The Forespar MF 843 Vented Loop is designed to prevent fluid siphoning between tanks, commonly utilized in marine toilet and engine cooling systems. It features a simple valve mechanism at the top that allows air into the line when the system is inactive and seals securely during fluid flow. Constructed from Marelon, this unit is built to resist corrosion.
- Barb Size: 5/8 in. (15.87 mm)
- Height: 4-1/2 in. (114.3 mm)
- Width: 4 in. (101.6 mm)
- Material: Marelon
- Includes a duckbill one-way valve designed to maintain a seal even when particulate matter is present
- Manufacturer Part Number: 903003
Product facts
- CT SKU
- CT-106948
- Model / MPN
- 903003
- UPC / GTIN
- 028026148742
- Package dimensions
- 2" X 5" X 5"
- Package weight
- 0.15 lb
- Specifications
- Type = Vented Loops
Shipping & returns
Shipping & returns
Shipping methods, delivery estimates, and final costs appear at checkout before payment. Some bulky, supplier-shipped, or special-handling items may ship separately. See Shipping & Returns for return windows and eligibility.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
