power washer undercarriage
1. PSI and GPM Ratings Look for models with a PSI (pounds per square inch) rating between 1200-2000 for safe and effective car washing. A higher PSI might be too aggressive and could damage the paint. The GPM (gallons per minute) indicates how much water the unit can deliver; a higher GPM leads to better cleaning efficiency.
home car pressure washer

2. Water Conservation Surprisingly, using a car spray washer can be more water-efficient than traditional washing methods. A pressure washer typically uses less water to achieve a thorough clean. Many models are designed to provide powerful cleaning with minimal water usage, making them an eco-friendly option.
Another factor to consider is the material of the hose. Most pressure washer hoses are made from either rubber or PVC. Rubber hoses are more durable and can withstand higher temperatures, making them ideal for heavy-duty cleaning. On the other hand, PVC hoses are lighter and more flexible, which makes them easier to handle but may not be suitable for extreme conditions.
Using the caliper or micrometer, measure the inner diameter of the brake drum. If the drum displays a lip or ridge from wear, ensure your measurement captures the least-worn area. A typical brake drum has a specified maximum permissible diameter, which can be found in the vehicle’s service manual. This measurement is critical; if the drum exceeds its maximum diameter due to wear, it may need to be replaced.
how to measure a drum brake
