⛽ Keep your engine primed and pressure steady — never miss a start again!
The EVIL ENERGY 3/8" Fuel Check Valve is a premium inline non-return valve made from durable 6061-T6 aluminum alloy with a corrosion-resistant black anodized finish. Engineered to maintain stable fuel pressure with a stainless steel spring, it supports a wide pressure range (0.2–6 bar) and extreme temperatures (-22℉ to 266℉). Ideal for carbureted and low-pressure fuel systems using diesel, gasoline, and other fluids, it offers easy installation and reliable performance that prevents fuel backflow and ensures instant startups.
| Brand | EVIL ENERGY |
| Exterior Finish | Stainless Steel |
| Inlet Connection Size | 0.38 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Material | Aluminum |
| Outlet Connection Type | National Pipe Tapered |
J**L
Game-Changer for Cold Starts – Must-Have for Older Rigs!
I installed the Evil Energy 3/8" inline fuel check valve along with their 300 PSI 3/8" fuel hose on my 1998 Jeep Grand Cherokee (5.2L) — and let me tell you, the difference was night and day. My Jeep already had a new fuel pump and strong pressure readings, but the pressure would drop quickly after shutdown, making cold starts a chore. After adding the check valve into the line, the fuel pressure now holds steady, and startups are instant — no more pumping the throttle or long cranks. It genuinely saved my carbureted-style motor’s life. The valve came as a pair, easy to install, and the directional arrow makes orientation simple. The hose is tough, cleanly built, and rated at 300 PSI, so you know it’s not cheap junk. Whether you're fighting bleed-off issues or just want to protect your fuel system, this is a cheap, high-quality fix. Can’t recommend it enough!
B**S
Very well made and works perfectly!
A diesel mechanic recommended that I install a check valve in the fuel line near the fuel tank to solve the problem of my boat engine stalling 20-30 seconds after starting. This problem had plagued me for months and a I had fruitlessly spent a lot of money try to 'fix' the problem. It turned out that this very inexpensive check valve solved the issue! Yea! I am VERY happy!! It was super simple to install it in the fuel line near the tank. It is really well made and I now have a spare because I only needed one of them.
D**Y
Money saved just as good as any other
Works great
C**N
A
A really good product...
G**T
Works as advertised.
Used it for my pcv system upgrade and it 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.
J**C
Work Great!
Love these things! They do exactly what they’re supposed to do and are made of high quality aluminum.
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
1 month ago
2 months ago
