TruDesign Non-Return Valve – Composite In-Line Check Valve (Hose Tail)

Protect your marine plumbing system from backflow and siphoning with the TruDesign Non-Return Valve—a compact, reliable in-line check valve designed for demanding marine environments.

Manufactured in New Zealand from UV-stabilised glass-reinforced nylon composite, this valve delivers exceptional strength, durability, and corrosion resistance, making it ideal for long-term use in saltwater conditions.

The valve features a stainless steel internal spring mechanism, ensuring consistent operation while preventing sticking or corrosion—common issues in lower-quality valves.

Designed with low cracking pressure, it opens easily with minimal flow resistance, maintaining efficient system performance while still preventing unwanted reverse flow.

Its compact in-line hose barb design allows easy installation without additional fittings, making it perfect for tight spaces and retrofits. A clearly marked flow direction arrow ensures correct installation every time.

Key Features

• Prevents backflow & siphoning – protects plumbing systems
• Glass-reinforced nylon composite – strong, lightweight & corrosion-free
• Stainless steel spring – reliable operation, no sticking
• Low cracking pressure – minimal flow restriction
• Compact in-line design – easy installation in tight spaces
• Flow direction arrow – simple and correct installation
• UV & chemical resistant – built for harsh marine environments

Specifications

• Brand: TruDesign
• Product Type: Non-return valve / check valve
• Material: Glass-reinforced nylon composite
• Internal Mechanism: Stainless steel spring
• Sizes Available: ¾″ to 2″ (19mm–50mm)
• Connection Type: Hose barb (inline) or threaded variants available
• Installation: Inline (flow direction marked)
• Use: Marine, agricultural, and general fluid systems

Ideal Applications

• Bilge pump discharge lines (prevents backflow)
• Live bait tank systems
• Freshwater and deck wash systems
• Grey water and waste systems

Non-return valves are essential for maintaining one-way flow, preventing water from flowing back into systems, reducing flooding risk, and improving overall system efficiency.

Why Buy from Barton Marine NZ?

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

Pro Tip 

For best performance:

• Install as close as possible to the discharge point
• Ensure correct flow direction (follow arrow)
• Pair with TruDesign hose tails and clamps for secure connections