# NDS Combo 3 in. and 4 in. Plastic Atrium Grate, Black

**Brand:** [NDS](https://shop.coreranger.com/brands/NDS)
**SKU:** 78U
**Price:** $10.98 · in stock
**URL:** https://shop.coreranger.com/product/nds-combo-3-in-and-4-in-plastic-atrium-grate-black-207051129

## Specifications

| Spec | Value |
|---|---|
| Model # | 78U |
| Material | Plastic |
| Pack Size | 1 |
| Internet # | 207051129 |
| Grate Shape | Round |
| Store SKU # | 1001819334 |
| Color/Finish | Black |
| Product Depth (in.) | 4.5 in |
| Product Width (in.) | 4.5 in |
| Product Height (in.) | 4 in |
| Product Weight (lb.) | 1 lb |
| Manufacturer Warranty | Limited Lifetime |
| Pipe or Fitting Product Type | Accessory |
| Max. Compatible Pipe Size (In.) | 4" |
| Maximum Working Temperature (F) | 140 |
| Min. Compatible Pipe Size (In.) | 3" |

## Description

When draining moderate stormwater flows from mulched landscape beds, natural areas, window wells, and areas prone to debris, the atrium drain grate rises to the challenge. Unlike a flat grate that lies flush with the surface, the 4 in. Atrium Grate has a raised dome design that blocks leaves, mulch, and other debris near the base, while continuously allowing water to flow through the top. The 4 in. atrium dome drain grate has an open surface area of 21.5 sq. in. and a flow rate of 66 GPM. Connect to 3 in. & 4 in. sewer and drain pipe & fittings, 3 in. & 4 in. single-wall corrugated pipe, and 3 in. & 4 in. triple-wall pipe for a soil-tight fit. Built to stand up to the elements, the drain grate (or drain cover) is made of polyethylene, a type of plastic, using a combination of virgin and recycled content treated with UV inhibitors to prevent fading and cracking from the sun. As part of a complete drainage system, the grate drains water entering drain pipes. The pipes carry the water to a discharge point downstream such as a pop-up emitter, or to percolate into the ground with a dry well or infiltration trench. Start now and find the right drainage grate for your project with the free NDS Home Drainage Center tool at ndspro.com/home-drainage. NDS, founded in 1972, is the preferred choice of professionals and the leader in stormwater management solutions with proven products, tools, and support to help you get the job done right.

• Atrium drain grate connects to 3 in. and 4 in. drainage pipes
• Drain grate blocks debris from entering and clogging drain pipes
• 52 GPM flow rate; drains mulched landscape beds, window wells