About ten years ago I made my own deck washer, similar to the Empire unit. It consists of a 30" piece of 1" PVC waterline capped on one end. The other end has a garden hose adapter on it. I clamped it to a 1" by 4" board with galvanized pipe clamps. Then I drilled 1/64" holes every 4", splaying them at a 45 degree angle from one hole to the next, starting at the top center. I use it after damp mowings and does an effective job of getting the grass off from under the deck. Be assured that I'm NOT putting down the Empire unit, but I think that the one I made is effective for me anyway. I made it with stuff I had laying around the shop. Just saving a buck or two, you know!