ATTENTION: Working pressure is 1000 to 3200 PSI. Flow rate is from 2 GPM to 5 GPM. The presure which is higher than 3200 PSI will not work. Power washer chemical injector kit includes chemical injector, 10 Feet tubing, filter and black soap nozzle.Application: Must Follow Manual to Set Up Chemical Injector. It is used to siphon detergent out of separate container. The chemical runs after pump. So it allows for a wider choice of chemicals.Chemical injector has standard 3/8’’ quick connect fitting. It connects pressure washer pump to hose.Dilution ratio of chemical vs water can been adjusted by controlling metering valve.Works with most brands of gas and electric pressure washer. Suitable for cold and hot water pressure washer.