That's an excellent and very practical question! The short answer is yes, you absolutely can power wash most urban trash cans, but doing it *safely* and *without damaging them* requires a bit of know-how. It's not just about blasting away with maximum pressure.
First, you need to identify the material. Most public bins are made from durable plastic (like HDPE), powder-coated steel, or sometimes stainless steel. High-pressure water is generally safe for these, but the technique varies. For plastic bins, using too high a pressure or holding the nozzle too close can cause surface etching, cracks, or even peel off painted labels. Powder-coated steel is tough but can chip if hit at the wrong angle.
The key is to use a wide-angle nozzle (like a 25 or 40-degree tip) and keep the pressure washer setting on a medium to low setting—think around 1,200 to 1,800 PSI. Start from a distance of about 2-3 feet and move closer only if needed, using a sweeping motion. Never use a zero-degree rotary tip, as it's like a laser beam and will definitely cut into the material.
Pre-rinsing to remove loose debris and using a mild detergent can reduce the required pressure. Always aim the stream at an angle, not directly perpendicular, to minimize stress on the surface. After washing, a final rinse with clean water is best.
So, while power washing is a fantastic, efficient way to deep-clean urban bins, the goal is to use the *minimum effective pressure*. It’s about cleaning them, not stripping or breaking them. A careful approach ensures the bins are sanitized and look great, extending their service life in our busy cities.