I am sure it is covered on here hundreds of times, but what size fitting does it take to hook up a fuel pressure testing gauge to the test port on the fuel bowl? I don't plan on installing a full time gauge just yet, just something to use to check the health of my system.

 

It's #4 ORB(ORing Boss) most hook it up with an #4 ORB to 1/8" NPT if you have a hydraulic shop near you, they should have what you need, if not Clay has them

Riffraff Diesel: Pressure Port Adapter - Straight 1/8 FNPT

Riffraff Diesel: Pressure Port Adapter - 90 deg elbow x 1/8 FNPT

 

Awesome! Thanks. Maybe I will just go ahead and install a in-cab unit and be done with it. Those fittings will certainly make it easy enough.

 

It's the same as the plug on top of the hpop res. I don't remember where I got mine but it was local . Hardware store or the Depot or the Low store.

 

Just ordered the fittings and an isspro gauge for in the cab.
Thanks everybody

 

Good to hear, It's one of the best gauges to have in my opinion.