TruDesign Solenoid Vented Loop 12 V

Safeguard your vessel against siphoning with the TruDesign Vented Loop + Solenoid Valve 12 V—a premium composite siphon-break assembly made in New Zealand. Ideal for toilet, holding-tank, or engine cooling lines, it includes a normally-open solenoid that closes only when powered, preventing air admission during flush cycles and enabling full-flow operation 

Moulded from high-strength glass-reinforced nylon, this assembly is chemically and UV-resistant, corrosion-free, and functions across –40 °C to +110 °C . The integrated diaphragm valve ensures fast siphon breaking and consistent flow without restriction. It installs easily with its three-screw mounting base and includes flying leads for direct 12 V connection. Available in 19 mm, 25 mm, or 38 mm versions to suit any plumbing system.

Key Features:

• Composite 12 V vented loop with integrated solenoid—closes to isolate during flush

• Diaphragm-based valve provides faster siphon break and full internal diameter

• Normally-open solenoid requires power only to close

• Resistant to diesel, petrol, household chemicals, antifouling, UV, heat & cold

• Self-contained three-screw mounting—no brass adapters to corrode

• Easy install with pre-wired 12 V leads

• NZ-made, reliable, and long-wearing—even under marine stress