How often should I inspect and replace the O-rings?

Inspect the Bulkhead O-ring every time you install or remove the connector from the housing. Look for “compression set” (flattening), cuts, or cracks. As a preventative measure, we recommend replacing the O-ring once a year or after any maintenance cycle where the seal was disturbed.

O-rings are cheap; electronics are expensive.

Inspection: Run your fingernail gently over the O-ring. If you feel a snag, replace it.
Flattening: If the O-ring looks square instead of round (permanent deformation), it has lost its elasticity and won’t seal effectively at low pressure.
Spares: Always keep a bag of HYSF Spare O-rings in your toolkit. Don’t reuse an old O-ring just to save $1.

John Zhang

(CEO & Lead Engineer)
Email: info@hysfsubsea.com
With over 15 years of expertise in subsea interconnect technology, I lead HYSF's R&D team in designing high-pressure (60MPa) solutions. My focus is on ensuring zero-leakage reliability for ROVs, AUVs, and offshore instrumentation. I personally oversee the validation of our custom connector prototypes.

Have a complex technical question?

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Whether you need a quick quote for standard connectors or a complex custom cable assembly, our engineering team is ready to assist. Expect a technical response within 12 hours.