18
6.
Open the water supply main drain valve fully to flush
the water supply of any contaminants.
7
. With the water supply main drain valve fully open,
record the water supply pressure (from the water supply
gauge) as the residual pressure.
8.
Close the water supply main drain valve slowly.
9.
Record the water pressures established after closing
the water supply main drain valve.
10.
Compare the residual pressure reading, taken above,
to the residual pressure readings taken in previous main
drain tests. If there is degradation in the residual water
supply readings, restore the proper water supply pres-
sure.
11.
Verify that all valves are in their normal operating
positions (refer to table below).
12.
Confirm that there is no leakage from the valve’s inter-
mediate chamber. No water or air should flow from the
drip check.
13.
Notify the authority having jurisdiction, remote sta-
tion alarm monitors, and those in the affected area that
the valve is back in service.
14.
Provide test results to the authority having jurisdic-
tion, if required.
Water Flow Alarm Test
Perform the water flow alarm test on a frequency required
by the current NFPA-25 code. The authority having juris-
diction in your area may require that you perform these
tests on a more frequent basis. Verify these requirements
by contacting the authority having jurisdiction in the
affected area.
1.
Notify the authority having jurisdiction, remote station
alarm monitors, and those in the affected area that the
water flow alarm test will be performed.
2.
Open the water supply main drain valve fully to flush
the water supply of any contaminants.
3.
Close the water supply main drain valve.
Valve
Normal Operating
Position
Piston Charge Line Ball Valve
Open
Alarm Line Ball Valve
Open
Alarm Test Ball Valve
Closed
Alarm Drain Ball Valve
Closed
Water Supply
Main Drain
Valve
Water Supply
Main Drain
Valve
• Be careful not to open the system main drain valve accidentally.
Opening the system main drain valve will cause the valve to operate, resulting in
property damage.
Water Supply
Main Drain
Valve
Water Supply
Main Drain
Valve
DISCONTINUED
PRODUCT
