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      01-02-2025, 01:52 PM   #43
nyalpine90
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Quote:
Originally Posted by powerplaymike View Post
Holding other variables constant, psi is determined by the tip orifice size.

As such, pretty much any pressure washer you see is going to have a “marketed” psi and/or gpm to attract your attention, but in reality the variable is the tip they supply because they’re basically all using the same or similar OEM mfr’d pump, either across brands or within their own brand.

The smaller the tip hole, the more PSI but at less GPM.
The larger the hole, the less the PSI but with more GPM.
(To a degree, as there’s limitations to the pump and also electrical circuit limitations)

So, whether it be a supposed 1800 psi Craftsman or a supposed 2000 psi Greenworks or a supposed 2600 psi Greenworks, I can almost guarantee the difference is the tip orifice size and you can put the appropriate tip on any one of them to achieve equal nominal 1000psi and 1.2-1.4gpm performance from any of them. (NOTE: this is applicable to standard style pumps…some units from the likes of Greenworks are brushless and use a special smart sensing variable brushless motor that can vary the output…..but they have a terrible lag like a turbo lag in a car, which some people don’t like)

Matt from Obsessed Garage did a huge test of all the different PW’s, and has a good chart that shows all of them with the performance.

At the end of the day, the big box stores are all selling what are more or less identical pieces but with different housings or colors and “marketed” psi or gpm that appeal to the happy home owner.

Main reason being the style of motors/pumps that all those big box stores are buying from the supplier are all the same lower end ones and also have to be compatable with only a 15amp circuit in the US market.

Euro market has pressure washers with better performance cause they have different household electrical system than the US does.
this is very helpful.
i guess upgrading the nozzle tips and water gun would be good idea?
Appreciate 0