TruDesign Composite Ball Valve – ISO Certified Marine Seacock (BSP)

Control your onboard water systems with confidence using the TruDesign Composite Ball Valve—a high-performance, corrosion-free marine seacock designed for reliability above and below the waterline.

Manufactured in New Zealand from glass-reinforced nylon composite, this ball valve delivers exceptional strength, impact resistance, and lightweight performance, without the corrosion and electrolysis issues associated with traditional bronze fittings.

Inside, the valve features a precision-engineered PTFE ball and sealing system, ensuring smooth operation and long-term durability even after years of use in harsh marine environments.

Certified to ISO 9093 standards and approved by marine authorities including Bureau Veritas, this valve is suitable for critical applications such as thru-hull installations, bilge systems, sanitation systems, and engine cooling lines.

The quarter-turn handle design allows for fast and easy operation, while the lockable handle ensures compliance with marine safety regulations—particularly for toilet discharge systems.

Available in a range of BSP sizes, TruDesign ball valves are widely regarded as a modern, safer alternative to metal seacocks, offering long service life with minimal maintenance.

Key Features

• Glass-reinforced nylon composite – strong, lightweight & corrosion-free
• ISO 9093 certified marine seacock – suitable above & below waterline
• PTFE ball & seals – smooth operation and long service life
• Quarter-turn handle – quick open/close control
• Lockable handle design – meets marine safety regulations
• Resistant to fuel, chemicals & UV – ideal for harsh environments
• No corrosion or electrolysis – safer than bronze fittings

Specifications

• Brand: TruDesign
• Product Type: Marine ball valve / seacock
• Material: Glass-reinforced nylon composite
• Thread Type: BSP
• Sizes Available: ½″ to 2″ (varies by model)
• Temperature Range: Approx. -40°C to +100°C
• Certification: ISO 9093, IMCI, Bureau Veritas
• Use: Above and below waterline

Ideal Applications

• Thru-hull and seacock installations
• Bilge pump inlet/outlet systems
• Engine cooling water intake
• Marine sanitation and waste systems
• Deck wash and freshwater systems

Composite ball valves like TruDesign are now widely used as a safer, longer-lasting alternative to traditional metal valves, especially in saltwater environments.

Why Buy from Barton Marine NZ?

• Trusted NZ supplier of marine plumbing systems
• Fast nationwide delivery
• Genuine TruDesign NZ-made fittings
• Ideal for NZ boating conditions

Pro Tip

For a complete thru-hull system:

• Pair with a TruDesign skin fitting + tailpiece
• Add a load-bearing collar (for compliance on larger sizes)
• Use marine sealant (Sikaflex) for watertight installation