This Sawyer Faucet Adapter is for all Sawyer Water Filters and Purifiers. It connects the inline filter/purifier to most water taps. The adapter head is made of flexible PVC, which allows connecting to several different size faucet mounts. This faucet adapter is used for backwashing all Sawyer Filters and Purifiers, extending their life. The fastest and easiest way to back-flush your Sawyer Mini. Quite fighting to get your filter back flushed.