5. Open the water supply main drain valve.
6. Confirm that water is not flowing from the water supply main drain
valve.
7. Close the diaphragm-charge-line ball valve.
8. Open the system main drain valve to drain any water that has
accumulated and to release system air pressure.
NOTE: If the system has operated, open the remote system test valve
(inspector’s test connection) and any auxiliary drain valves.
9. Close the slow-fill ball valve on the Air Maintenance Trim Assembly
(AMTA).
10. PUSH DOWN ON THE AUTO DRAIN SCREW TO REMOVE
PRESSURE IN THE DIAPHRAGM CHARGE LINE.
I-NXT.DIA_2
Series 764, 768 and 769
REPLACING THE DIAPHRAGM IN SERIES 764, 768, AND 769 FIRELOCK NXT™ FIRE PROTECTION VALVES
I-NXT.DIA
REPLACEMENT KIT INSTRUCTIONS
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2009 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_A
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