To without difficulty clear a deck, a strain washer with a PSI vary of 2500 to 3000 is right

https://blast-wiki.win/index.php/Revitalize_Your_Outdoor_Space:_How_Often_Should_You_Pressure_Wash_Your_Patio_for_Maximum_Curb_Appeal%3F

To easily blank a deck, a tension washer with a PSI latitude of 2500 to 3000 is good. This tension point efficiently eliminates airborne dirt and dust, dust, and mildew devoid of damaging the timber