Pressure washer
A pressure washer is the machine that delivers water at high pressure to rinse a car and to power a foam cannon.
What it means
A pressure washer is an electric or petrol-driven pump that takes ordinary tap water and delivers it through a lance at far higher pressure than a garden hose. In car care it does two jobs. First, it rinses: a strong, focused stream of water flushes loose dirt, road grime, and soap off the paint, wheels, and underbody without a cloth touching the surface, which means less mechanical contact and fewer swirl marks. Second, it powers the foam cannon, the attachment that mixes shampoo with air to lay a thick pre-wash foam onto the car. Pressure washers are rated by water pressure and flow rate, and for car work moderate pressure with good flow is preferred, since very aggressive pressure held close to the panel can chip stone-damaged paint or force water past worn seals. A fan-spray nozzle, held at a sensible distance, gives a safe and effective rinse. It is a workhorse of any proper wash bay and the engine behind the touchless first stages of a wash.
Why it matters in Singapore
Singapore's frequent heavy rain throws up a constant layer of road film, sand, and grit onto a car. A pressure washer flushes the bulk of that loose contamination off before any contact wash begins, which is the single biggest step in keeping swirl marks out of the paint. It also drives the foam cannon that does the gentle pre-wash work in this climate.
How Revol Carz handles this
Revol Carz uses a pressure washer through the early stages of every wash, to flush loose grime off the car and to power the foam-cannon pre-wash before any mitt touches the paint.