There are many jobs that require less pressure than your machine is rated. The absolute BEST way to accomplish this reduction of pressure is to use a dual-lance wand (also called a chemical injection wand). This wand has a valve built-in that, when opened, allows water to be diverted to the second tube (or lance). With the chemical injector tip on that second tube (black in color) the water going through that tip has little or no pressure behind it. The more you open the valve, the lower the overall pressure delivered by the wand is. With this set-up, you can use low pressure for the deck and/or roof and run full pressure to clean the driveway afterwards – without carrying a second wand or additional tips.
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