Forespar MF 842 Vented Loop with 3/4 IN barbs, molded in glass-reinforced Marelon. Vented Loops are commonly used in marine toilet, bilge, and engine cooling systems. The simple inverted duckbill valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Neither vent nor loop will corrode. The duckbill one-way valve is designed to seal properly, even if particulate matter is present in fluids.

• Barb Size: 3/4 IN
• Height: 4-1/2 IN
• Width: 3-3/4 IN
• Model: MF 842
• Material: Glass-reinforced Marelon
• Color: Black