Fast and safe drain stack replacement LK Wet Room Module is a prefabricated unit developed for fast and safe drain stack replacements in bathrooms. It contains drain stacks, drains, a flush cistern, and toilet for wall hung mounting. By choosing LK Wet Room Module, your work will be more efficient and you will save both time and money. One of the many advantages compering to a traditional stack replacement is that tenants doesn’t need to move out of their apartments during the renovation. The final result provides a safe, secure, and economic installation of a prefabricated system with a minimal extension from the wall. LK Wet Room Module offers a wide range of options and variations. There are also several additional options, such as preparing for water use meters etc.