That's an excellent and very practical question! The short answer is: it depends entirely on the specific bin's material and construction. Let's break it down.
Generally, high-quality, commercial-grade outdoor trash bins made from materials like polyethylene plastic, stainless steel, or powder-coated metal are designed to withstand pressure washing. They are built for harsh environments, and routine cleaning with a pressure washer is a common maintenance practice for municipalities and facilities management. The key is using a wide-angle, low-pressure tip and keeping the nozzle at a safe distance (usually 12-18 inches) to avoid damaging the surface or forcing water into seams.
However, lightweight, residential-grade plastic bins or those with thin walls, existing cracks, or rust spots may be damaged. High-pressure water can crack brittle plastic, peel paint or powder coatings, and worsen corrosion. It can also force water into pivot points or lid mechanisms, leading to rust or mildew.
Best Practices for Pressure Washing Trash Bins:
1. Check Manufacturer Guidelines: Always consult the bin's manual or specifications first.
2. Use the Right Settings: Opt for a medium to low pressure setting (around 1200-2000 PSI) with a 25- or 40-degree nozzle.
3. Pre-rinse and Use Mild Detergent: Remove loose debris and use a biodegradable cleaner to break down grime.
4. Mind the Angles: Spray at a downward angle to avoid driving water underneath lids or into hardware.
5. Inspect Regularly: Look for cracks, rust, or weakened areas that the pressure washer could exploit.
In summary, while robust outdoor bins are built for this cleaning method, always err on the side of caution. A test spray on a small, inconspicuous area can save you from costly replacements. For less durable bins, a good scrub with a long-handled brush and hose is often the safer choice.