The Intertap faucet is a forward-sealing faucet similar to the Perlicks. It has a modular, threaded spout that can fit a variety of different attachments, including a growler filler or a stout spout.
In rear-sealing faucets, the entire faucet has to drain beer. In forward-sealing faucets, the faucet keeps beer in it so the inside doesn't have a chance to get sticky, making cleaning much easier. It also reduces the chance of off flavors transferring to your beer while you pour.
Other forward-sealing faucets use a floating o-ring, which is just as sanitary but requires the o-ring to move inside the faucet body to seal correctly. This can become a problem as the faucet ages. Intertap faucets use a sliding shuttle that guides the o-ring into the perfect position every time.
The threaded spout easily unscrews from the faucet and can be replaced by a growler filler or stout spout quickly and easily. Pour a pint and then fill a growler in no time at all.