You should attach your Aqua Gleam De-ionising Water Filter to a standard hosepipe. Under no circumstances should you try to connect it to a pressure washer; you may damage it if you do. For best results and maximum life expectancy, we recommend wall mounting your filter (with Aqua Gleam Wall Mounting Clamps) and metering out the purified water into a large watering can (using a hose connector with a control valve fitted to the output end of the filter - these can be purchased at most garden centres). Doing this will help to avoid unnecessary wastage. The rinse procedure is best performed as follows. Firstly, rinse off the suds from the wash stage with ordinary tap water. Then turn off the tap, de-pressurise your hose and attach it to your filter. Next, open the control valve and turn the tap back on (this will allow the air in the filter to escape safely as flow commences). Once the watering can is full of purified water, turn off the control valve and begin rinsing your car, working from the top down. It typically takes fifty to sixty litres to rinse an average-sized car, so you will need to repeat this step several times. Once you've rinsed off the whole car, turn off the tap while refilling the watering can; this will de-pressurise the system safely. Once flow has ceased, disconnect your hose and pack everything away - you can now leave your car to dry naturally with no fear of water spots forming! Finally, note that the resin in your filter may degrade if it's exposed to a significant amount of sunlight, so if your filter is mounted in a sunny position cover it with a towel in between uses.