Williams Stone Company offers inlet stones for catch basins in a variety of configurations, shown in the table below.

Inlet Stone Options

All standard inlet stones are 7 inches deep by 6 feet in overall length, 15 inches To specify, select type, width and height. Contact Williams Stone for nonstandard configurations, including radius curves.

Type of Inlet Corners



Width of Inlet Opening

Single 24"

Double 48"

Height of Inlet Curb

Standard 16" +/- 1"

Low 12" +/- 1"

Standard Specifications

In addition to the standard inlets required by northeastern state DPWs, Williams Stone offers the following commonly requested city specifications, which are frequently in stock.

  • All Pittsfield MA inlet stones
  • All Worcester MA inlet stones
  • All Manchester CT inlet stones

Williams Stone Company can also produce inlet stones to meet any other state or municipal specifications.

Inlet Stone Finish & Joint Options

Williams Stone Company's inlet stones can be ordered with the same surface finishes and edge details as the curbing with which they will be installed, including:

  Surface finishes:                               Edge details:

  • Sawn top
  • Thermal top
  • Split face
  • Thermal face
  • Clean back
  • Bull nose
  • Chamfer
  • Buzzed

Standard 24" inlet stone, curved corners, Springfield MA

Standard 24" inlet stone, straight corners

Standard 48" inlet stone, straight corners

Curved 14" inlet stone, straight corners