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⛽ Keep your fuel flowing forward — no backtracking, just pure power.
The EVIL ENERGY 1/2" Fuel Check Valve is a compact, high-strength inline non-return valve designed for diesel and gasoline systems. Featuring a 12mm outer diameter, it supports pressures from 0.2 to 6 bar and operates reliably across a wide temperature range (-22℉ to 266℉). Made from black anodized 6061-T6 aluminum with a stainless steel spring, it prevents fuel backflow, ensuring stable system pressure and protecting your engine. Ideal for carburetor and low-pressure fuel lines, this valve offers quick installation and durable performance for professional-grade fuel management.
| Brand | EVIL ENERGY |
| Exterior Finish | Stainless Steel |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Item dimensions L x W x H | 3.94 x 0.79 x 0.79 inches |
| Material | Aluminum |
E**P
Fingers crossed
I put one by the tank on my '72 CJ5. It held fuel for 24 hours but seemed to leak back after 48 hours. I just added the second one in the in the engine bay. I have an electric pump so running it with no fuel in the line would likely shorten its life span. The second will hopefully keep enough fuel by the pump to eliminate that risk. After adding the second valve in the engine bay my Jeep started with no problem after sitting for a few days and kept running without starving for fuel. It's got a 360 innit and just kept rumbling. Evil Energy offered my money back but since one wouldn't keep the line full, but for the price, having two valves in place I have no complaints whatsoever with this product. I highly recommend!
A**R
Great Value
Great product, works great
N**L
Quality Check Valves
They work well for letting fluid through. They dont flow at first, but if you put some fluid through and add a little pressure they will flow. Once they have fluid in them they continue to flow. I think they just need the initial lubricity then all good.
E**E
Tiny
It's little than seems, I will have to use for other applications and order a 3/8 instead.
W**M
Works.
Work great, got what I ordered.
M**R
WOW Nice
Wow, I thought they would be plastic, but they're not. They're metal and good quality.
M**R
Exactly what they should be.
As advertised.
G**M
Beware Alcohol based fuel
Works well for a bit, then fails. Apparently, our crappy alcohol mixture kills it. This one last one month.
Trustpilot
2 weeks ago
1 week ago