ADA compliant / heel proof - fits 3 In. sewer and drain pipe and 4 In. sewer and drain fitting. NDS is committed to providing the highest quality solutions for your drainage problems. Our high quality satin brass finish is shipped with a clear film that protects the grates and prevents damage to the finish during transit and installation. Our solid brass grates are secured to a PVC collar with solid brass screws. The PVC collar can be solvent welded into sewer and drain fittings, or pipe. The grate can still be removed for easy cleanout. Brass grates are recommended for highly visible entry areas, decks, walkways, swimming pools, and spas.