The interpump 201 and 202 flows 11 lpm so they will cavitate running from mains water if you have a big nozzle or tip...my 1000l bowser machine empties faster than it fills using a turbo nozzel
The Ws201 is 15 l/min at 200 bar and the Ws202 is 21 l/min at 200 bar.
A decent mains supply will just about feed a 201 but definitely not a 202.