Easy to use. Compact and lockable. Safely and accurately dilutes chemical concentrates to create ready-to-use cleaning products. Delivers cleaning solutions directly into your containers, minimizing worker interaction with chemicals. Whether you're cleaning a hospital, classroom, office building or retail space, you know you're getting the correct amount of chemicals to do the job right. Air Gap, Pressure Relief Valve. Soap Dispensers Type: For Liquids; Interior Volume Capacity: (4) 0.5 gal bottles; Mounting: Wall; Material(s): Plastic.