6
MOORED APPLICATIONS
Preparation
Parts Included in PN 90087 Universal Plumbing Kit
PN Description Quantity
30388 Tygon tubing, 19 mm (0.75 in.) OD, 13 mm (0.5 in.) ID 4 ft
30579 Tygon tubing, 13 mm (0.5 in.) OD, 9.5 mm (0.375 in.) ID - for connections to DO sensor 0.5 ft
30389 Cable tie, 102 mm (4 in.) - to secure tubing connections 20
23337 Pump air release valve - not used for moored applications 1
30387 Tube, 1/2" Y-fitting – not used for moored applications 1
30458 Cable tie, 381 mm (15 in.) – not used for moored applications 2
Tools Required
Sharp knife or scalpel for cutting tubing
Straight-edge ruler for measuring and cutting
Installation
Basic considerations for plumbing installation:
• Use the minimum tubing lengths necessary, but avoid tight bends in the tubing. Tight bends place stress on the
tubing connections at the sensors, which can lead to failures at the connections.
• Do not create any vertical loops in the tubing. Loops trap air, preventing the pump from working properly.
• Secure each tubing connection with two cable ties.
• Configure the system as follows:
¾ Place the DO sensor intake above the conductivity sensor exhaust.
¾ Orient the DO sensor plenum with the intake closer than the exhaust to the sensor body.
¾ Place the pump intake above the DO sensor exhaust.
Failure to configure the system in this manner can trap air, preventing the pump from working properly.
• Place a 13 mm (0.5 inch) long piece of the 9.5 mm ID Tygon tubing at the DO sensor intake and exhaust.
Slide the larger diameter tubing (13 mm ID) over the smaller diameter tubing to provide tight seals.
• If the system does not include a DO sensor, connect the tubing from the conductivity cell directly to the
pump intake.
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