Forespar MF 840 Vented Loop, 1-1/2" Marelon Corrosion-Resistant

Ensure fail-safe fluid management and eliminate unwanted siphoning within your marine systems with the Forespar MF 840 Vented Loop. Engineered from advanced Marelon composite, this essential component provides reliable protection for marine toilet and engine cooling systems. Its innovative valve design allows essential air intake when not in use, yet seals securely during operation, even with particulate matter present. Invest in Forespar's legacy of marine-grade durability and upgrade your vessel's plumbing for enhanced safety and longevity.

Key Benefits & Features:

• Marelon Construction: Molded from Forespar's proprietary Marelon composite, ensuring complete freedom from corrosion and electrolysis, and offering superior strength and lightweight performance in harsh marine environments.
• Anti-Siphoning Protection: Features a simple duckbill one-way valve system that effectively prevents siphoning of fluids between tanks, enhancing system integrity.
• Optimized Air Management: The integrated valve allows air to enter the line when not in use, preventing vacuum lock, and seals reliably as water or other fluid passes through.
• Generous Barb Size: Equipped with a 1-1/2" (38.1mm) barb size for secure, leak-proof connection to standard marine hoses.
• Compact Dimensions: Measures 5-1/4" (133.35mm) in height and 7-3/4" (196.85mm) in width, facilitating installation in diverse vessel layouts.

Compatibility & Pairings: This vented loop is commonly utilized in marine toilet systems and engine cooling applications. It pairs seamlessly with other Forespar Marelon plumbing components for a fully integrated, corrosion-resistant system, such as the Forespar MF 841 Vent Cap Assembly (Part #903002) for external venting options.