Need to drain excess stormwater from mulchy areas? The 12 in. Low-Profile Adapter Kit is just what you need to take care of heavy flows from mulched landscape beds and natural growth areas. Kit includes a 12 in. square low-profile adapter made of high-impact polystyrene (HIPS), atrium grate made of high-density polyethylene (HDPE), and one outlet adapter. The low-profile adapter is ideal for spaces where a traditional catch basin won’t fit, and the domed atrium drain grate blocks leaves, mulch, and other debris near the base while water continues to drain through the top. Included outlet adapter connects to 3 in. & 4 in. sewer and drain, single-wall corrugated, triple-wall, and DWV/Sch. 40 pipes.