NON-RETURN VALVES - TRUDESIGN

TruDesign non‑return valves are a family of high‑strength, composite one‑way valves built specifically for harsh marine environments. They stand out because they use UV‑stabilised, glass‑reinforced nylon, a stainless‑steel spring, and a very low cracking pressure, making them reliable in bilge, freshwater, and general plumbing systems.

⚓ What TruDesign non‑return valves are designed to do

These valves prevent backflow or siphoning in any onboard water system. Their composite construction makes them resistant to corrosion, pressure shocks, and temperature variation. Key characteristics include:

• Glass‑reinforced nylon body for strength and low weight

• Stainless‑steel spring that won’t corrode or stick

• Low cracking pressure so pumps don’t struggle to push water through

• Full‑flow internal design to minimise restriction

• Printed flow arrow for quick installation checks

• Operating pressure 0–150 psi (max 230 psi)

• Operating temperature up to 93°C

These features make them suitable for bilge discharge, freshwater systems, livewell plumbing, and agricultural applications.

📏 Available sizes and specifications

TruDesign offers both hose‑tail and threaded BSP versions. Hose‑tail models come in:

• 19 mm (3/4") — up to 42 L/min

• 25 mm (1") — up to 79 L/min

• 28 mm (1‑1/8") — up to 79 L/min

• 32 mm (1‑1/4") — up to 117 L/min

• 38 mm (1‑1/2") — up to 193 L/min

• 50 mm (2") — up to 322 L/min

Threaded versions are typically used at outlets to prevent backflow into through‑hull fittings.

🛒 Current product options you can buy

Here are several TruDesign valves available right now:

These cover the most common hose sizes (19–50 mm), with pricing that reflects the size and flow capacity.

🔧 Where they’re typically used

• Bilge pump discharge lines

• Freshwater pressure systems

• Livewell and bait tank plumbing

• Siphon‑prone installations

• Any system needing a corrosion‑proof check valve

Their low opening pressure makes them especially good for manual pumps and low‑pressure electric pumps.

🛠️ Installation considerations

• Install in‑line with the flow arrow pointing toward the outlet.

• Keep the valve accessible for cleaning if debris is expected.

• Use stainless hose clamps on tail fittings.

• Avoid installing immediately after a pump outlet where pulsation is high; a short hose length helps reduce water hammer.