Using this water connection adaptor is easy. First, identify the standard 1/2' BSP hose fitting in your kitchen or laundry, usually on the undersink tap. Then, connect the adaptor to this fitting. Next, take your 5/16' plastic water hose and simply push it into the outlet hole of the adaptor until it locks and seals. That's it! When it comes to maintenance, make sure to check the connection regularly for any signs of leaks. If you notice any water dripping, try tightening the adaptor on the BSP fitting. Also, keep the adaptor clean by wiping it down with a damp cloth every few months. Avoid using harsh chemicals as they might damage the plastic parts. And always store the adaptor in a dry place when not in use to prevent rust or corrosion.