Description
The header vent plug is used to release low pressure build-
up that may occur in a closed system utilizing selector
valves or check valves. The header vent plug should also
be installed on the cylinder sides of the check valves on
both main and reserve systems to relieve any pressure that
may leak past the check valve and accidentally actuate the
reserve system while the main system is discharging.
ANSUL and INERGEN are trademarks of Ansul Incorporated or its affiliates.
ANSUL INCORPORATED, ONE STANTON STREET, MARINETTE, WI 54143-2542 715-735-7411 Form No. F-2001265 ©2001 Ansul Incorporated Litho in U.S.A.
System Components
UL EX-4510 12-1-01 Page 1-17
Header Vent Plug
Shipping Assembly
Part No. Description
840309 Header vent plug
Component Material Thread Size/Type Approvals
Vent Plug Body: 1/2 in. NPT Male UL Listed (EX-4510)
Brass
Spring:
Bronze
Seal:
Neoprene
SPRING
CHECK SEAL
CHECK CUP
1/2 IN. NPT
000707
STEM
BODY
WASHER
29/32 IN.
(2.3 cm)
7/8 IN.
(2.2 cm)
ANSUL
®
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