The length of the paddles is very important:
a. If the length is too short, the switch may not contact or if the flow rate is very strong, the
paddle may deform.
b. If the length is too long, the paddle may touch the internal surface of the pipe and becomes
stuck inside.
As a general rule of thumb, the length of the paddle should be at least 5 mm above the
bottom of the pipe surface.
PIPE
At least 5 mm
paddles
distance
The flow switch is also mounted vertically with the paddles in a downward position. It is screwed
into the connecting piping (1-1/4") via a tee adaptor.
screw thread: apply PTFE white tape
Flow
Tee
Section 12 Page 142
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