Cleaning β FAQ
Will a gas pressure washer damage my wood deck?
Yes, if used improperly. Stay under 3500 PSI, keep the nozzle 12-18 inches from the surface, and use a 25-degree or wider fan. Never use a 0-degree nozzle. Test on a hidden board first and always move with the wood grain.
How long does it take to pressure wash a 300 sq ft deck?
With a 2.6 GPM unit like the WPX3400, expect 35-45 minutes including setup. A 4.0+ GPM commercial unit cuts that to 20-25 minutes. Add 15 minutes for applying soap and 10 minutes for moving furniture.
Should I use soap when pressure washing my deck?
Yes. Pre-treating with deck detergent loosens grime and reduces required pressure. Use the onboard soap tank and a 40-degree nozzle to apply, let dwell 5-10 minutes, then rinse with a 25-degree tip. This prevents over-pressurizing wood.
Is a surface cleaner attachment worth it for decks?
Absolutely. A 16.5-inch surface cleaner cuts cleaning time by 60% and eliminates streaking caused by wand overlap. It also maintains consistent distance from the deck surface, reducing damage risk. Essential for decks over 400 square feet.
Can I pressure wash composite decking?
Yes, composite handles higher PSI than wood. Use up to 4000 PSI with a wide fan nozzle. The texture traps dirt, so higher GPM helps flush debris from grooves. Avoid using heat settings and keep the nozzle moving to prevent surface etching.
How do I winterize my gas pressure washer?
Run fuel stabilizer through the engine, then flush the pump with antifreeze solution. Disconnect hoses and drain completely. Store in a dry area. For units with thermal relief valves, activate them to clear remaining water from the pump head.
