Determining your Grate Size

how to measure for drainage grates

Determining what replacement grate you need can be a challenging prospect. There are many different manufacturers of trench drain and catch basin grates and each one makes their grates to fit their own drainage channel or basin. A 6 inch grate from one manufacturer will probably not fit a 6 inch channel from another manufacturer.

Measuring trench width
Measuring trench width

Commercial / Industrial Grates

For a single grate or a channel run, send us the exact measurements of the grate you are replacing (length x width x thickness) and the material type.  If there are any markings or lettering on the grate, please note it.  A photo is always nice for us to quickly identify the grate.


For a trench system grate replacement quote, we’ll need:

  • Exact width of the trench or channel
  • Shoulder height
  • Channel width
  • Length of the channel run
  • What will be driving over the grates
  • Zip Code of where grates will be shipped

Please email your info to
or call us at 610-638-1221.


Residential Grates

NDS Spee-D Channel installed in driveway
NDS Spee-D Channel installed in driveway

Many folks think they have NDS Mini Channel when it could easily be Oldcastle or Carson – or vice-versa. These grates are not interchangeable.

The easiest way is to take several photos of your drain and existing grates and the measurements of the grate.  Email them to us at Our experienced staff will determine what system you have installed. We can then recommend replacement options like polyolefin slotted or decorative grates.

We also carry a wide assortment of decorative cast iron, bronze and aluminum grates to fit your existing channel or catch basin.