• Clamp On Vent Stack Pipe Filter 3", Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odor Problems (3.0-inch) KWD 27.500
• Vent Stack Pipe Filter 4 Sizes, Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odors (3.0-inch) KWD 26.500
• Activated Carbon in Mesh Replacement Filter Bag, Fits 3-Inch, 2-Inch or 1.5-Inch OdorHog KWD 12.500