PW101-2010 (Reaffirmed 2016): Standard for Testing and Rating Performance of Pressure Washers: Determination of Pressure and Water Flow

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In October 1998, PWMA approved its first standard, PWMA PW101-1998, “Standard for Testing and Rating Performance of Pressure Washers: Determination of Pressure and Water Flow.”

In August 2010, PWMA approved an update to its PW101-1998 standard, requiring electric motor units to perform at a minimum of 90 percent of the washer’s rated psi (pounds per square inch) and gpm (gallons per minute).

PWMA PW101 provides a uniform method of testing and rating the pressure and water flow of pressure washers, the product’s two primary performance characteristics. The standard applies to pressure washers intended for the household, farm, consumer, or commercial/industrial markets.

The pressure washers covered by PWMA PW101 are portable, engine or electric motor driven, in which the discharge line is hand supported and manipulated.

“This new standard means that consumers can have greater confidence in the advertised performance ratings of pressure washers,” says John Addington, PWMA executive director. “We fully expect the major retailers to require compliance to this new standard for the 2012 buying season.”

In development for several years, the revised standard applies to pressure washers manufactured after Sept. 30, 2011.

PWMA PW201-2014: Dimensional Standard for 1/4" Quick Connect Coupler Plugs and Sockets for Portable Pressure Washers

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The purpose of this standard is to provide uniform dimensions method for 1/4" Quick Connect Coupler Plugs for Portable Pressure Washers. 1/4" Quick Connect (QC) couplers are used to join or separate quickly fluid conducting lines, without the use of tools or special devices, typically related to the pressure washer spray nozzle.

PWMA PW202-2014: Dimensional Standard for 3/8" Quick Connect Coupler Plugs and Sockets for Portable Pressure Washers

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The purpose of this standard is to provide uniform dimensions method for 3/8" Quick Connect Coupler Plugs for Portable Pressure Washers. 3/8" Quick Connect (QC) Couplers are used to join or separate quickly fluid conducting lines, without the use of tools or special devices, typically related to pressure washer hose, gun and pump connections.

PWMA PW203-2014: Dimensional Standard for M22 Thread Connect Coupler Receptacles and Plug Collars for Portable Pressure Washers

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The purpose of this standard is to provide uniform dimensions method for M22 Thread Connect Coupler Receptacles for Portable Pressure Washers. M22 couplers are used to join or separate quickly fluid conducting lines, without the use of tools or special devices,typically related to the pressure washer hoses, pumps, spray guns and wands.

PWMA PW301-2012: Marking Standard for Spray Nozzles Used With Portable Pressure Washers

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The purpose of this standard is to provide a Marking method for Spray Nozzles used with Pressure washers to help indicate Pressure/Flow Rating as well as Spray Angle. Spray Nozzles are used to dispense water at various pressure and flows as well as at various spray angles.