Need Help: Initial equipment setup

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I JUST bought my first new machine. It may be peanuts to you guys, but I'm just going to test the waters here. I bought an Easy Kleen EZO2703G, gas powered diesel fired 3.0 GPM @ 2700 PSI. In the owners manual it states that the water inlet must maintain 20-60 psi pressure. I was hoping to do the odd mobile wash with this machine and planned to run off of a water tank. What would you suggest I do to attain that constant pressure on a mobile scale?

I was thinking about purchasing one of these and running it off of a bank of batteries:

3.0 GPM automatic freshwater pump
https://www.amazon.ca/dp/B00EDQ3GQM?psc=1

If the batteries won't cut it I could run my small generator, but the more I think about it the more it starts sounding like a PIA. Would appreciate suggestions.
 
Um don't take this the wrong way, but your pressure washer is just too small. First though the pressure washer is a direct drive pump which wants a pressure feed for water which you have figured out. If you got a gear box or belt driven you could run the unit off a tank which is what you want. Next, but also also important the pressure washer is really too small to do much. Most cold water pressure washers run 13hp for a small cold pressure washer, 15 hp is needed for a hot small pressure washer. 6.5 hp running at full speed won't give you max output no matter what they say. You will lucky to get 2000 psi with the heat running at 3 gpm, which is not going to get you too far when cleaning things. I don't know what you are chasing for work, but this pressure washer is made to clean the odd engine bay for a mechanics shop or small jobs in which you have lots of time to clean.

Your idea will work for your machine, but you will quickly learn the machine is just too small. Again I don't know what you are chasing for work but a 4-5 gpm cold water machine will dance circles around this machine. Just about anything you need heat for you also need some volume for as well.
 
Anthony,
From what I am guessing, now this is only a guess, you are looking to clean engines and equipment instead of buildings and cement. If that's the case, then this machine should be fine for you. You don't want water going all over the place and you will be working in tight areas where you don't want too much water, especially hot water, splashing back on you.
But if you are planning on doing any type of building work or flatwork with it, you might as well purchase another one and run them together to even have a chance at cleaning anything.

I think the booster pump theory should work for you as long as the output on the booster pump is greater than the output on the pressure washer. Are you going to be using this in a mobile application where you have no water source? Because with something with this small of a volume, I am sure you can find a water source that would not have a problem keeping up with you.

Without fully understanding exactly what you are trying to do (what are you cleaning, where are you cleaning it, etc.) then most of our answers will be guesses.
 
This machine is basically to clean and maintain my trucks/equipment. I wasn't asking for judgement in what I purchased, just suggestions on how you guys would make it work. I had a second hand Alkota 320X4 (3 GPM @ 2000 PSI) for a couple years and loved it. After I blew the thermal fuse on the burner motor it was parked (I never got all the scale out of the coil from the previous owner).

I really don't like the idea of running the inlet pump from a tank but so be it if I have to.
 
I think your best bet is to run the pressure washer directly off a spigot with a hundred plus feet of inlet hose. Adding booster pumps can cause problems, and if the booster fails then you burn up your washer as well. You will also need a way to run the booster, so that means either batteries or generator. If you have to run it off a tank, i would elevate the tank and use the weight of the water to force feed the pump. Water level in the tank is important going this route and must always have enough water(weight) to be able to get a consistent flow with no air pockets.
 
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