The current release of StormNET supports Neenah Foundry and FHWA storm drain inlets, as well as three recently added inlet types:
- Gutter Depth Capture Curve
- Gutter Flow Capture Curve
- Maximum Capture Curve
We have additional inlet data for about 15 other storm drain inlet manufacturers that we plan to add to the software. This will take some time to implement into the software.
Note that out of all the foundry manufacturers, Neenah Foundry has the largest selection of storm drain inlets, including round grates. I would think that you should be able to find a Neenah inlet that very closely matches the dimensions of your "yard inlet with a round grate". Note that Neenah have the models available on line at:
Home - Neenah Foundry Company
Find the equivalent Neenah inlet that most closely represents the inlet you need to model, and then select that Manufacturer Part Number within StormNET.