Install for maintenance inspection of traps and plumbing conflicts Square shape even in the corners of the wall for a clean installation. The frame size matches the width of the tile grout so it does not affect its aesthetics. The surface is chrome plated and can be used for building entrances, floors, public bathrooms and facilities. The connecting part is resin, so it can be glued to PVC pipes. (150 or less) Please use the special tool M127AW to open and close the cleaning opening. Note: There is a risk of deformation if excessive load is applied.