Forespar MF 842 Marelon Vented Loop, 3/4" – Anti-Siphon Protection

Safeguard your vessel against dangerous back siphoning and potential flooding with the Forespar MF 842 Marelon Vented Loop. Engineered for critical marine plumbing applications, this essential component ensures efficient fluid management in systems like marine toilets, engine cooling, and bilge pump outlets. Proudly featuring durable, corrosion-proof Marelon, it’s a vital installation for maintaining the integrity and safety of your boat's systems. Upgrade your marine plumbing with Forespar's trusted reliability.

Key Benefits & Features:

• Advanced Anti-Siphon Protection: Integrates a simple valve system that allows air to enter the line when inactive, effectively breaking siphon effects and sealing securely when fluid passes through, preventing back siphoning into tanks or the bilge.
• Corrosion-Proof Marelon Construction: Molded from glass-reinforced Marelon, a high-strength composite polymer, ensuring exceptional durability, zero corrosion, lightweight performance, and UV stabilization for long-term exposure without deterioration.
• Reliable Duckbill One-Way Valve: Designed to seal properly even when particulate matter is present in fluids, ensuring consistent and dependable operation.
• Standard 3/4" Barb Connection: Features a 3/4" (19.05mm) barb size for easy integration into existing marine hose lines.
• Compact & Robust Design: Measures 4-1/2" in height and 3-3/4" in width, with an excellent operating temperature range from -40º to +176º Fahrenheit.
• ABYC Compliance Capable: Can help builders and aftermarket customers comply with ABYC standard H-22.8.7.2 for bilge pump outlet hoses.

Compatibility & Pairings:

Ideal for use in marine toilet systems, engine cooling systems, bilge pump outlets, gen-sets, air conditioners, and ballast tanks. Marelon plumbing fittings utilize NPSM parallel threads, compatible with marine-grade sealants and easily fitted with bronze fittings.