WATER CLEANER

PROBLEM TO BE SOLVED: To fit a drain valve surely under an addition opening. SOLUTION: In a water cleaner having a filter medium container, an inflow pipe connected to the container, a water discharge pipe from the container, water receiving trays which communicate with the water discharge pipe and are fitted to a housing including the container and the bottom part of the housing, a water discharge opening located above the housing, an opening part such as the addition opening which is in the housing and adds additives such as calcium from the outside of the housing, and the drain valve which discharges water in a water passage communicating with the water discharge opening outside the passage, a drain valve holding tool is installed so that the drain valve is located below the addition opening.