Using this spray arm cap is a breeze. First, make sure your dishwasher is turned off and unplugged for safety. Locate the bottom spray arm in your Simpson Riviera or early Silencio dishwasher. Unscrew the old cap if there is one and then simply screw on this new white 50mm diameter cap. It should fit snugly. As for maintenance, it's a good idea to check the cap periodically for any signs of wear or blockages. If you notice any debris, you can gently clean it with warm soapy water and a soft brush. Keep in mind that this is a genuine part, so it's built to last, but if you have any issues, our guarantee has you covered. And remember, always refer to your dishwasher's user manual for any specific instructions related to your model.