How the selector reaches its result
The rules prioritize surface safety and commercial workflow. Concrete routes typically benefit from higher flow and a matched surface cleaner. Fleet and vehicle work requires controlled pressure and paint-safe distance. Grease-heavy routes can justify hot water when the surface and site permit it. Daily work increases the importance of a serviceable pump, hose system and parts support.
What the result cannot verify
Measure source flow, inspect the surface and confirm exact product instructions. Local wastewater requirements, electrical service, fuel storage and transport payload can change the answer.