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 compared to a traditional stack replacement is that tenants don’t need to move out of their apartments during the renovation. The final result provides a safe, secure, and economical 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.