How to Fix a Pressure Washer Soap Injector

How to Fix a Pressure Washer Soap Injector

How Do You Fix a Chemical Injector on Pressure Washer?

Don't worry, we'll get your pressure washer siphoning detergent in no time. Pressure washers aren't too complicated, so there are just a few common things that could be causing the issue. Let me walk you through some easy troubleshooting steps.

Alright, let's get your pressure washer siphoning detergent again. There are just a few common things to check.

Open Soap Injector Switch

The simplest fix might be making sure the soap injector switch is turned on. I know it sounds obvious, but it's easy to forget!

turn-on-soap-injector

Adjust the water control knob to increase or decrease the amount of soap that is mixed into the water stream. More open means more soap.

Adjust Pressure Lower

If that's not it, check your pressure settings. Your manual should tell you the best settings for detergent injection. If the pressure is too high, no soap will come through. You may need to lower the inlet pressure while spraying to get the soap flowing. Follow the way to adjust the pressure on your pressure washer which is written right now. Or for some common pressure washers, you can adjust the pressure by unloader valve.

turn-on-soap-injector

Less than 1500 PSI (pounds per square inch) is best for most soap injectors. The lower the pressure, the better. Between 800-1200 PSI typically works well.

Choosing Incorrect Nozzle

Are you using a high-pressure nozzle? Switch to a low-pressure nozzle designed for detergent injection. High-pressure nozzles can block the soap from coming through. Use a wide fan tip nozzle. A 15-, 25-, or 40-degree nozzle will work well. Narrower nozzle angles will put too much pressure on the injector. So choosing a suitable nozzle is very important for soap injectors.

The reason is that back pressure from a high-pressure nozzle can push the detergent back up the line. So low-pressure nozzles help prevent that.

Clogged Nozzle

A clogged n.ozzle can also cause issues, so disconnect your spray wand and use a thin wire like a paperclip to clear any blockages. Then flush it out with water and reconnect. Clean the injector and lines regularly to ensure the valve and orifice remain clear. Even small debris can block the soap from flowing.

May you forget: Dilute your soap concentrate as needed according to the manufacturer's instructions. If your soap isn't available, you can refer to use Dawn to replace

Let's keep working through simple solutions first. Disconnect the high-pressure hose from the pump. If the detergent starts siphoning now, you know the problem is in one of the attached parts. Reconnect each part one at a time to figure out which one needs cleaning.

Most likely, you just have a bit of debris stuck in the injector valve or some corrosion. Take the injector apart, clean out any debris, and replace any damaged parts. WD-40 can help free up stuck parts before reassembling.

FAQs about Pressure Washer Not Siphoning Detergent

Q: How do I troubleshoot a soap injector that only occasionally works?

A: Intermittent issues are often caused by debris getting trapped in the valve. Over time, this can worsen and stop the valve from opening fully. Take the injector apart, clean it thoroughly, and replace any damaged parts like the valve diaphragm.

Q: My soap injector sprays detergent constantly. How do I fix it?

A: The valve is likely stuck open, the valve spring is broken, or the valve diaphragm is damaged. Replace the entire injector assembly if taking it apart reveals any of these issues. You may also need to thin your detergent if it has become too viscous.

Q: What parts do I need to replace my entire soap injector?

A: You'll need the injector valve assembly itself which includes the valve body, inlet nipple, diaphragm, and spring. You'll also need a new length of detergent inlet tubing to connect the new injector to your pressure washer pump.

Q: Can I use any pressure washer detergent with my soap injector?

A: No, only use soaps specifically formulated for use in an injector system. Regular detergents may be too thick or contain ingredients that can damage your pump over time.

 

About Author

Andrian Cheng is the founder of Wikipressurewasher.com, a comprehensive website dedicated to pressure washers. He also owns a highly reputable store that sells a variety of electronic machines, including several models of pressure washers.

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