It bumps up my average city water pressure to roughly 400-500 psi. It definitely doesn't come close to a 1600+ psi pressure washer. For light duty cleaning of side walks and siding, it does work OK. It doesn't generate enough pressure to reliably remove mildew without chemicals. I normally use a pressure washer to wash the cars, but this water jet is much easier to use. The fan style nozzle works well for cars or watering plants. It is built from good quality materials, and the large valve handle is easy to use. The two nozzles are too light to be solid copper or brass, probably plated or painted aluminum.
This product does not repair a hose satisfactorily. After installing it and taking it off and reinstalling it several times, it continually leaked and squirted water everywhere. My son, my husband, and my neighbor (a plumber) all tried with no success. Looked on Melnor's Web site to see if there were instructions, thinking maybe I was doing something incorrectly, however there Iwere no instructions for this particular model. Save your money! I rated this product with one star because this site won't let you give ZERO!!