Many small pressure washers equipped with low pressure, downstream soap injection, or machines with variable injection, are not capable of precise chemical metering. Many injectors of this type can draw as much as 40 ounces per minute or more when fully opened, more than twice the typically necessary soap draw.
Unfortunately, there is really no easy way to restrict soap draw to the desired rate with these types of machines… until now. Hydro-Chem Systems manufacturers a device called a “soap saver” that restricts soap draw on machines with a variable injection rate to a preset maximum draw so no soap is wasted!