Difference between downstream injector and x-jet

  1. Downstream Injector: A downstream injector, also known as a chemical injector or soap injector, is a device that connects to the pressure washer’s pump. It is typically attached to the low-pressure side of the pump and draws chemicals or detergents into the water stream after the pump, downstream from the high-pressure pump output. The injector uses the pressure differential created by the water flow to draw and mix chemicals into the water stream. This allows for the application of cleaning agents, detergents, or other additives during pressure washing.
  2. X-Jet: An X-Jet (pronounced “ex-jet”) is a specialized type of downstream injector. It is a handheld, adjustable nozzle system that incorporates a chemical reservoir. Unlike a traditional downstream injector, the X-Jet does not connect directly to the pressure washer pump. Instead, it utilizes the pressure washer’s high-pressure spray to create a siphoning effect, drawing chemicals from the reservoir into the water stream. The X-Jet allows for on-the-fly adjustment of the chemical concentration by altering the nozzle’s position, enabling the user to apply different strengths of chemicals as needed.

Key Differences:

  1. Connection: A downstream injector connects to the pressure washer’s pump, while an X-Jet is a standalone nozzle system that does not directly attach to the pump.
  2. Chemical Mixing: With a downstream injector, the chemicals are mixed with the water downstream from the pump. In contrast, an X-Jet has a reservoir that allows for adjustable chemical mixing using the high-pressure spray.
  3. Portability: Downstream injectors are typically fixed in place and require a connection to the pressure washer. X-Jets are handheld and offer more mobility since they are not directly attached to the pressure washer.

In summary, a downstream injector is a separate device connected to the pressure washer’s pump, used for injecting chemicals into the water stream downstream from the pump. On the other hand, an X-Jet is a portable nozzle system with an integrated chemical reservoir, utilizing the high-pressure spray to draw and mix chemicals as needed.

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Yes, and?

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technicality They both do the same thing one is at the end by the noozle and the other is in line at the beginning on the line near to the pump saving you from carrying a mix around near the end of the hose. Both are injectors just do them at different places.

Ok thanks for the bad information

I think you need to edit your post.
Edit. I know you need to edit your post

I’m just going to stay out of this one!

This is a great idea of a thread topic to help new guys on the forum. However it needs to be edited for accuracy and pros and cons of each should be expanded upon, especially the part where the x-jet is rarely used since carrying around a pail of chems all day unnecessarily is something i’m glad i stopped doing after discovering the ds injector on this forum. Also batch mixing is eliminated with the ds injector.

So the x-jet can have a place but is very rarely needed. I did not need it once in the last 2 years.

It’s a lot more entertaining if you read it in the voice of David Attleboro. I’ve always wondered what would happen if you used an x jet as a ds injector or vice versa. There must be some inherent difference. I’ve also wondered if an injector with a 3/8 barb would pull a stronger mix, or even using a larger chemical tube with a 1/4 inch adapter at the injector. If it wouldn’t be conducive for better flow / less restriction, why are we running 1 inch hoses to a 1/2 inch pump inlet? Just thinking out loud.


If you research flow coeficient tables you’ll see 1/4" hose will flow well over a gallon a minute. There was no downstream injector on the market that could pull anywhere near that. The injector I’m manufacturing approaches 100 ounces a minute sizing up the chemical line would still be unnecessary. With that being said the high draw and the other specialty injector I’ll be producing will carry 3/8" barbs

So what you are saying is if i want to run more of my solution into the power washer stream then an x jet is the better option vs downstreaming? I imagined the down stream tube is fairly capped on flowrate whare as the x jet you can make a bit better in terms of flow rate?

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Yes sir, as it sits today

Until Dez invents a variable force fed injector. cough

I have a pump in mind but it will be expensive to manufacture in small quantities. Not quite convinced the market will bear it and I’ve got way too many fires cooking so there’s that as unfortunate as it is.