If Your Machine Is Rated More than 2.9 GPM

This Residential drain cleaner will overload pressure washers that are even slightly over 2.9 GPM.

Overloading will result in constant cycling of the pressure washer unloader valve, and close to zero cleaning and pulling force.

If your pressure washer is rated more than 2.9 GPM, choose a Commercial Gas drain cleaner that's designed to work with larger machines.