pressure washing business guide

How To Use a Down Stream Injector For Soft Washing

How To Use a Down Stream Injector:

Down stream injectors are very simple tools to use. There are jsut a few tips you need to keep in mind to ensure that your injector works smoothly. I will share a few videos on this page that will explain in detail.

  • The video is about downstream injectors, which are used to mix soap and water in a pressure washer.
  • Jason uses a general pump high draw injector, which costs about $20. He recommends using quick connects with the injector so that it can be easily replaced if it breaks.
  • The injector works by using a venturi effect to draw soap into the water stream. The higher the pressure, the more soap is drawn in.
  • Jason  says that the injector can last for about 6-8 weeks, but he has had better luck with quick connects.
  • He also mentions that the injector can be damaged if the hose gets pinched or a hole develops in it.
  • Jason compares downstream injectors to X-jets, which are more expensive but last longer. He says that downstream injectors are a good option for cleaning vinyl siding, while X-jets are better for cleaning stucco and brick.
  • He concludes the video by saying that he hopes the information was helpful and encourages viewers to check out his other videos or visit pressurewashingtraining.com for more information.

Here are some additional points that were mentioned in the video:

  • The injector only works in one direction, so the flow of water must be in the correct direction.
  • The injector can be tested by putting your finger on the end of the hose. If the injector is working properly, you should feel a suction.
  • The injector can be cleaned by removing the ball valve and soaking it in a mild detergent solution.


In this video, Marco from WashMart.com shows how to install a downstream injector on a pressure washer. He explains that a downstream injector is used to add chemicals or truck wash soaps to the water after the pump, at a lower pressure. This is useful for applications where high pressure is not needed, such as cleaning patios or driveways.

Marco starts by showing how to identify the direction of flow on the downstream injector. He then connects the injector to the pressure hose and turns on the water. He explains that the higher the pressure, the harder it is for the injector to siphon the chemical. This is why it is important to use a low pressure nozzle when using a downstream injector.

Marco then demonstrates how to downstream without turning on the power washer. He simply attaches the injector to the pressure hose and turns on the water from the house. The chemical will be drawn into the stream of water and can be used to clean surfaces.

Marco concludes the video by noting that downstreaming is a useful technique for pressure washing. It can be used to clean surfaces without damaging them, and it can also be used to save water.

Here are some additional points that are mentioned in the video:

  • The downstream injector should be installed in the inlet line, after the pump.
  • The injector should be oriented in the direction of water flow.
  • The chemical reservoir should be filled with the desired chemical.
  • The low pressure nozzle should be attached to the pressure washer wand.
  • The power washer should be turned on and the chemical will be drawn into the stream of water.


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