Description
Forespar 1-1/8" Vented Loop | Boat Supply Store
This Forespar MF 847 Vented Loop effectively prevents backflow and siphoning in critical marine fluid systems. Engineered with corrosion-proof Marelon, it features a robust 1-1/8" barb for secure hose connections and a 7" height profile. Its integrated duckbill valve maintains seal integrity, even with minor debris, ensuring reliable operation for marine toilet discharge lines or engine raw water intakes.
Key Features
- Prevents siphoning between tanks
- Suitable for marine toilet and engine cooling systems
- Allows air entry when not in use via simple valve system
- Effectively seals as fluid passes through
- Molded in Marelon for superior corrosion resistance
- Duckbill one-way valve seals properly even with particulate matter
- Ensures reliable anti-siphon protection for critical systems
- Durable construction designed for marine environments
Specifications
| Product Specifications | |
|---|---|
| Barb Size | 1-1/8" |
| Height | 7" |
| Width | 9" |
| Material | Marelon |
| Valve Type | Duckbill |
Who This Is For
Boat owners and marine technicians requiring dependable anti-siphon protection for onboard fluid transfer systems. Ideal for installations on vessels utilizing marine toilets or engine cooling systems where backflow prevention is paramount.
How It Compares
| Feature | Forespar 1-1/8" Vented Loop | Groco BV |
|---|---|---|
| Barb Size | 1-1/8" | 1 inch, 1 inch |
| Material | Marelon | Bronze, Nylon |
| Height | 7" | 6.5 inches, 6 inches |
| Width | 9" | — |
| Valve Type | Duckbill | Duckbill, Duckbill |
Common Concerns Answered
Will the duckbill valve get clogged easily?
The duckbill valve is designed to seal properly even with particulate matter. However, like any mechanical component in a marine environment, regular inspection and cleaning are recommended, especially if significant debris is anticipated in the system.
Is the 1-1/8" barb size standard for all applications?
The 1-1/8" barb is a common size for many marine applications. If your existing hose is a different diameter, adapters may be required to ensure a secure and leak-free connection.
Are there cheaper alternatives?
While less expensive plastic or bronze alternatives exist, the Forespar MF 847 Vented Loop's Marelon construction offers superior corrosion resistance and durability, providing long-term value and reliable performance in harsh marine conditions.
Frequently Asked Questions
What is a vented loop and why do I need one?
A vented loop is a device installed in a fluid line that allows air to enter the system, breaking a siphon and preventing unwanted fluid transfer. You need one to protect your vessel from flooding or damage caused by siphoning, particularly in marine toilet discharge or engine cooling systems.
Where are Forespar vented loops commonly used?
Forespar vented loops are commonly used in marine toilet systems to prevent holding tank discharge from siphoning back into the head, and in engine raw water intake or cooling systems to prevent water from siphoning into the engine when not in use.
What material is the Forespar MF 847 Vented Loop made from?
The Forespar MF 847 Vented Loop is constructed from Marelon, a highly durable and corrosion-resistant composite material specifically engineered for marine applications.
How does the duckbill valve in this vented loop work?
The duckbill valve is a one-way valve made of flexible material that opens to allow fluid flow in the desired direction. When flow stops, it naturally closes, preventing backflow. It is designed to seal effectively even in the presence of small debris.
What is the barb size of the Forespar MF 847 Vented Loop?
The Forespar MF 847 Vented Loop features a barb size of 1-1/8 inches, designed to accept standard marine hose of the corresponding diameter for secure connection.
