This thing helped me quickly figure out that it wasnt my HPOP that was bad. like I originally thought. In the end it ended up being a bad IPR pigtail. This saved my $800 buying a replacement HPOP. Thanks guys!

Clays service to his customers is spot on

Now this tool is what the doctor ordered! I was struggling to determine hpo and this EASILY & QUICKLY ruled out my pump as the culprit!! Nice work Riffraff!!! Definitely recommending!

Worked great

Havint used it yet. But I know it will work. Solid metal plug no doubt it will work. Will also fit some heui international engins and CAT heui engins. I did verify the fitment on a maxforce 10 pump we have at the shop.

Works as advertised. Well made. Was able to dead head hpop. Advise using a length of hydraulic hose to hook up gauge as a pressure cushion because the pressure comes up very quickly. Without the hose my 3000 psi gauge was immediately pegged. This could damage a positive displacement pump without a pressure relief valve.

Easy tool to use, great American made product.

This is a great tool and has saved me time and not money. I thought my adrenaline pump had failed and was going to send it back for warranty but couldn't really have the truck offline. Saw this tool, and figured I would give it a try. Used it and the truck fired right up, so now I know it isn't a bad pump. Still digging but now at least I know I am not waisting time swapping out an HPOP for no reason. Recommended for a fast answer on if your pump is bad.

This makes testing the HPOP so much easier. I have needed one of these in the shop for years!