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15
LIZ-060 October 26, 2020 Rev03
5.0 USING THE BOOSTER/BOOSTER OSC
5.1 OPERATION AND CLAPPER POSITION INDICATOR
The Booster has no user controls since it functions
automatically when water is supplied from either the Side
A Inlet or LDH Inlet Port C3. Flow through LDH Inlet Port
C3 can be immediately verified by observing the clapper
position indicator that is rigidly connected to the swing-
check valve. Gravity holds the check valve closed unless
water pressure is supplied to LDH Inlet Port C3.
5.2 TYPICAL USE SCENARIOS
The Booster allows a monitor to receive water from either a standpipe or hydrant below using the Side A Inlet, or from another source
that is connected to the LDH Inlet Port C3. Port C3 allows a pump to be connected in line with the source to boost the pressure available
to the monitor. Port C3 also allows an inline eductor or other foam injection system to be attached to supply foam solution to the monitor.
See Section 6.0 on page 21. to estimate the performance of each inlet used independently. Port C3 can serve as the primary inlet to the
monitor during periods when water mains are not operational by providing fire protection using above ground hoses.
NOTICE
To avoid back flow into the water supply:
• The Side A Inlet and LDH Inlet Port C3 must not be used simultaneously.
• Install the TFT Hydrant Under Monitor or Industrial Valve Under Monitor upstream of the Side A
Inlet to isolate it from the water supply when LDH inlet Port C3 is used.
• In addition, the Hydrant Under Monitor offers two LDH outlets that can be used to supply a pump
or foam eductor. See documents LIZ-055 and LIZ-050 for additional information regarding the
TFT Hydrant Under Monitor and Industrial Valve Under Monitor.
Clapper
position
indicator
Figure 5.1
