Using soap or other cleaning chemicals can give your industrial pressure washer extra cleaning power, especially for tough, greasy messes. However, it’s not uncommon for the chemical injector on commercial power washing equipment to stop working properly. Fortunately, isolating the problem is a fairly simple matter, and usually easy to fix. Here’s a look at the possible causes of chemical injector failure and how to address them:
Wrong nozzle tip. If your industrial pressure washer has interchangeable tips, make sure the soap tip is installed, as most soap injectors will not work with high-pressure nozzles. (Likewise, if your pressure washer has an adjustable nozzle, make sure it is in the low-pressure position to ensure that it is drawing soap.)
Valve is turned off. Next, make sure the soap injector valve is turned on and positioned at the desired setting.
Hose is not submerged. If the injector hose is not submerged properly, it can’t draw up the fluid. Check that the hose is submerged, and test your power washing equipment again.
Debris is lodged in the injector. If the previous steps haven’t solved the problem with your industrial pressure washer, you may need to disassemble and clean the injector. Debris may be caught in the injector valve, injector ball valve or orifice.
If you’re having difficulty adjusting the chemical injector of your power washing equipment, check your pressure washer to see if you can adjust the injection rate by turning the valve. On some models, you can increase the chemical injection rate by turning the valve counterclockwise, whereas turning the valve clockwise will allow you to decrease the injection rate. The most common chemical injection-to-water ratios fall between 12:1 and 18:1. Check the manual for your industrial pressure washer to determine the proper ratio for your needs.
It is also important to note that, in general, low-pressure detergent works better than high-pressure detergent. Low-pressure detergent can penetrate a surface and can be spread evenly with minimal splash back. High-pressure detergent tends to blow off during the application process.
And, last but certainly not least, never use anything but pressure washer-safe cleaning solutions in your power washing equipment. The use of other chemicals such as bleach will damage seals and o-rings in the gun, wand, hoses and pumps of your pressure washer.