This filter # 310011 is the replacement for the old style filter.
It comes with all of the different hose adapters to fit the various size hoses

SeaLand / Dometic 309310006 Vent Filter Replacement Cartridge 1"

Sealand
$117.00 $72.95 (You save $44.05)
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SKU 309310006
Weight 2.00 LBS
Height 4.00
Width 4.00
Depth 24.00
Availability In Stock

Dometic/SeaLand Sani Guard replacement Vent Filter (309310006) (1 inch hose).

Replace the Dometic / SeaLand Vent Filter once a year to prevent odors from escaping from the holding tank.