PQY 1/2" 12mm Non Return One Way Fuel Check Valve Aluminium Alloy Petrol Diesel

Worked so well, I ordered another one! 5 Stars!!!

Felt very cheap but still using it six months later

I used this as a replacement for a brake booster check valve. Holds vacuum when motor is not running perfectly fine.

Low flow,

I wouldn't put this thing within 20 feet of a fuel line. I bought this as a check valve for a modified PCV system I'm setting up for one of my modified cars but it won't even work for that. The valving mechanism is cheap, poorly constructed, and doesn't flow any volume whatsoever. this only functions as a check valve from the perspective that it really doesn't allow flow in either direction. I unscrewed the two halves when I discovered the blockage bench testing it and it looks like the little cage collapsed down. Even if I were to 'fix' it to allow the disc to come off of the seat this thing is nothing but a huge flow restriction in its intended flow path. Nevermind the fact there is NO WAY any of these materials would hold up to regular fuel, let alone ethanol.

The part woks great with no problems. It is exactly what was described.

I used this on the gas overflow tube on a carb of a trx300fw. Works good. Let’s gas out and keeps water from getting in.

Check valve leaked as soon as I installed it. Had to replace undersized sealing o-ring with a larger one. Now it doesn't leak and still functions properly. If it came with proper sized o-ring from the start it would be a 5 star product.