Perlick Faucet 650ss Forward Sealing Flow Control Beer FaucetIn addition to the Perlick faucet's exclusive forward sealing design features, the 650SS Forward Sealing Flow Control Beer Faucet features a flow compensator. The flow compensator provides more control because by adjusting the flow control handle, you can adjust the restriction for hard to pour beers. You can also adjust the flow control handle to slow the flow for beer sample glasses, flights, or beer growlers as well as reduce the amount of foam