Using this Bobrick B - 3091 unit is easy. First, make sure to install it against the side wall of the toilet compartment with enough space for the grab bar above. You can refill the toilet tissue on the left - hand side whenever it runs out. For the toilet seat - cover dispenser, simply open it and load up to 500 paper covers. When the waste disposal reaches its 0.4 - gallon capacity, remove it for servicing. As for maintenance, wipe the satin - finish stainless steel surface regularly with a soft cloth to keep it looking good. Ensure the lock is functioning properly for security. Always refer to the installation manual for correct rough wall opening measurements during installation.