TruDesign Vented Loop Spare Parts Kit – Duckbill Valve, Cap & Cleaning Pin

Keep your marine plumbing system operating safely with the TruDesign Vented Loop Spare Parts Kit—a complete maintenance solution designed to restore the performance of your vented loop.

This kit includes a replacement duckbill valve, cap, and cleaning pin, allowing you to service the critical siphon-break function without replacing the entire unit. Regular maintenance of these components ensures your system continues to prevent back-siphoning, protecting your vessel from flooding risks.

Vented loops are essential in marine systems such as toilet discharge, holding tanks, and engine cooling lines, where they allow air into the system when idle but seal under flow to prevent water re-entering the vessel.

Manufactured from the same glass-reinforced nylon composite as the original TruDesign components, this kit delivers excellent strength, durability, and resistance to corrosion, chemicals, and UV exposure, ensuring long service life in harsh marine environments.

Compatible with TruDesign vented loops in 19mm, 25mm, and 38mm sizes, this service kit is a cost-effective way to maintain system integrity and avoid complete replacement.

Key Features

• Complete service kit – includes duckbill valve, cap & cleaning pin
• Restores anti-siphon performance – maintains safety-critical function
• Compatible with 19mm, 25mm & 38mm vented loops
• Glass-reinforced nylon composite – strong, durable & lightweight
• Corrosion & electrolysis free – ideal for saltwater environments
• Chemical & UV resistant – built for harsh marine conditions
• Easy installation & servicing – no need to replace full loop

Specifications

• Brand: TruDesign
• Product Type: Vented loop spare parts kit
• Components Included:
  • Duckbill valve
  • Cap
  • Cleaning pin
• Material: Glass-reinforced nylon composite
• Compatibility: TruDesign vented loops
• Sizes Supported:
  • 19mm (¾″)
  • 25mm (1″)
  • 38mm (1½″)
• Use: Marine plumbing maintenance

Ideal Applications

• Marine toilet systems
• Holding tank plumbing
• Engine cooling water systems
• Preventative maintenance of vented loops

This kit is essential for routine servicing, ensuring your vented loop continues to function correctly and safely.

Why Buy from Barton Marine NZ?

• Trusted NZ marine plumbing specialist
• Fast nationwide delivery
• Genuine TruDesign NZ-made components
• Cost-effective maintenance solution

Pro Tip 

For best results:

• Inspect and clean your vented loop regularly (every 3–6 months)
• Replace the duckbill valve if it becomes stiff, cracked, or leaking air
• Use the cleaning pin to keep the vent port clear of salt and debris