Smith Drains with Integral Trap or Backwater Valve are cast iron commercial floor drains incorporating built-in trapping or backflow prevention to reduce installation complexity and support wastewater control. This range includes versatile drain configurations for multiple construction types, with select models offering shallow profile designs for tight-space installations and select models accommodating multiple additional inlets. Select models feature integral backwater valve protection to prevent wastewater from re-entering the facility during storm surge events.