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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🔥 Keep your fuel flow flawless, no backflow allowed! ⚙️

WIDE TEMPERATURE RANGE - Reliable operation from freezing cold to scorching heat
HIGH PRESSURE RESILIENCE - Withstands up to 6 bar to keep your fuel system flawless
BACKFLOW PREVENTION MASTERY - Ensures smooth starts and protects your engine by stopping reverse flow
UNIVERSAL FLUID COMPATIBILITY - Perfect for petrol, diesel, oil, air, and more—versatility that fuels your projects
PRECISION ENGINEERED ALUMINUM ALLOY - Lightweight yet ultra-durable for long-lasting performance

The Evil Energy 10mm 3/8'' Fuel Line One Way Non Return Check Valve is a robust, aluminum alloy valve designed for carburetors and low-pressure fuel systems. Certified to multiple industry standards, it operates reliably between -22℉ and 266℉, supports pressures up to 6 bar, and prevents fuel backflow to ensure smooth engine starts. Compatible with petrol, diesel, oil, air, and other fluids, this pack of two valves is a must-have upgrade for any serious tuning enthusiast.

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Manufacturer	Speedwow Tuning
Part Number	EV01342S10BK
Package Dimensions	11.99 x 10.59 x 2.79 cm; 41 g
Item model number	EV01342S10BK
Size	3/8
Colour	Black
Material	Aluminium, Plastic
Item Package Quantity	1
Number of Pieces	2
Maximum Pressure	6 Bars
Certification	ANSI B1.20.1, ANSI B16.11, ASME B16.34, ASTM, CSA, EPA, ISO 9001, ULC
Batteries included?	No
Batteries Required?	No
Item Weight	41 g

Evil Energy 10mm 3/8'' Fuel Line One Way Non Return Check Valve Oil Petrol Diesel Aluminium Alloy Black Pack of 2

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