The SaniGard OEM Vent Filter 310003 1 1/2" has been discontinued.
They have been replaced by the new Eco Holding Tank Vent Filter 311004
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This Sealand Sanigard vent filter is a great product. This actually helps filter out odor. The last thing you want when you are on your boat is a stinky toilet. This goes a long way to eliminate that. This was such a great deal. I can't believe I saved so much on it!
Sealand Sanigard Vent Filters are the best. The cartridge will last you an entire season! At over $45 off, this is such a great deal.