IS-188A/288A/N388
Series 188A, 288A, N388
and LF288A, LFN388
Anti-Siphon Vacuum Breaker
Installation
1. Install 6" (152mm) above
highest point of downstream
piping or hose.
2. No downstream shutoff
valves are allowed.
3. Device can spill water;
install where spillage is not
objectionable.
4. Use only with non-continuous pres-
sure (pressurized a maximum of 12
out of 24 hours).
Maintenance
1. Remove hood screws and lift
off hood.
2. Turn off supply pressure and
observe float drop to open air inlet.
3. If this does not occur or valve has
been constantly discharging
remove bonnet.
4. Replace bonnet (seat) and float.
5. Reassemble (using lubricant
sparingly on bonnet o-ring)
and restore pressure.
6. Retest using steps 1 and 2.
Typical Installation
6" above highest
downstream piping
No
downstream
shutoff
Watts Ball Valve
Anti-Siphon Vacuum Breaker
Hood
Float
Bonnet
Seat
O-ring
Seat
Disc
ASSE
Standard 1001
CSA Certified
Listed by IAPMO
WARNING
!
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can result in death,
serious personal injury, property damage, or damage to the equipment.
Keep this Manual for future reference.
NOTICE
Inquire with governing authorities for local installation
requirements
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