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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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3/8" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black(10mm OD,2PCS)

3/8" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black(10mm OD,2PCS)

Product ID: 646918863

Details

Material
Aluminum
Brand
EVIL ENERGY
Exterior Finish
Stainless
Inlet Connection Size
0.38 Inches
Inlet Connection Type
National Pipe
Outlet Connection Type
National Pipe

🔥6 bar max working pressure

⚙️3/8 inch (10mm) precision fit

❄️-22℉ to 266℉ wide temp range

₩103373

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Description

🚀 Lock in your fuel flow, unlock peak performance!

PREMIUM BUILD QUALITY - Crafted from black anodized 6061-T6 aluminum alloy with stainless steel spring for corrosion resistance and long-lasting performance.
ALL WEATHER DURABILITY - Performs flawlessly from freezing -22℉ to scorching 266℉, perfect for any climate or engine heat.
EFFORTLESS INSTALLATION - Compact, lightweight design with barb inlet/outlet enables quick, no-fuss setup—get back on the road faster.
PRECISION ENGINEERED FIT - 3/8 inch (10mm) OD ensures seamless integration with your fuel system for hassle-free upgrades.
UNMATCHED PRESSURE RESILIENCE - Operates reliably up to 6 bar (87 psi), keeping your fuel flow steady under demanding conditions.

The EVIL ENERGY 3/8" Fuel Check Valve is a high-strength, black anodized aluminum inline valve designed to prevent fuel backflow in carburetor and low-pressure fuel systems. Featuring a stainless steel spring and a robust operating range from -22℉ to 266℉ and pressures up to 6 bar, it ensures reliable, corrosion-resistant performance. Ideal for diesel, gasoline, and multiple fluid types, this compact valve offers quick installation and stable system pressure, making it a must-have upgrade for millennial pros seeking dependable engine efficiency.

Specifications

ASIN	B08JJ1F79D
Best Sellers Rank	#287,298 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #12 in Automobile Check Valves
Brand	EVIL ENERGY
Brand Name	EVIL ENERGY
Connector Type	Barb
Country of Publication	USA
Customer Reviews	4.5 out of 5 stars 2,899 Reviews
Exterior Finish	Stainless Steel
Inlet Connection Size	0.38 Inches
Inlet Connection Type	National Pipe Tapered
Manufacturer	Speedwow Tuning
Manufacturer Part Number	EV01342S10BK
Material	Aluminum
Material Type	Aluminum
Maximum Pressure	6 Bars
Model Number	EV01342S10BK
Number of Pieces	2
Number of Ports	2
Outlet Connection Size	0.38 Inches
Outlet Connection Type	National Pipe Tapered
Size	3/8
Smart Home Compatibility	Not Smart Home Compatible
Specification Met	ANSI B1.20.1, ANSI B16.11, ASME B16.34, ASTM, CSA, EPA, ISO 9001, ULC
Thread Size	3/8 inch (10mm)
Thread Type	NPT
Unit Count	2.0 Count
Valve Type	Check Valve

Reviews

C**S

Quality and correctly sized

Nice construction, used for pond water feature rather than fuel so s tad over engineered for the purpose but I like that. Good fit well made.

20.01.2024

R**.

Pesimo

Pesima calidad, no es de la medida que describe (mas chica) y no soporta mas de 5 psi de presión, no lo puedo devolver porque ya lo use!

6.05.2026

M**D

Work will

Recommend

16.04.2024

Y**D

The Flow Rate not what you can expected

sure was made from good material , but the flow not what you can expected.

25.10.2022

C**Y

Valve unidirectionnel

C'est petite valve font très bien leur travail dans le circuit ou je les ai installer elles fonctionnent a la merveille

30.06.2026

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₩103373

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In stock

Sold byAmazon South KoreaDelivered 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 South Korea.

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