Moeller 033306-10 Brass Shut-Off Valve, 1/4 in. NPT x 3/8 in. Barb

The Moeller 033306-10 is a forged brass ball valve built to shut off fuel flow between a permanent fuel tank and a single outboard or inboard motor. The valve has a 1/4 inch NPT male inlet thread on one end and a 3/8 inch hose barb outlet on the other, letting it thread directly into a fitting on one side while a fuel hose clamps onto the barb on the other. Turning the ball handle a quarter turn shuts off fuel flow completely, which is useful for maintenance, winterizing, or isolating a fuel line without disconnecting hose sections.

The body and fittings are forged brass, chosen for corrosion resistance and durability in a marine fuel environment. The valve meets ABYC H-24 requirements, the marine industry standard covering gasoline fuel systems, so it is suitable for use in boat fuel line installations that need to comply with that standard. It is compact at 5.1 x 1.8 x 1.5 inches and weighs 0.13 pounds, making it easy to fit into tight spaces along a fuel line run near the tank or motor. This valve is intended for fuel line use only and is not to be used in potable water systems.

Specifications

• Brand: Moeller
• Manufacturer Part Number: 033306-10
• Material: Brass
• Valve Type: Ball Valve
• Inlet Connection: 1/4 inch NPT (National Pipe Tapered), male
• Outlet Connection: 3/8 inch hose barb
• Number of Ports: 1
• Item Dimensions: 5.1 x 1.8 x 1.5 inches
• Weight: 0.13 pounds
• Specification Met: ABYC H-24 requirements
• UPC: 739729011423

Fitment

This valve is a universal fuel line fitting intended to connect a permanent fuel tank to a single motor; it is not restricted to a specific make, model, or engine.

Replaces (OEM)

No OEM cross-reference numbers are listed for this part.

Frequently Asked Questions

What is the Moeller 033306-10 valve used for? The 033306-10 is a brass shut-off valve that connects a permanent fuel tank to a single motor and lets you close off fuel flow for maintenance or storage.

What size connections does this valve have? It has a 1/4 inch NPT male thread on the inlet side and a 3/8 inch hose barb on the outlet side, so it threads into a fitting on one end and takes a clamped hose on the other.

Can this valve be used in a drinking water system? No, the Moeller 033306-10 is designed for fuel systems and is not to be used in potable water systems.

What material is the 033306-10 shut-off valve made from? It is made of forged brass, chosen for its corrosion resistance in marine fuel line applications.

How much does the 033306-10 weigh? This valve weighs 0.13 pounds.

What are the dimensions of this valve? The 033306-10 measures 5.1 x 1.8 x 1.5 inches.

Does this valve meet any marine industry standards? Yes, the 033306-10 meets ABYC H-24 requirements, the marine standard covering gasoline fuel systems.

How is the 033306-10 installed on a fuel line? The 1/4 inch NPT male end threads into a fitting on the tank or line side, and a fuel hose is clamped onto the 3/8 inch barb on the outlet side; turning the ball handle opens or shuts off fuel flow.

Can one 033306-10 valve serve more than one motor? This valve is designed to connect a permanent tank to a single motor, not multiple motors.

Is this a ball valve or a check valve? The 033306-10 is a manual ball valve, operated by turning the handle to open or close fuel flow, rather than a one-way check valve.

What part number should I use to reorder this valve? Reorder using Moeller part number 033306-10.