Forespar Performance Products MF 847 Vented Loop - 1-1/8" for Marine and Engine Cooling Systems

MF 847 Vented Loop - 1-1/8"

Installing one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple 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. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids.

Specifications:

• Barb Size: 1-1/8" (28.57mm)
• Height: 7" (177.8mm)
• Width: 9" (228.6mm)

Ensure reliable fluid management with the Forespar Performance Products MF 847 Vented Loop, designed for marine toilet and engine cooling systems. This vented loop features a durable molded Marelon body that resists corrosion, making it ideal for demanding marine environments. Its simple yet effective valve system allows air to enter the line when not in use, preventing siphoning and maintaining proper fluid levels in your tanks or cooling system. When fluids pass through, the valve seals securely, thanks to the duckbill one-way valve, which is designed to handle particulate matter without compromising performance. This design minimizes maintenance and prevents leaks, ensuring your system operates smoothly under various conditions. The MF 847 vented loop is engineered with a 1-1/8-inch barb size, making it compatible with standard marine hoses, and measures approximately 7 inches high and 9 inches wide for easy installation in tight spaces. Whether you're maintaining a boat’s plumbing system or engine cooling setup, this vented loop offers a reliable, corrosion-free solution that enhances system safety and efficiency. Trusted by marine professionals and boat owners alike, the MF 847 vented loop is essential for preventing siphoning and ensuring optimal fluid flow in your marine applications. (Prop 65 Warning: This product contains chemicals known to the State of California to cause cancer and reproductive toxicity.)

Features:

• Corrosion-resistant molded Marelon body for longevity in harsh environments

• Effective venting system prevents siphoning in marine systems

• Duckbill one-way valve seals properly even with particulate matter present

• Compatible with 1-1/8 inch hose barb fittings for easy installation

• Compact design measures approximately 7 inches in height and 9 inches in width

Manufacturer documents

• Forespar Marelon plumbing catalog — MF 847 / 903018 specifications and installation guidance
• Forespar current product page — 903018, replacing 903009