PWMA has developed material to help educate consumers to properly select the pressure washer that is right for them and guidelines on how to properly maintain a pressure washer.
PWMA PW101: Standard for Testing and Rating Performance of Pressure Washers: Determination of Pressure & Water Flow. Download PDF
PWMA PW201-2014: Dimensional Standard for 1/4" Quick Connect Coupler Plugs and Sockets for Portable Pressure Washers. Download PDF
PWMA PW202-2014: Dimensional Standard for 3/8" Quick Connect Coupler Plugs and Sockets for Portable Pressure Washers. Download PDF
PWMA PW203-2014: Dimensional Standard for M22 Thread Connect Coupler Receptacles and Plug Collars for Portable Pressure Washers. Download PDF
PWMA PW301-2012: Marking Standard for Spray Nozzles Used With Portable Pressure Washers.
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