Moeller 033807-10 Brass Anti-Siphon Valve, 3/8 Inch Barb x 1/4 NPT, 30 Calibration

The Moeller 033807-10 is a brass anti-siphon valve built for permanent marine fuel tank installations. It combines anti-siphon protection with a convenient hose barb design, fitting a 3/8 inch hose barb on one side and a 1/4 NPT threaded connection on the other. Federal law requires anti-siphon protection on permanent fuel tank installations whenever the fuel hose dips below the top of the tank, and this valve is designed to meet that requirement while keeping the fuel line connection simple to plumb.

This valve is rated at 30 Calibration, which yields 30 inches of vertical height protection, meaning it is engineered to hold back fuel siphoning up to that head height in the fuel line. The brass construction is built to stand up to continuous exposure to marine fuel and the onboard environment. Installation is straightforward: the 1/4 NPT end threads into the fuel tank fitting or fuel line assembly, while the 3/8 inch barb end accepts standard 3/8 inch fuel hose secured with a hose clamp.

The Moeller 033807-10 is sold as a single valve and is identified by its own model number, distinct from Moeller's other anti-siphon valve calibrations that use different barb and NPT thread combinations. Always confirm the barb size and NPT thread size needed for your fuel system before ordering, since anti-siphon valves are not interchangeable across sizes.

Specifications

• Brand: Moeller
• Manufacturer Part Number: 033807-10
• Hose Barb Size: 3/8 inch
• NPT Thread Size: 1/4 NPT
• Calibration: 30 Calibration (30 inches vertical height protection)
• Material: Brass
• Package Dimensions: 4.61 x 1.65 x 1.02 inches
• Weight: 0.1 pounds
• UPC: 739729011140

Frequently Asked Questions

What does the Moeller 033807-10 anti-siphon valve connect to? One end is a 3/8 inch hose barb for standard fuel hose, and the other end is a 1/4 NPT threaded connection, so the 033807-10 links a 3/8 inch fuel line to a 1/4 NPT fitting on the tank or fuel system.

Is an anti-siphon valve required on my boat's fuel tank? Federal law requires anti-siphon protection on permanent fuel tank installations if the fuel hose dips below the top of the tank, which is the situation the Moeller 033807-10 is designed to address.

What is the calibration rating of the 033807-10 valve? The 033807-10 is rated at 30 Calibration, which yields 30 inches of vertical height protection in the fuel line.

What material is the Moeller 033807-10 made from? This anti-siphon valve is made from brass.

How is the Moeller 033807-10 different from Moeller's other anti-siphon valves? Moeller offers anti-siphon valves in multiple barb and NPT thread combinations; the 033807-10 specifically uses a 3/8 inch barb with a 1/4 NPT thread and a 30 Calibration rating, while other part numbers in the line use different barb sizes, thread sizes, or calibration ratings.

What are the package dimensions of the 033807-10? The Moeller 033807-10 anti-siphon valve has package dimensions of 4.61 x 1.65 x 1.02 inches.

How much does the Moeller 033807-10 weigh? The 033807-10 weighs 0.1 pounds.

How do I install the Moeller 033807-10 anti-siphon valve? The 1/4 NPT end threads into the tank fitting or fuel line assembly, and 3/8 inch fuel hose is fitted over the barb end and secured with a hose clamp.

Does the Moeller 033807-10 combine anti-siphon protection with a hose barb design? Yes, the 033807-10 combines anti-siphon protection with a convenient hose barb design in a single valve.

What is the UPC for the Moeller 033807-10? The Moeller 033807-10 anti-siphon valve carries UPC 739729011140.