Using your Brizo Invari Sensori Volume Control Trim is super easy. Just use the lever handle to adjust the water volume according to your needs. For the best performance, make sure the water pressure is between 45 - 80 psi. When installing, remember to order the rough separately. It's designed to fit wall thicknesses from 2 1/8' to 2 3/4', and if you have a thicker wall up to 3 1/4', you can use the RP100304 extension. As for maintenance, regularly wipe the trim with a soft, dry cloth to keep it looking new. Avoid using harsh chemicals or abrasive cleaners as they can damage the solid brass construction. With proper care, your volume control trim will serve you well for a long time.