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P104.11.1 Inlets
Determine that proper inlet connections have been provided and are in operable condition.
P104.11.2 Flush of Fire Department Inlet Connection and Piping
Use one of the following three methods to remove obstructions and/or debris from the Fire Department inlet connection and piping.
P104.11.2.1 Back Flush
P104.11.2.1.1
With the main system shutoff valve closed and piping to the Fire Department inlet drained, remove or block open the clapper of the check valve in the inlet piping.
P104.11.2.1.2
Flow adequate water from the main system shut-off to the Fire Department inlet to ensure that all debris is cleared from inlet piping, then restore the system.
P104.11.2.2 Forward Flush With In-Line Screen
P104.11.2.2.1
With the main shut-off valve closed and the piping to the Fire Department inlet drained, install a temporary in-line screen at the check valve in the inlet piping. The screen shall be capable of preventing any debris in the dry piping from entering the system.
P104.11.2.2.2
Flow adequate water through inlets to ensure that all debris reaches the in-line screen.
P104.11.2.2.3
Remove the debris and in-line screen from the piping, then restore the system.
P104.11.2.3 Forward Flush With 2-Inch Gate Valve Adjacent to Check Valve
P104.11.2.3.1
If not already provided, install a 2-inch gate valve on the bottom of dry Fire Department inlet piping. Provide for safe disposal of water discharging from the gate valve during piping flush.
P104.11.2.3.2
With the main system shutoff valve closed and the piping to the Fire Department inlet drained, block the clapper of the check valve in the inlet piping in the closed position to prevent water/debris from entering the system.
P104.11.2.3.3
Open the 2-inch gate valve. Flow adequate water through the inlet to ensure that all debris reaches the 2-inch gate valve.
P104.11.2.3.4
Disassemble the check valve to remove debris, then restore the system.
P104.11.3 Flow Test
Fully open the main drain valve. Note the pressure gauge reading before and after the valve is opened. This will indicate closed valves or obstructions in the water supply lines.
P104.11.4 Gauge Tests
Connect a test gauge at the test gauge opening to determine the reliability of existing gauges.
P104.11.5 On-Site Water Supply
P104.11.5.1
Determine that filling for on-site water supply, if provided, operates when a flow test is conducted.
P104.11.5.2
Determine that air pressure and/or water supply gauges, if provided, are in proper working condition.
P104.11.6 Operation Test
Open the inspector's test valve at the topmost or most distant location from the main control valve in the system. The alarm must sound within 90 seconds.
P104.11.7 Valves
Operate post indicator valves, underground gate valves, and OS & Y valves to determine that they are in good operating condition and do not leak.
P104.11.8 Sprinkler Systems Other Than Wet
Automatic sprinkler systems, other than wet systems, shall have their water control valves and their automatic and manual tripping means tested as required by the Chief.

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