NDSCatch Basins
NDS catch basins capture surface water at a single low point and route it underground. The square line spans 9”, 12”, 18”, and 24” — polypropylene at the small sizes, HDPE at 18” and 24” — with load ratings up to 575 psi when concrete-encased. The 6” round Spee-D basin handles lighter landscape duty and pairs with pop-up emitters. The 12” square is the most popular residential size.
Which NDS Catch Basin Size?
Pick the basin by the area it drains and the traffic it sees. The 6” round Spee-D basin suits small landscape low spots and downspouts and is Class A (pedestrian). The 9” and 12” square basins (polypropylene) cover most residential lawns, patios, and driveways. Step up to 18” or 24” HDPE basins for larger drainage areas or heavier flow. All square basins accept 3”–12” outlets via 2 or 4 pre-molded knockouts and reach up to 575 psi with 8” of concrete encasement and a cast-iron grate.
Match the basin to its outlet pipe with NDS adapters & outlets, then choose a flat or leaf-shedding atrium grate from the NDS grate catalog. For sheet flow across a paved surface rather than a single low point, use a channel drain instead.
NDS Catch Basin Systems
Comprehensive point drainage solutions for collecting and directing stormwater runoff in residential and commercial applications.
Square Catch Basins
Versatile square basins for collecting surface water from lawns, patios, and downspouts.
Lawns, Patios, Downspouts, Driveways
Spee-D Catch Basins
Compact round basins designed for residential drainage and pop-up emitter systems.
Lawns, Landscaping, Pop-up Emitters
Adapters & Outlets
Universal outlets and drain adapters for connecting catch basins to drainage pipe.
All Catch Basin Installations
NDS Catch Basin FAQs
Common questions about NDS catch basin sizes, materials, and load ratings
NDS square catch basins are available in 9", 12", 18", and 24". The 9" and 12" sizes are molded in polypropylene; the 18" and 24" sizes are HDPE. NDS also makes a 6" round Spee-D catch basin for lighter landscape duty. The 12" square basin is the most popular residential size.
NDS square catch basins support up to 575 psi when installed with 8 inches of concrete encasement and an appropriate cast-iron grate. The 6" round Spee-D basin is rated for Class A pedestrian loads. Always match the grate to the expected traffic.
NDS square catch basins have 2 or 4 pre-molded knockouts that accept outlet pipe from 3" to 12". Use NDS universal outlet and reducer adapters to connect to PVC or corrugated pipe, and add risers in 6" increments to reach the required depth.
Square catch basins (9"–24") handle larger drainage areas, higher flows, and heavier traffic up to 575 psi. The 6" round Spee-D basin is a compact, high-impact-styrene unit for small landscape low spots, downspouts, and pop-up emitter systems, rated for pedestrian loads.
Use a flat grate for general surface collection, an atrium (raised dome) grate where leaves and debris would clog a flat grate, and a cast-iron grate for vehicular traffic. Browse and filter all options in the NDS grate catalog by load class, material, and ADA compliance.
Use a catch basin to collect water at a single low spot, such as a yard depression or downspout outlet. Use a channel (trench) drain to intercept sheet flow running across a paved area like a driveway, patio, or pool deck. Many sites use both, with catch basins as collection points along a channel run.
Related Products & Applications
NDS basins are one brand inside the wider catch basin product category. For sheet flow across a paved surface rather than a single low point, use a trench drain instead. Catch basins are the workhorse for collecting point runoff in settings such as:
- Yard and lawn low spots
- Downspout collection
- Driveways and aprons
- Patios and walkways
Need Help Selecting Catch Basins?
Our drainage specialists can help you choose the right catch basin size and configuration for your stormwater management needs.