Mandatory Cleaning Of The Drain Valve; Figure 3. Drain Valve Maintenance - Nortec NH Series Installation Manual

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.
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Figure 3. Drain Valve Maintenance