Guidelines for Vacuum Breaker Installation, Operation and Maintenance
Operation When the water control valve is closed, the vacuum breaker float cup rests on the vacuum breaker seat. [See Figure 2.] In this position, the atmospheric vent is open and the waterway through the seat is closed. When the water valve is opened, the water flow pushes the float cup up off the seat and against the vacuum breaker bonnet. The float cup gasket seals against the bottom face of the bonnet. This seal prevents water from passing through the atmospheric vent and spilling out from underneath the vacuum breaker cover. In the event of a loss of pressure on the upstream side of the vacuum breaker and the resulting creation of a negative pressure in the supply line, the float cup drops back down onto the seat. This opens the atmospheric vent and closes the waterway. This action admits air into the discharge line downstream of the vacuum breaker, thereby preventing the creation of a vacuum and stopping any back-siphonage. An atmospheric vacuum breaker cannot be used in applications where it is subject to continuous water pressure. In addition, the water control valve should not be left open for extended periods of time. Maintenance Contamination of the internal components of the vacuum breaker (e.g. mineral deposits on the float cup gasket or bonnet) may cause a loss of the seal between the float cup gasket and bonnet. Therefore, vacuum breakers should be inspected periodically (at least monthly) for contamination and/or deterioration of the internal working components. Components should be cleaned or replaced as required. RENEWABLE SEAT VACUUM BREAKER BODY COVER SCREWS VACUUM BREAKER BONNET BODY GASKET FLOAT CUP
COVER SCREWS
Figure 2
VACUUM BREAKER BONNET
VACUUM BREAKER COVER
VACUUM BREAKER COVER
BONNET SEATING SURFACE
BODY GASKET
FLOAT CUP GASKET
BONNET SEATING SURFACE
FLOAT CUP
FLOAT CUP GASKET
RENEWABLE SEAT
VACUUM BREAKER BODY
2 1/4”
2 1/4”
1”
1”
30 rev 1110 / © 2010 WaterSaver Faucet Co.
WaterSaver Faucet 701 W Erie St Chicago, IL 60654
312 666 5500 telephone 312 666 5501 facsimile wsflab.com
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