Forespar 903016 MF 844 Vented Loop 1 Inch Marine Anti-Siphon Valve

The Forespar MF 844 Vented Loop is a critical safety component for marine sanitation and engine cooling systems. This 1-inch anti-siphon device prevents unwanted fluid transfer between tanks by breaking the siphon effect that can occur in below-waterline plumbing installations.

Key Features:

• Prevents backflow and cross-contamination in marine plumbing systems
• Integrated duckbill one-way valve allows air entry when system is idle, seals automatically when fluid flows
• Constructed from Marelon composite material for superior corrosion resistance
• Valve designed to function properly even with particulate matter in fluids
• Ideal for marine heads, holding tank vent lines, and engine raw water cooling systems
• 1-inch barb fittings for secure hose connections

Specifications:

• Barb Size: 1 inch (25.4mm)
• Overall Height: 7 inches (177.8mm)
• Overall Width: 9 inches (228.6mm)
• Material: Marelon (glass-reinforced composite)

This vented loop provides reliable protection against water back-siphoning, making it an essential component for any marine vessel with below-waterline through-hull fittings. The non-corrosive Marelon construction ensures long service life in harsh marine environments.