Using this vacuum cleaner hose is easy. First, make sure your vacuum cleaner is turned off and unplugged. Then, find the old hose on your Volta Pulsar Power U4503, U4505, U5005, U5006, U5007, or U5008 model. Press the two opposing push - to - release clips on the machine end of the old hose and remove it. Next, take your new hose and insert the machine end, which has a 39.5mm diameter, into the corresponding opening on the vacuum cleaner. Make sure it fits snugly. Then, connect the bent end with a 33.7mm diameter into the standard 35mm pipe. As for maintenance, regularly check the hose for any blockages. If there's dirt or debris inside, you can use a long, thin object like a wire hanger to gently remove it. Also, keep the hose away from sharp objects to prevent punctures. When not in use, store it in a cool, dry place. And always remember to turn off and unplug your vacuum cleaner before making any hose - related changes.