Abstract: Portable water jetting apparatus is disclosed comprising a longitudinally collapsible cart having wheels at one end and a handle at the other, a water jetter unit removably mounted on the cart adjacent the wheeled end thereof, and a jetter hose reel unit mounted on the cart adjacent the handle end thereof. Both the water jetter unit and hose reel unit are adapted to be quickly and selectively disconnected from the cart to facilitate use, transportation, and/or storage of the apparatus, and the hose reel unit is pivotally mounted on the cart for selective orientation of the reel axis relative to the cart and thus the direction of winding or unwinding of the jetter hose therefrom during use of the apparatus.