Hydrotech Classic Series Stenner Basic Service Manual - Manual (Page 21)

20 Maintenance Basics – Tube
Tube leaks around the fitting
• Using pliers which can break internal seals and twist
the tube.
• Turning the fitting inside the tube when centering a
replacement tube or when connecting suction/discharge
lines.
• Using Teflon Tape preventing ferrules from seating into
tube fitting.
• Stress on tube fitting from a tight radius in the
suction/discharge tubing.
• Crushed ferrules from over tightening or use of pliers.
Corrective Action
1. Only finger tighten connecting nut. Do not use pliers.
Do not use Teflon tape. Hold tube fitting when tightening
connecting nut to prevent fitting from turning.
2. Change ferrules with every tube change. Ferrules are the
seal between tube fitting and the connecting nut.