Prefabricated Bathroom Unit (PBU) Post author By CL Post date 14 May, 2020 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z The prefabricated bathroom unit (PBU) is constructed using dry installation method. The unit is pre-assembled in factory and delivered to site for installation. ← Not To Scale (NTS) → Professional Engineer (PE)