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Press release #Mobility Aftermarket
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Bosch offers energy-efficient 12V water-circulating pump for modern heating systems

New water pump in a robust, compact design, ideal for hot-water circuits

  • Very good electromagnetic compatibility thanks to 12-volt power supply
  • Easy hose assembly for uncomplicated maintenance and replacement
  • Compact design weighing only 550 grams
Nico Krespach

Nico Krespach

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Karlsruhe, Germany – Modern heating systems with heat pumps and compact hot-water tanks take up significantly less space in the house than conventional heating systems. In addition, they are typically very energy efficient. Bosch has taken its automotive water pump, which has proven itself millions of times over, and modified it for use as a water-circulating pump. Instead of the usual 230 volts in European household electricity, this pump operates at 12 volts. With a compact design and weighing only 550 grams, the pump also saves space, since it is integrated into the internal hot-water circuit. For example, it can be installed between the heat exchanger and the water storage tank. In addition, the new Bosch water pump is designed for connection to flexible hoses. In a compact complete system, this facilitates assembly using hose clamps or clips instead of the usual pipe mounting.

Low noise, high energy efficiency

The Bosch water-circulating pump follows the trend in modern heating systems. Previously, such systems – most of which ran on oil or natural gas – were located in dark basement rooms, but modern heat-pump systems are found in brightly lit utility rooms. This places new demands on the design of today’s heating systems: they should save as much space as possible while still being visually appealing. Bosch’s compact 12-volt circulating pump is a good fit for such systems. The brushless pump, equipped with a robust ceramic shaft, is also impressively quiet in operation and includes a diagnostic and monitoring function that protects it from blocking, overheating, or dry running. With an energy efficiency index less than 0.21, it is also suitable for solar and battery applications where energy consumption is a key criterion. Stable control of the pump via a pulse-width modulation (PWM) signal ensures the volume flow is regulated as required, even at low pump speeds.

Bosch at the SPS industrial trade fair in Nuremberg

An international industrial customer team of experienced Bosch engineers and technical experts will be on site at the SPS trade fair in Nuremberg. They will be available to answer questions and project inquiries from November 14 to 16 in hall 1, booth 430.

For more information about the product, click here.

The Bosch Mobility Aftermarket division (MA) is one of the world’s leading providers of spare parts, diagnostic solutions and repair-shop equipment for passenger cars, two-wheelers and commercial vehicles. Its product portfolio includes products made as Bosch original equipment, products developed in-house and specifically manufactured for the aftermarket, as well as services. In addition to new parts, the range also comprises a large number of remanufactured exchange parts, thereby contributing to a resource-conserving circular economy. A key pillar in this context is the Bosch eXchange program, with which the division generated around 400 million euros in sales in 2025. Around 16,000 associates and a global logistics network ensure fast and reliable supply to distributors and repair shops worldwide. MA also supplies modern testing and repair-shop technology, diagnostic software, training, as well as technical information and services, which are increasingly being expanded through software- and AI-based solutions. In addition, the division includes the “Bosch Service” workshop concept with around 13,000 workshops worldwide, as well as “AutoCrew” with more than 700 workshops in over 100 countries. Furthermore, with Bosch Classic, MA supports owners of classic and modern classic cars with a wide range of spare parts and services.

Additional information can be accessed at http://www.boschaftermarket.com

The Bosch Group is a leading global supplier of technology and services. It employs roughly 413,000 associates worldwide (as of December 31, 2025). The company generated sales of 91 billion euros in 2025. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. With its business activities, the company aims to use technology to help shape universal trends such as automation, digitalization, electrification, and artificial intelligence. In this context, Bosch’s broad diversification across regions and industries strengthens its innovativeness and robustness. Bosch uses its proven expertise in hardware, software, and services to offer customers cross-domain solutions from a single source. It also applies its expertise in connectivity and artificial intelligence in order to develop and manufacture intelligent, user-friendly, and sustainable products. With technology that is “Invented for life,” Bosch wants to help improve quality of life and conserve natural resources. The Bosch Group comprises Robert Bosch GmbH and its roughly 500 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. Bosch’s innovative strength is key to the company’s further development. Bosch employs some 82,000 associates in research and development.

Additional information is available online at www.bosch.com, www.bosch-press.com.

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