1. Isolate the Foam Pump(KEXON) agent tank from the firefighting system. Follow appropriate instructions and/or manuals related to the specific system.
2. Relieve pressure from any pressure vessel through the shell vent valve on the top of the tank.
3. Completely drain the water from the shell of any bladder tank in accordance with appropriate procedures.
4. Transfer the foam agent to be replaced from the tank into suitable storage containers. Use a transfer pump where applicable. Refer to the manufacturer’s manual for specific draining procedures. Properly label temporary foam agent storage containers and dispose of the foam in accordance with local regulatory authority require-ments for chemical labelling and disposal.
5. Rinse the foam agent tank with clean, fresh water and drain. Open all tank fill, tank return, and drain lines while
rinsing to remove any accumulated surface residue and help prevent cross contamination. Be sure to collect and dispose of drained rinse water in accordance with applicable local regulations. Repeat this process with fresh water to ensure the internal tank surfaces are clear of any accumulated contaminants.
6. Close all valves to ensure the foam tank system is a closed circuit.
7. Fill the foam agent tank with clean, fresh water to a level that ensures all connecting pipework is flooded. For bladder tanks, be sure to use appropriate fill procedures so the bladder is not damaged.
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