For a pressure washer, this snowmaker is designed to work best with pressure washers that have a GPM (Gallons per Minute) flow rating of 1.5 - 3.5 GPM. The washer needs to be at rated for at least 1000 PSI (Pounds per Square Inch) but the exact number doesn't matter too much. If you have a washer with less than 2.1 GPM, replace one of the 4002 nozzles with a plug when you build your snowmaker.
This is a pretty standard electic pressure washer that can crank out a good amount of snow. It lists for $179 but is often on sale. Some smaller pressure washers come with a one-piece hose/wand combo. If yours does, you'll need to buy a separate
pressure washer extension hose as well (about $25 at any hardware store or
Westinghouse 1.76 GPM Electric Pressure Washer
Not the most reliable engine, but a good flow rate and a good setup. Don't expect to engine to last forever, but you'll enjoy plenty of snowmaking with this machie.
Simpson 2.5 GPM Gas Powered Pressure Washer
This is an awesome pressure washer for snowmaking. Reliable Honda engine, good flow rate (2.5gpm), solid frame.
Simpson 3200 PSI 2.5 GPM Honda Engine Gas Pressure Washer