Forespar 903002 MF 841 Vent Cap Assembly for Marine Vented Loops

The Forespar MF 841 Vent Cap Assembly is a critical component for marine vented loop systems, preventing unwanted siphoning between tanks in marine plumbing applications. This assembly is commonly installed in marine toilet systems and engine cooling systems where backflow prevention is essential.

Key Features:

• One-way valve system automatically allows air to enter the line when not in use, yet seals effectively when water or fluid passes through
• Constructed from Marelon, a corrosion-resistant marine composite material that withstands harsh saltwater environments
• Duckbill valve design maintains proper seal even when particulate matter is present in fluids
• Prevents fluid from siphoning between tanks, protecting against accidental flooding or system contamination
• Direct replacement vent cap for Forespar vented loop systems

The MF 841 Vent Cap Assembly provides reliable, maintenance-free operation in marine plumbing systems. The durable Marelon construction eliminates corrosion concerns associated with metal fittings, while the intelligent valve design ensures consistent performance in real-world marine conditions.