The Thermoflow 5-liter under-sink water heater is a compact boiler for decentralized hot water supply at individual points of use, such as washbasins or small kitchen sinks. Designed for under-sink installation, it is particularly suitable for areas without a central hot water line or where small quantities of hot water are needed quickly. Its compact design allows for space-saving integration into the base cabinet and seamless integration into existing plumbing systems. With a 5-liter capacity, the heater is designed to meet typical needs in handwashing or kitchen areas. An integrated heating element quickly brings the cold water up to operating temperature. A thermostat then maintains a constant temperature, ensuring consistent use throughout the day without the need for constant reheating. The unit is designed as a low-pressure system and must only be used with a compatible low-pressure faucet. This design protects the inner tank from overpressure and ensures the safe operation of the closed system. This guarantees reliable operation even with regular use, provided the installation is carried out correctly. The design is geared towards easy installation and is generally delivered ready for connection. This simplifies mounting under the sink and significantly reduces installation effort. Electrical connection is typically made via a standard wall socket, eliminating the need for complex electrical work. For safety, the unit is equipped with a temperature regulator and overheat protection. These systems prevent the water from overheating and contribute to operational reliability in daily use. Additionally, the unpressurized design ensures controlled and safe water discharge. The inner tank is designed for continuous contact with hot water and is therefore corrosion-protected. This increases the unit's lifespan and ensures stable operation over an extended period. Furthermore, the thermal insulation reduces heat loss and contributes to efficient energy use. Overall, the Thermoflow 5-liter under-sink water heater is a practical and reliable solution for decentralized hot water supply, distinguished by its compact design, easy installation, and safe low-pressure operation.