This is the "stripping" power. High PSI is great for deep stains on concrete or stripping paint.

Pressure washers are heavy. Before you hit "buy," check the return policy. If the pump fails in week two, does the online retailer pay for return shipping? Shipping a 60-pound gas unit back can cost a fortune. Opting for a "Ship to Store" model or a retailer with a local physical presence can save you a massive headache if things go south. 5. Must-Have Accessories to "Add to Cart"

Buying a pressure washer online is a classic modern dilemma: you’re caught between the convenience of home delivery and the anxiety of not being able to "kick the tires" on a machine that’s supposed to blast years of grime off your driveway. 1. The Power Specs: PSI vs. GPM

Many 1-star reviews are from people who received a unit damaged in shipping or a rare factory lemon. Look for patterns in the 3 and 4-star reviews instead—those users usually provide the most balanced pros and cons.

A rotating tip that offers the power of a 0-degree nozzle with the coverage of a 25-degree fan.

This is the "rinsing" power. High GPM determines how fast you actually finish the job.