Wilo-STAR-Z 20/7-3(150mm) circulation pump 4081203

Circulation pump for efficient heat and domestic hot water distribution

The Wilo-STAR-Z 20/7-3 pump is a reliable device designed for circulating water in heating systems and domestic hot water installations. The pump's construction, with a bronze body and a glass fiber reinforced polypropylene impeller, guarantees durability and corrosion resistance. Three-speed control allows you to adjust the performance to current needs, which translates into energy savings. The mounting length of 150 mm makes it easy to install in existing installations.

Construction and application

The Wilo-STAR-Z 20/7-3 pump is designed to operate in systems with a maximum working pressure of 10 bar and a medium temperature of up to 65°C. It uses standard threaded connections of G 1¼ inch, which ensures compatibility with most installations. It is particularly recommended for use in residential and public buildings where quiet operation and reliability are required. It is worth paying attention to the materials used in production – the bronze pump body and the plastic impeller ensure long-term operation even in difficult conditions.

Key features and benefits

• Three-speed control: allows you to optimize pump operation to the current demand for heat or domestic hot water, reducing energy consumption.
• Durable construction: the bronze (Rg 5) body provides corrosion resistance and long life, and the PP-GF impeller is resistant to mechanical damage.
• Quiet operation: the design minimizes noise during operation, which is especially important in residential buildings.
• Easy installation: compact dimensions (mounting length 150 mm) and standard connections make installation and pump replacement easy.
• Hard water resistance: the pump is adapted to work with water with a hardness of up to 18°dH, which reduces the risk of scale buildup.
• High efficiency: the maximum pump capacity is 6.04 m³/h, and the maximum head is 6.019 m, which ensures efficient distribution of the medium in the system.
• Safety: the motor has insulation class F and protection class IP44, which guarantees safe operation in various environmental conditions.
• Reliability: the pump does not require maintenance, which translates into low operating costs.

The Wilo-STAR-Z 20/7-3 pump is a solid solution for installers looking for reliable equipment and for users who value comfort and energy savings. Its versatility makes it suitable for both new installations and for the modernization of existing heating and domestic hot water systems.