturers' recommendations.


2.0             Scope


This document describes the flow test procedure used on street hydrants to test the water supply at Jefferson Lab. It includes test preparation and system restoration. 


3.0             Planning


3.1              Staff Required: 1

3.2              Time Required: 2 Hours

3.3              Equipment Required:

·          Gage cap

·          Fire-Hydrant Wrench

·          Fire Hydrant Data Sheet

·          Pitot Gauge


4.0             Test Preparation


4.1              Establish the fire-detection system impairment using the Fire Protection Supplemental Chapter 5: Fire Protection System Impairment Procedure for detailed instructions on work planning, advanced notification, and administrative controls.

·         Post the ‘Fire Alarm Systems Testing in Progress’ notification signs.


5.0             Conduct the Test


5.1              Attach a gage cap to the No. 1 hydrant, which is located along Hogan Drive (on the north side of Jefferson Lab).

5.2              Open the No. 1 hydrant and record its static pressure (in both psi and kPa).

5.3              Move to the No. 2 hydrant, which is also located along Hogan Drive (west of the No. 1 hydrant).

5.4              Remove the caps from the No. 2 hydrant.

5.5              Measure the diameter of the outlets on the No. 2 hydrant, which are square and sharp.

5.6              Replace one cap on the No. 2 hydrant.

5.7              Open the No. 2 hydrant and record its Pitot reading (in both psi and kPa).

5.8              Return to the No. 1 hydrant and record the residual pressure (in both psi and kPa).

5.9              Shut off the water flow at the water-supply connection near the No. 1 hydrant.

5.10          Shut down the No. 2 hydrant slowly and carefully.

5.11          Replace all caps to the No. 2 hydrant.

5.12          Return to the No. 1 hydrant and record the static pressure (in both psi and kPa). The pressure should be equal to what was measured at the start of the test.

5.13          Shut down the No. 1 hydrant.

5.14          Remove the gage cap and replace it with the regular cap.

5.15          Remove posted notification signs and notify that the flow test is complete.


6.0             Documentation

Data recorded during this annual test is filed with the Fire Marshal.


7.0             Revision Summary


Periodic Review – 01/03/19 – No changes per TPOC

Revision 0.1 – 06/02/16 – Periodic Review; removed reference to archived Chapter 6730 Water Quality Management  

Revision 0.0 – 06/15/11 – Initial content











Fire Protection Department

Tim Minga





This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 1/10/2019.