Berkey blocking plug for plugging unused filter holes in stainless steel systems. Comes with 2 washers and a wing nut. Sold individually.
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This was by far the best price for the plugs and they were perfect. Shipping very fast too! I'm coming back to getberkey when I need anything for my berkey systems!
For a less elegant solution you can use a rubber cork, parts for berkey/alexapure/etc are hard to come by. Thank you getberkey.com for having this one available outside of usual $28 bereky parts kit.
I got my British Berkefeld from a friend who moved overseas and it had these little plastic plugs blocking the unused filter holes. These eventually failed and unfiltered water started dripping through. These little guys are amazing and solved that problem. Just don't make the mistake I made and misread the product description: it comes with 2 washers not 2 plugs! Buy two if you need to plug two holes!