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• When choosing the correct size, measure the OUTSIDE DIAMETER of your existing vent pipe.

  Pipe Width	1.900	2.375	3.500	4.500	6.625
  Filter Size	1.5	2	3	4	6

• Our Black ABS plastic is recommended for areas that experience freezing temperatures. Otherwise you can choose based on color preference.
• Our slip-on connections fit snugly on standard ABS/PVC vent pipes and no tools or glue are needed for installation. Our clamp-on connections are for use on cast-iron pipe or non-standard ABS/PVC vent pipe.
• Our Commercial Grade charcoal is made from a coconut shell based carbon. It is longer lasting than coal based charcoals and can absorb up to 4 times longer.