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    GRAV Carbon Filter Adaptor - 420 Science - The most trusted online smoke shop.
    GRAV Carbon Filter Adaptor - 420 Science - The most trusted online smoke shop.
    GRAV Carbon Filter Adaptor - 420 Science - The most trusted online smoke shop.
    Customer Reviews
    4.7 Based on 18 Reviews
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    Filter Reviews:
    Mario P.
    United States United States
    I like it

    I bought two of these to replace the need for ash catchers w/ water. Easier to maintain and clean in my opinion, but hey, we all like what we like

    Tony G.
    United States United States
    Helps with phlegm

    If you’re a big time smoker and a tad bit lazy on cleaning/replacing your water daily buy this. I broke mine before so this is my second and they work so Well paired with a grav octobowl and Rez Block. Really heps keep your bong hits feeling like fresh clean hits. I don’t cough up any more phlegm.I change the rocks and soak the glass in smoke soap every 5-7 days.

    Michael J.
    United States United States
    A little too tall

    Works great as advertised but just a bit too tall

    420 Science GRAV Carbon Filter Adapter Review
    United States United States
    Great Addition

    As someone who's mostly switched over to concentrates and vaporizers but still enjoys a good flower rip, I was looking for basically anything that'd filter out most of the junk in smoke. Ended up with one of those percolating ashcatchers (which also work great) but was also interesting in the carbon filter. Overall, pretty solid. Came prefilled with charcoal and I just refill it from a giant tub meant for aquariums. Noticeably cuts down on that bong water smell that generally lingers, at the cost of THC. Make no mistake, you're losing a bit of your material as it passes through, but frankly it's pretty negligible. Not really sure what I'd do to improve it. The glass plug is kinda chincy but has zero effect on the product. If anything, I wouldn't mind seeing a half sized version for smaller pieces, but I'm weird and own tiny glass.