Liquid blasting system

A liquid blasting system for blasting liquid or a liquid-abrasive mixture onto an area to be blasted, the system comprising

• a housing having an interior,
• liquid inlet means disposed on and through the housing and communicating with the housing's interior for receiving liquid under pressure and transmitting it to the area to be blasted,
• a hollow catcher having an interior and comprising an involuted channel of spiral-shaped cross-section, the involuted channel having an opening in communication with the housing's interior and disposed to receive liquid and blasted materials from the area to be blasted, the catcher's interior having a protective liner for withstanding high pressures or abrasives, and wherein the catcher has one or more exit ports and liquid and blasted material flowing into the involuted channel passes through a circuitous path in the channel before exiting through the one or more exit ports, and
• one or more exit connections one each in communication with the one or more exit ports on the catcher for attaching vacuum means to and in communication with the catcher for sucking material out of the catcher, and
• one or more abrasive injection inlets disposed on the housing for injecting abrasives into the liquid flowing from the liquid inlet means.