Injector will be set to run at 100:1 unless specified otherwise, this can be changed by simply changing metering tip inside injector barb.
If using a hot water machine, scale build up from your coil can plug injector or foam head. On start up always run with injector in rinse mode for about 30-60 seconds to flush out any build up.
If a jumper hose is needed to go from your power washer to ST-160 injector please see our selection of hoses in accessories.