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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1/4" 6mm Non Return One Way Check Valve for Fuel Line Oil Petrol Diesel Aluminium Silver Pack of 2

1/4" 6mm Non Return One Way Check Valve for Fuel Line Oil Petrol Diesel Aluminium Silver Pack of 2

Product ID: 404144260

Details

Material
Aluminium
Brand
EVIL ENERGY
Exterior Finish
Silver
Inlet Connection Size
0.25 Inches
Inlet Connection Type
Flange
Outlet Connection Type
NPT

🔥6 bar max working pressure

⚙️6mm (1/4") precision fit

❄️-22℉ to 266℉ wide temp range

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Description

⛽ Keep your fuel flow flawless — no backflow, no compromises!

ALL WEATHER DURABILITY - Performs flawlessly from freezing -22℉ to scorching 266℉, perfect for any climate.
ONE WAY FLOW ASSURANCE - Stainless steel spring mechanism prevents fuel backflow, optimizing engine start-up and performance.
PREMIUM ALUMINUM BUILD - Crafted from high-strength 6061-T6 aluminum with black anodized finish for superior corrosion resistance.
PRECISION ENGINEERED FIT - Seamlessly integrates with standard 1/4" fuel lines for hassle-free installation.
ROBUST PRESSURE HANDLING - Operates reliably up to 6 bar (87 psi) ensuring stable fuel flow under demanding conditions.

The EVIL ENERGY 1/4" (6mm) Non Return Check Valve is a high-performance fuel system component designed to prevent backflow and maintain stable pressure. Made from durable 6061-T6 aluminum with a corrosion-resistant anodized finish, it supports pressures up to 6 bar and operates across a wide temperature range (-22℉ to 266℉). Ideal for carburetor and low-pressure fuel systems, this compact valve ensures reliable, efficient fuel delivery for petrol, diesel, oil, and more.

Specifications

ASIN	B085G7JVSM
Best Sellers Rank	#194,104 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #48,761 in Car Parts
Brand	EVIL ENERGY
Brand Name	EVIL ENERGY
Country of Publication	USA
Customer Reviews	4.5 out of 5 stars 2,831 Reviews
Exterior Finish	Silver
Inlet Connection Size	0.25 Inches
Inlet Connection Type	Flange
Item Type Name	check valve
Manufacturer	Speedwow Tuning
Manufacturer Part Number	EV01342S6SRCA1
Material	Aluminium
Material Type	Aluminium
Maximum Pressure	6 Bars
Model Number	EVFS01272S6BK
Number of Pieces	2
Number of Ports	2
Outlet Connection Size	0.25 Inches
Outlet Connection Type	NPT
Size	1/4
Specification Met	CE
Thread Size	1/4 inch
Thread Type	NPT
Unit Count	2 Count
Valve Type	Fuel 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

G**D

As expected

Works perfect

13.04.2026

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In stock

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

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