Seeing water spewing out of your pressure washer can be a distressing sight. But don't panic. This just means that a thermal relief valve has been installed on your pump to prevent over heating. The thermal relief valve is usually preset to discharge water when it reaches 145 degrees. Until you pull the trigger, your pressure washer is in by-pass mode. The water is trapped in a loop, which means fresh cool water cannot come in. The water in the loop takes on heat generated by the pump, which can cause damage to the pumps internal components. To prevent this, you'll need to pull the trigger about every minute, more or less. If you won't be using the pressure washer for a while, just turn it off.
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Need a little more scrubbing power? Want to increase your cleaning efficiency?
Ultimate Washer offers a variety of Rotary Nozzles from which you can choose. Your cleaning time can be cut in half with the addition of this nozzle. These nozzles rotate at high speeds to increase the intensity of the spray. They can remove rust, graffiti, and barnacles from the bottom of boats just to mention a few. They can be used on pressure washers with as little as 3000 PSI up to the super heavy duty pressure washers whose PSI reaches 5000 PSI. Find more info at http://www.ultimatewasher.com/pressure-washer-rotary-nozzles.htm