Would this valve be effective in a air/vapor system?

yes, the valve can works in air system

Can this be used on a submersible 600gph water pump for the basement?

This is a small check valve used for something like allowing a vacuum to be pulled in a single direction. It would not be appropriate for use with a fluid pump unless it is simply being used as part of a venting system to remove air from the pump prior to use.

Do you install before fuel pump or close to carburetor

Hi, it depends on your application, it usually installs close to the tank but you can put it closer to the fuel pump if you want. in any event it goes before the fuel pump as your trying to stop flow back.

Will this fit to Mazda Protege 2.0? Reference: 8574-20-309

This check valve will fit any 1/4 or 6mm fuel line.

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EVIL ENERGY 1/2" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS)

EVIL ENERGY 1/2" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS)

Product ID: 438305425

Details

Brand
EVIL ENERGY
Exterior Finish
Stainless
Inlet Connection Size
0.5 inches
Inlet Connection Type
National Pipe
Item dimensions L x W x H
3.94 x 0.79 x
Material
Aluminum

🔄One-way stainless steel spring prevents fuel backflow

🔥Works flawlessly from -22℉ to 266℉

⚙️6061-T6 aluminum alloy for ultimate durability

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Description

🔧 Keep your fuel flow flawless — no backflow, no downtime!

TRUSTED BY THOUSANDS - Ranked #1 in Automotive Replacement Exhaust Check Valves with 4.5-star rating from over 3,000 users.
EFFORTLESS INSTALLATION - Compact, lightweight design with barb inlet/outlet ensures quick, hassle-free setup.
VERSATILE COMPATIBILITY - Perfect for carburetors and low-pressure fuel systems using diesel, gasoline, petrol, water, oil, and air.
PRECISION PRESSURE CONTROL - Operates seamlessly within 0.2–6 bar (2.9–87 psi) to maintain stable fuel system pressure.
BUILT TO LAST ENGINEERED TO PERFORM - Premium black anodized 6061-T6 aluminum resists corrosion and wear for long-term reliability.

The EVIL ENERGY 1/2" Fuel Check Valve is a high-performance, black anodized aluminum inline valve designed for reliable one-way fuel flow in diesel and gasoline systems. Featuring a stainless steel spring and operating across a wide temperature and pressure range, it ensures stable system pressure and prevents backflow. Compact and easy to install, this valve is a top-rated choice for professional-grade automotive and fuel system applications.

Specifications

ASIN	B09TT4BVB5
Best Sellers Rank	#2,103 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Exhaust Check Valves
Brand Name	EVIL ENERGY
Connector Type	Barb
Customer Reviews	4.5 4.5 out of 5 stars (3,139)
Exterior Finish	Stainless Steel
Inlet Connection Size	0.5 inches
Inlet Connection Type	National Pipe Tapered
Item Dimensions	3.94 x 0.79 x 0.79 inches
Manufacturer	EVIL ENERGY
Manufacturer Part Number	EV01342S12BK
Material Type	Aluminum
Maximum Pressure	6 bar
Model Number	EV01342S12BK
Number of Pieces	2
Number of Ports	2
Outlet Connection Size	0.5 inches
Outlet Connection Type	National Pipe Tapered
Set Name	2
Size	1/2
Specification Met	ASME, ANSI, API
Thread Size	1/2 inch
Thread Type	NPT
Unit Count	2 Count
Valve Type	Check Valve

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€ 30.29

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to GERMANY.

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