Why is my pressure washer not pulling the detergent in the injectors the model is a jet usa 7 ohp 3800psi .I am droping the fillter end into chemicals but it does not pull it into the pump ???

SOURCE: Ryobi 3000 psi pressure washer detergent injector

Most detergent injectors work by the venturi system. That is that the detergent is drawn into the stream by the forward flow of the water thru a very narrow port after the water passes thru the pump. This system works best when the pressure at the tip of the wand is low. Trying using a very large tip to draw in and apply the detergent, then remove injector and rinse with high pressure. Not good for the pump but to apply soap reliably under high pressure the soap needs to be injected through the intake of the pump. enjoy

Bill Linda Rivard

• 197 Answers
• Posted on May 22, 2010

SOURCE: john deere 3800psi pressure washer will not siphon

The only way the washer will draw soap into the line is with either the black tip installed or with no tip in wand at all.There is a ball and spring inside of the pipe that the siphon hose hooks to so when you use the washer with alot or even a little pressure the ball is forced up and blockes off the soap inlet port.So if you use it with no tip in the inlet port is open cause the ball isnt being forced up by back pressure.I hope this makes sense.

SOURCE: wont pull detergent

problem is that u have to use with lowest pressure i believe black tip

SOURCE: I recently purchased a northstar 4000 psi pressure

The injector might be worn out or have something inside of the valve causing it not to ****. If you are using a new high pressure hose or a longer hose this may also have an effect over the injector not working.