after market check valve...

[livinlots26]

My dad has a Chevy dura junk that we put a home made fass/airdog fuel system on with a 3400 gallon hrs pump and 2 filters(I know it's small but it's stock and it's what he wanted lol) so anyway while I was down there I put in a in line 3/8 inch check valve which seems to work awesome case his truck only turns over maybe 3 Times and fires up so I was thinking about putting the same one on my 07 6.0 psd now I know It has a cheap plastIc one In the fIlter housIng but I dont thInk It Is doIng Its job. My issue is I'm not sure which line on the electric fuel pump is the supply line I want to put it just after the frame mounted fuel pump. Does anyone know which is the supply... top or bottom on the pump. Also any thoughts to doing this would be cool too.

[jesilvas]

I don't see the need. With the key on, the HFCM starts running and building fuel pressure.

[livinlots26]

Peace of mind I guess haha. I just like knowing the fuel can't bleed back

[livinlots26]

Any one know which line is the supply one

[livinlots26]

Still looking for some info...

[Njstroker91]

On the hfcm there are arrows one facing the engine one facing the tank. My 06 was marked.


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[Heath_R]

My 05 was marked with arrows as well. Top was the return bottom was the supply. Supply was marked with green stickers on both side of the pump.

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[averageguy]

I see no point or need for a check valve. It seams like it would be just something in a system that could fail and cause issues.

[livinlots26]

I understand there is already an extremely cheap plastic check valve in the engine mounted filter housing and yes once the pump comes on it will pressurize the system but let's just say the filter one fails or you would like to do away with the valve itself and just have the stem into the filter then you would want something inline to hold the fuel from bleeding back plus your pump shouldn't have to run as long before the lines are pressurized. I don't see where an issue would arise seeing the check valve is 3/8s line and all brass with rubber seal that was made for putting in big trucks. All 6 of my big rigs have one very similar and over hundreds of thousands of miles the check valve has never let failed. My plastic ford one was sticking open and had to replace it. I would like to do away with it cause the brass one is way easier to open and in my mind seals better. Weather this is true or not it's something for me to do on a weekend to unborn myself lol. But thanks for the info on the lines guys I will get to it and let you all know if there is anus improvements.

[livinlots26]

I ment ANY IMPROVEMENTS NOT ANUS MAO