Through-hull and overboard fittings

Through-hull and overboard fittings involve maintenance and repair of bottom and side fittings and equipment, including:

1. Inspection and repair/replacement of:

• Kingston valves (sea valves)
• Bottom and side portholes
• Through-hull fittings (connecting elements)
• Drain openings
• Scuppers (deck drains)
• Cooling system valves
• Other hull penetrations below waterline

2. Main types of work:

• Dismantling and installation of fittings
• Cleaning from corrosion and fouling
• Replacement of gaskets and seals
• Leak testing
• Painting and anti-corrosion treatment
• Calibration and adjustment of valves

These works are critical for vessel safety since all these elements are located below the waterline and must ensure hull watertightness.