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Always Free Shipping—No Minimum Order Contiguous U.S. orders only. Alaska and Hawaii excluded.
Returns & Refunds
Eligible items may be returned within 30 days of delivery. Items must be new, unused, uninstalled, and in original packaging. An RMA is required.
Installment options at checkout are provided by Shop Pay and its partners and are subject to eligibility. Options depend on your purchase amount and may require a credit check by the financing partner. Terms, rates, and eligibility are determined by the financing partner. For details, see the Shop Pay Installments terms during checkout.
MF 845 Vented Loop - 1/2"
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: 1/2" (12.7mm)
Height: 5-1/4" (133.35mm)
Width: 4-1/4" (107.95mm)
The Forespar MF 845 Vented Loop is an essential component for marine and engine cooling systems, designed to prevent siphoning of fluids between tanks. Crafted from durable Marelon, this vented loop offers corrosion resistance and reliable performance in demanding environments. Its innovative valve system allows air to enter the line when not in use, effectively sealing off the fluid passage to prevent backflow while ensuring smooth fluid flow when needed. This feature makes it ideal for applications like marine toilet systems and engine cooling circuits where maintaining fluid integrity is critical. The built-in duckbill one-way valve is engineered to seal tightly even when particulate matter is present, ensuring long-term dependability. With a 1/2 inch barb size, the Forespar MF 845 is easy to install and compatible with standard fittings, making it a versatile choice for boat owners and technicians alike. Its compact dimensions make it suitable for tight spaces without sacrificing performance or durability. Whether you're replacing an old vented loop or installing a new system, this product provides peace of mind with its high-quality construction and proven design. Compliant with marine standards, the MF 845 helps ensure your systems operate safely and efficiently for years to come.
Features:
Corrosion-resistant Marelon construction for durability in marine environments
Vented design prevents siphoning between tanks
Integrated top-mounted valve allows air entry and fluid sealing
Duckbill one-way valve seals effectively even with particulate matter
Easy to install with 1/2 inch barb fitting suitable for standard marine tubing
It worked as is described and it got my uncle‘s fridge back up and running perfectly
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As discribed. Brand new in excellent shape, fast delivery, well made and an awesome price. Super job thanks a million!
The Trident Marin Extra Flex Corrugated Wet Exhaust hose works great. I had to replace the old hose coming from the generator muffler to the exhaust pipe going out the hull. The hose needed to be curved and the flex was perfect. Delivery was fast with no issues. Thank you
J
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I ordered my product August 30! I have yet to receive it! My shipping cost was over ten dollars ! I could of walked there and picked it up,it would have been faster!
No option for zero stars. I ordered a roll of 6 awg duplex wire and they drop shipped me a cheap, completely unrelated item. Nobody answers emails or the phone.
