This genuine replacement chemical hose is designed to connect the chemical or soap reservoir to the pressure washer nzle using a plastic tube that connects to the reservoir and a flexible piece of tubing. This hose can become broken or clogged with regular use, which would require replacement. This OEM pressure washer hose is manufactured for use with select models of pressure washers from Briggs & Stratton and Toro. It is sold as an individual unit and does not include other accessories or hardware. The chemical hose is made of durable plastic and other materials. Although draining the chemical reservoir isn't necessary for replacement, it should be done with caution to avoid spillage. Always wear gloves when performing repairs on equipment like pressure washers. It may be a good idea to check the other hoses and connections in the pressure washer when replacing this part to take care of any other issues and ensure that all hoses are in good working order and wear evenly.