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Reviewed in the United States on January 22, 2025
Just a rubber flap inside. Air can go both ways.
amborg
Reviewed in the United States on June 8, 2022
I needed a one-way check valve in my cars' fuel injection supply line, to maintain pressure in the lines after the engine is shut off (therefore the fuel pump stops running). This is to make restarts easier. This check valve does what I was looking for. The pressure does bleed down after some time though, I wish it would keep the pressure longer. Hence the 4-star rating.
Charles R Wheatley
Reviewed in the United States on August 6, 2021
As discribed.
Levi
Reviewed in the United States on August 15, 2021
My fuel pump didn't have a check valve. This works for me, it holds about 30psi for 30-45mins after the pump shuts off. I don't have to crank my car over several times for it to start.
Robert Payne
Reviewed in the United States on August 12, 2019
In front of the fuel filter on the fuel line to the fuel pressure regulator on my EFI engine in my 56 Ford. Works great!!
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