Nortec NH Series - Manual (Page 60)

10-30
Page 53
2008-08-28
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