Which of the following types of water jetting operates at the highest pressure?

Ultrahigh-pressure water jetting operates at the highest pressure among the given options. This method utilizes water at extremely high pressures, typically exceeding 20,000 psi (pounds per square inch), and can reach up to 40,000 psi or more. Such pressures enable the effective removal of tough contaminants, coatings, and even the preparation of surfaces for painting or other coatings by creating a clean surface profile.

This technique is particularly useful in industrial applications where thorough cleaning is necessary, as it can also minimize the need for chemicals and mechanical scrubbing. While high-pressure water jetting is effective, it generally operates at lower pressures than ultrahigh-pressure water jetting. Low-pressure water cleaning is suitable for light cleaning tasks and does not have the same impact as the ultrahigh-pressure variant. Abrasive media cleaning involves the use of particles propelled by water but does not primarily rely on pressure alone like ultrahigh-pressure water jetting does.