Always Free Shipping—No Minimum Order · Contiguous U.S. orders only. Alaska and Hawaii excluded.
Shipping & Delivery
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 843 Vented Loop - 5/8"
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: 5/8" (15.87mm)
Height: 4-1/2" (114.3mm)
Width: 4" (101.6mm)
The Forespar Performance Products MF 843 Vented Loop is an essential component for marine and engine cooling systems, designed to prevent fluid siphoning between tanks or through lines. Constructed from durable Marelon, this vented loop offers excellent corrosion resistance, ensuring long-lasting performance in demanding environments. The integrated one-way duckbill valve effectively seals when not in use, allowing air to enter the line to prevent siphoning, while sealing tightly to prevent fluid backflow. Its simple yet reliable valve mechanism enhances system safety and efficiency, making it a vital part of marine plumbing and cooling applications. The compact design features a 5/8 inch barb size, with a height of approximately 4-1/2 inches and a width of 4 inches, making it suitable for various installation configurations. The vented loop's robust construction and reliable sealing capabilities help maintain optimal system pressure and prevent leaks, reducing maintenance needs and ensuring smooth operation of your marine or engine systems. Manufactured by Forespar Performance Products, this vented loop complies with marine standards and is Prop 65 compliant, ensuring safety and environmental responsibility. Easy to install and maintain, the MF 843 vented loop is an excellent choice for boat owners and technicians seeking durability, performance, and peace of mind in their fluid management systems.
Features:
Vented loop prevents siphoning of fluids between tanks or lines
Constructed from corrosion-resistant Marelon material
Integrated duckbill one-way valve seals properly against particulate matter
Simple valve system allows air entry when not in use and seals when fluid passes through
Compact design with 5/8 inch barb size, suitable for various installation setups
Durable construction ideal for marine and engine cooling systems
Prop 65 compliant, ensuring safety and environmental standards
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
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware James Cline
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.
It worked as is described and it got my uncle‘s fridge back up and running perfectly
Norcold Gas Control
Dennis Johnsen
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
Trident Marine 2" Extra-Flex Corrugated Marine Wet Exhaust Hose - Sold by the Foot
James Cline
Very pleased with that product
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware
Gerald
As discribed. Brand new in excellent shape, fast delivery, well made and an awesome price. Super job thanks a million!