Pressure Washing wands come in different lengths and have different purposes. There are benefits to both smaller and larger wands. For instance, the smaller wand can be used for breezeways, small alleyways, tight spots, and for surface areas that are absent of dirt and loose material. For longer length wands, you'll be able to use these for hard to reach spots, for ceilings of parking garages, and for anything where there is a chance to get dirty. The longer the wand, the less dirty you should get. Another benefit for the longer wand is when trying to push waste water towards one direction. This is because you can do a sweeping motion with the wand and cover more surface area from right to left and left to right. The longer wands are more beneficial for when using hot water as well because you'll reduce the chances of getting oversprayed.