Jiatong JT-750 DC Low Voltage Water Pump for Solar Heating and Underfloor Systems

The Jiatong JT-750 series is a range of compact, low-voltage DC water pumps engineered for specific roles in renewable energy and efficient home heating. Designed to circulate clean water, these pumps are a practical component for solar thermal hot water systems, where they boost circulation from panels to storage tanks, and for underfloor heating circuits, where they maintain consistent water flow. Their horizontal shaft placement and threaded connection options simplify installation into existing pipework, while their DC operation allows them to be powered directly from solar panels or battery banks, enhancing system efficiency by eliminating the need for AC power conversion.

Features and Construction

The JT-750 pump’s design prioritises reliability and compatibility with residential heating infrastructure. Its construction and specifications are tailored to handle the clear, treated water typically used in closed-loop heating systems without risk of blockage.

Material and Build

The pump housing and key components are constructed from engineering plastic, a material selected for its durability in water applications and resistance to corrosion. This contributes to the pump's light total weight of 0.18 kilograms, making it easy to handle and mount. The unit employs a jet pump principle with a single-stage, semi-open impeller design that features six impellers, a configuration aimed at moving water efficiently while minimising the chance of clogging from any minor particulates in clean water systems.

Size and Practical Fit

Practical integration is facilitated by the pump's horizontal shaft orientation and its choice of threaded connectors. It is offered in models with either 20 millimetre or 25 millimetre suction and outlet calibres, matching common small-bore heating pipe sizes. Furthermore, the threads are specified as either 4-point or 5-point, providing options to match different regional or system-specific fitting standards. This variety ensures installers can select the exact model (JT-750B4, B5, D4, or D5) for a seamless physical and hydraulic connection to the existing pipework.

Uses and Placement

This pump’s performance profile defines its ideal applications within domestic settings. Its operational parameters make it unsuitable for high-pressure mains water or dirty water applications but well-matched for controlled heating environments.

Event or Professional Use

For professional installers and renewable energy specialists, the JT-750 serves as a reliable component in bespoke solar thermal installations. Its ability to run on 12V or 24V DC power means it can be integrated into off-grid systems or those designed for maximum solar direct-drive efficiency, eliminating inverter losses. The specified flow rate of 1.2 cubic metres per hour and a head pressure of 3 to 7 metres is engineered to overcome the resistance in a typical array of solar collectors and the piping run to a hot water cylinder, ensuring effective heat transfer from the panels.

Everyday Home Use

In a residential context, this pump is primarily intended for closed-loop hot water circulation. Its most common function is as a booster pump in a solar water heater system, actively moving heated water from the roof-mounted collectors down to the storage tank. An equally relevant application is within a wet underfloor heating manifold, where it circulates warm water through the floor circuits to provide consistent room heating. Its ‘non-blocking’ performance characteristic is key here, as these systems use clean, inhibitor-treated water to prevent scale and sludge buildup that could damage the pump or pipework.

Benefits and Buying Value

The value of the JT-750 pump lies in its specialised design meeting clear technical requirements, its energy-efficient operation, and the flexibility offered by its model variants.

Reuse and Low Maintenance

Constructed for clean water service, the pump’s maintenance demands are inherently low. The engineering plastic housing resists corrosion, and the semi-open impeller design is less susceptible to fouling than other types. By matching the correct model to the system's voltage and thread type from the outset, users ensure long-term compatibility and reliable operation, reducing the likelihood of premature failure or the need for adaptors and modifications.

Why Choose This Product

Choosing the Jiatong JT-750 is a decision based on specification matching. It is not a generic pump but a specific tool for a specific job: circulating clean water in low-voltage DC systems. The clear range of model codes (JT-750B4-12V, JT-750D5-24V, etc.) allows buyers to precisely select the voltage (12V or 24V) and connection type (4-point or 5-point thread, 20mm or 25mm) required for their project. This specificity prevents installation issues and ensures the pump’s performance—its 1.2 m³/h flow and 3-7m head—is appropriately applied to solar thermal or underfloor heating circuits, providing a focused and efficient pumping solution.