TruDesign Vented Loop Solenoid Valve Only 12V – Replacement Anti-Siphon Valve

Maintain reliable anti-siphon protection with the TruDesign 12V Solenoid Valve (Vented Loop Replacement)—a genuine replacement component designed to restore full functionality to TruDesign solenoid-controlled vented loops.

Specifically engineered for marine use, this normally-open solenoid valve is designed to close only when powered, allowing full airflow during standby and sealing the vent during operation—such as toilet flushing cycles—to prevent unwanted air ingress.

This function is critical in systems like marine toilets, holding tanks, and engine cooling lines, where maintaining consistent flow without air disruption is essential.

Constructed from marine-grade composite materials, the solenoid is fully corrosion-resistant, UV-stable, and chemically resistant, ensuring long-term durability in harsh saltwater environments.

Designed as a direct replacement part, it integrates seamlessly with existing TruDesign vented loop assemblies—making it an ideal solution for maintenance, repairs, or system upgrades without replacing the entire unit.

Supplied with pre-wired flying leads, installation is straightforward and compatible with standard 12V onboard electrical systems.

Key Features

• 12V replacement solenoid valve – restores vented loop functionality
• Normally open design – requires power only to close
• Prevents air ingress during operation – ideal for toilet flush systems
• Marine-grade composite construction – corrosion & electrolysis free
• UV & chemical resistant – built for harsh environments
• Supplied with wiring leads – easy installation
• Genuine TruDesign replacement part – ensures compatibility

Specifications

• Brand: TruDesign
• Product Type: Solenoid valve (replacement)
• Voltage: 12V DC
• Operation: Normally open (closes when powered)
• Material: Glass-reinforced nylon composite
• Compatibility: TruDesign vented loop with solenoid systems
• Installation: Inline replacement within vented loop assembly
• Wiring: Pre-installed flying leads

Ideal Applications

• Marine toilet inlet systems
• Holding tank discharge systems
• Engine and generator cooling lines
• Replacement or repair of vented loop solenoid systems

This component is essential for ensuring your anti-siphon system operates correctly, preventing both flooding risks and poor system performance.

Why Buy from Barton Marine NZ?

• Trusted NZ marine plumbing specialist
• Fast nationwide delivery
• Genuine TruDesign NZ-made components
• Ideal for maintenance and repairs

Pro Tip 

For best results:

• Replace the solenoid if you notice air entering during flush cycles
• Check wiring connections and voltage supply before replacement
• Consider servicing or replacing the full vented loop assembly if heavily worn