Syringe air and water flow are controlled by
two pinch valves in the chair back (see Figure 5).
Remove the four chair back cover screws, then
remove the cover to access the pinch valves
(see Figure 4 on page 5).
Move the Master On/Off toggle to the ON
position and make sure there is air and water
pressure to the syringe. To adjust the water flow,
press the left syringe button and turn the water
pinch valve clockwise to decrease flow or
counterclockwise to increase flow. A strong
water flow is recommended.
Push both syringe buttons (the spray position)
and adjust the air flow pinch valve to achieve the
desired spray.
6
Decade 1021 Vac Back Chair
Syringe Air and Water Pressure
Figure 5. Syringe Pinch Valves
WATER FLOW
PINCH VALVE
AIR FLOW
PINCH VALVE
TUBING WITH
RIB (air)
2625 DB Doc, 1021 Vac Back 10/15/99 7:29 AM Page 6
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