- 4 in. Black Atrium Grate
- Flat top structural foam polyolefin atrium grate with UV inhibitor.
- Open surface area of 17.00 Sq.In.
- Flow rate of 52.01 gpm.
- Fits 4 in. sewer & drain pipe & fittings, 4 in. corrugated pipe, & 4 in. triple wall pipe.
- Made of plastic.
- Black finish.
- Limited lifetime warranty.