AAA 90034 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4400 PSI, 4.0 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black

I installed this AAA 90034 triplex pump on my gas-powered pressure washer, and it completely transformed the machine. The 4400 PSI and 4.0 GPM output are no joke — it delivers excellent pressure and flow, perfect for heavy-duty cleaning tasks. Installation was straightforward, and it came with everything needed, including the siphon tube and hardware.It runs smooth and feels solidly built. After weeks of use, it’s still performing like new. Definitely worth the price if you’re looking to upgrade or replace a worn-out pump.

I own a DeWalt 4400 machine. The original pump lasted me 12 years of heavy use. This pump arrived Feb 9, 2025. I installed it within a week. But it’s winter in Nebraska so I didn’t start using it until April. At first, pressure was fine. I used it for maybe 30 minutes washing off my skid steer machine. Then I took it to a job site. Performance started to decrease within the first ten minutes. I blamed the water pressure. Went to the next job. Same thing. And again I blamed poor water pressure. It’s a new pump. Has to be something else. I didn’t get 2 hours out of this pump. And when you let off the handle and it goes to bypass mode it makes a horrendous noise. But of course, the return window is closed and you can’t talk to who sent the pump. I read the reviews before I purchased and chose to ignore the reviews that said this pump failed quickly. I’m telling you, believe the reviews like mine. This pump is total junk. If you do chose to buy, spend the money on the 3 year protection plan. You’ll need it. $300 education to buy local from someone you can talk to.

It’s not the same pump on the picture of description but it’s exactly like the original that came with dewalt 4400 psi pressure washer, it is perfect and comes with oil. My pressure is the same again.

Works great and the pressure etc is perfect for our pressure washer.

I only have a couple hours of use on it so far, but it seems to be working as advertised.... so far.After buying it I found a lot of people on various forums posting about the AAA brand being absolute junk and a waste of money. I'm sure hoping that's not the case. Only time will tell if the nay sayers were right or not. And I fear they will be as those nay sayers primarily consisted of people in the professional pressure washing community. Based on that alone, I would not have bought this pump had I heard their opinions beforehand. But also like I said, so far it has been working fine with zero issues. Fingers crossed.

I needed to replace the pump on my Simpson pressure washer and this fit perfectly and saved me from buying a pressure washer!

I ordered the 90034 pump for the 4400psi pressure washer in February anticipating spring coming up For spring cleaning. The box came and labeled 90034. Well, spring is here in late march and I open the box and peeled always the spray foam packaging and find out they switched it to a 90036 pump for a 3200 psi power washer. Jeez, thanks simpson! Nice bait and switch. Yes, now im outside the return window and I got ripped.

Fue muy bueno para el trabajo de mi esposo le encanto