TruDesign composite vented loop marine siphon-break – Barton Marine NZ TruDesign composite vented loop marine siphon-break – Barton Marine NZ
TruDesign composite vented loop marine siphon-break – Barton Marine NZ

TruDesign

TruDesign Composite Vented Loop

$22.90
Tax included.
Size: 3/4"

Prevent back-siphoning and protect your boat with the TruDesign Vented Loop, a marine-grade composite siphon-break made in New Zealand. Ideal for toilet, holding‑tank, or engine cooling lines, this loop relies on a silicone duckbill valve that lets air in—but seals under liquid flow—even when particles are present 

Moulded from glass-reinforced nylon composite, it provides a smooth, unrestricted flow, corrosion-proof longevity, and UV stability across a wide temperature range (–40 °C to +110 °C) . The integrated mount with three screws ensures easy, reliable installation without the need for adapters. Available in 19 mm, 25 mm, and 38 mm sizes—each weighing from 37 g to 147 g depending on size 

Key Features:

  • Silicone duckbill valve: durable and resists hardening 

  • Consistent internal diameter: full flow, no restriction 

  • Compact integrated mounting feet: secure with 3 screws 

  • Composite strength: corrosion, electrolysis & chemical proof 

  • UV-resistant & paintable: no green staining, suitable for sunny NZ conditions 

  • Temperature range: –40 °C to +110 °C 

  • NZ-made reliability: sizes 19 mm (37 g), 25 mm (76 g), 38 mm (147 g) 

Size: 3/4"