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under car pressure washer Frequently Asked Questions: Question: Can it be connected to the water supply directly? Answer: This nozzle needs to be connected to a power washer. It has a 1/4-inch male plug, easy to connect and release to the pressure washer. Question: Is there a suggested water pressure or PSI? Answer: The nozzle works from 1500 PSI to 4000 PSI. It is recommended to use at 2500 PSI or higher to get the best performance of the spray nozzle. Question: What's the difference between Undercarriage and Road Cleaner? Answer: Undercarriage cleaner has a nozzle that faces and sprays water upward and is mainly used and effective in cleaning underneath your vehicle. The Road Cleaner has a nozzle that faces and sprays water downward and is effective in cleaning and removing mud and grimes on the road, pathway, or driveway. WARMQ undercarriage pressure washer water broom can do both.







