Rocket Appartamento Espresso Machine Used for 3 years and has undergone regular maintenance at Kafa Shop. The machine is honestly clean. Heat Exchanger Boiler: A 1.8-liter copper boiler provides excellent steaming power, allowing you to prepare espresso and steam milk simultaneously without any delay. E-61 Group Head - The professional E61 brewing group with a dual pre-infusion system ensures balanced extraction that highlights the full flavors and notes of your specialty coffee. Vibratory Pump - Durable, stable, and economical vibratory pumps are among the most common found in home espresso machines. The only downside is the noise level. However, the espresso quality from these machines surpasses that from machines with rotary pumps. Removable 2.5-liter Water Tank - The Appartamento espresso machine cannot be directly connected to a water line, but it comes with a large, removable 2.5-liter water tank.