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" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Silver (6mm OD,2PCS)

Product ID: 191872719

Details

Brand
EVIL ENERGY
Exterior Finish
Silver Steel
Inlet Connection Size
0.25 Inches
Inlet Connection Type
National Pipe
Manufacturer
Speedwow
Material
Aluminum

🔥0.2–6 bar working pressure range

⚙️6061-T6 aluminum alloy build

🌡️-22℉ to 266℉ operating temperature

$37.31

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your ride with precision — never let fuel flow backwards again!

ALL WEATHER RELIABILITY - Performs consistently in extreme temperatures from -22℉ to 266℉, perfect for any climate or condition.
EFFORTLESS INSTALLATION - Compact, lightweight design with barb inlet/outlet enables quick, hassle-free setup in carburetor and fuel lines.
UNIDIRECTIONAL FLOW CONTROL - Stainless steel spring ensures flawless one-way fuel flow, eliminating backflow and stabilizing pressure.
WIDE PRESSURE COMPATIBILITY - Operates seamlessly between 0.2 and 6 bar (2.9–87 psi) to fit diverse low-pressure fuel systems.
PRECISION ENGINEERED DURABILITY - Crafted from high-strength 6061-T6 aluminum with black anodized finish for ultimate corrosion resistance.

The EVIL ENERGY 1/4" Fuel Check Valve is a premium inline non-return valve made from durable 6061-T6 aluminum alloy with a corrosion-resistant anodized finish. Designed for low-pressure fuel systems, it features a stainless steel spring for reliable one-way flow, supports pressures from 0.2 to 6 bar, and operates efficiently across a wide temperature range (-22℉ to 266℉). Ideal for diesel, gasoline, and multiple fluid types, this compact valve ensures stable fuel delivery and easy installation, making it a top choice for automotive professionals and enthusiasts alike.

Specifications

ASIN	B085G7JVSM
Best Sellers Rank	#1,858 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Exhaust Check Valves
Brand	EVIL ENERGY
Brand Name	EVIL ENERGY
Customer Reviews	4.5 out of 5 stars 3,130 Reviews
Exterior Finish	Silver , Stainless Steel
Inlet Connection Size	0.25 Inches
Inlet Connection Type	National Pipe Tapered
Manufacturer	Speedwow Tuning
Manufacturer Part Number	EV01342S6SRCA1
Material	Aluminum
Material Type	Aluminum
Maximum Pressure	87.02 Pound per Square Inch
Model Number	EVFS01272S6BK
Number of Pieces	2
Number of Ports	2
Outlet Connection Size	0.25 Inches
Outlet Connection Type	NPT
Size	1/4
Thread Size	1/4 inch
Thread Type	NPT
Unit Count	2 Count
Valve Type	Fuel Check Valve

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