Nortec NH Series F.Mandatory Cleaning Of The Drain Valve, Drain Valve Maintenance, Page 53, 10-30

F.MANDATORY CLEANING OF THE DRAIN VALVE

(1)Always clean the drain valve before installing a new cylinder since the valve port may be as dirty as the used cylinder. Figure 3 describes the process of removing and cleaning the drain valve. Perform paragraph E. before proceeding.

Figure 3. Drain Valve Maintenance

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Page 53 2008-08-28