JT-750 DC Water Pump for Threaded Solar Thermal and Underfloor Heating Circulation

The Jiatong JT-750 series represents a specialised DC-powered water pump designed primarily for integration into solar water heating circuits and underfloor heating booster systems. Operating on 12V or 24V direct current, this pump provides the necessary flow to move heated water efficiently through closed-loop systems without requiring mains AC power. Its construction from engineering plastic ensures compatibility with clean water, while the availability of multiple threaded connection sizes allows it to match common pipework in residential and light commercial installations. As a process pump with non-blocking characteristics, it focuses on reliability in circulation applications where consistent performance is more critical than variable speed control.

Features and Construction

The JT-750 pump is built around practical requirements for auxiliary heating systems, combining a simple drive mechanism with robust material choices. Its design prioritises straightforward installation and dependable operation in environments where power may come from solar panels or batteries, making it a sensible choice for off-grid or efficiency-focused upgrades.

Material and Build

Engineering plastic forms the core of the pump's construction, offering a balance between structural integrity and resistance to corrosion from clean water. This material choice avoids the potential for rust or degradation that can affect metallic components in closed water systems, particularly those with additives for frost protection. The pump employs a horizontal shaft orientation and a semi-open impeller design, which contributes to its stated non-blocking performance by allowing minor debris to pass through without immediate clogging. The jet pump structural principle provides the pressure boost necessary for circulating water through multiple metres of piping and heat exchangers.

Size and Practical Fit

With a compact footprint and a weight of just 0.18kg, the JT-750 is relatively easy to position within an existing system. The critical dimensions are the suction and outlet connections, offered in either 20mm (4-point thread) or 25mm (5-point thread) configurations. This choice allows installers to select the model that matches their existing pipe diameters without requiring adaptors. The pump's physical size is proportionate to its output, housing six impellers within a single-stage design to generate a flow of 1.2 cubic metres per hour—sufficient for most domestic solar thermal panels or underfloor heating manifold boosts.

Uses and Placement

This pump is specified for clean water conveyance, narrowing its application to systems where the fluid is primarily treated water without abrasive or chemically aggressive contaminants. Its design parameters make it suitable for specific roles within renewable energy and comfort heating setups, where its DC operation can be a particular advantage.

Event or Professional Use

For professional installers, the JT-750 provides a standardised component for solar thermal installations where a dedicated circulation pump is needed between collectors and storage tanks. Its threaded connections simplify integration into copper or PEX piping runs common in such systems. The availability of both 12V and 24V models allows selection based on the available control voltage from the system's controller or power supply, accommodating different design philosophies without modification.

Everyday Home Use

In residential settings, this pump can serve as a booster for underfloor heating circuits that may suffer from inadequate flow in longer loops or multi-zone layouts. Homeowners with existing solar water heaters might also use it to replace a failed circulation pump, provided the voltage and thread size match the original specification. Its operation is essentially set-and-forget once installed correctly, requiring no routine adjustment beyond ensuring power continuity.

Benefits and Buying Value

The value of the JT-750 pump lies in its focused design for a specific niche within heating and hot water systems. It avoids unnecessary complexity or features that would increase cost without adding functionality for its intended applications, presenting a straightforward solution to circulation requirements.

Reuse and Low Maintenance

Constructed from durable engineering plastic and with a non-blocking impeller design, the pump is intended for long service with minimal intervention. There are no user-serviceable parts specified, suggesting it is designed as a sealed unit for replacement rather than repair. This approach is typical for small circulating pumps where labour costs outweigh component costs. Its compatibility with clean water reduces the likelihood of internal scaling or corrosion that could shorten lifespan.

Why Choose This Product

Choosing the JT-750 is a decision based on matching technical specifications to system requirements. The clear differentiators are its DC voltage options, threaded connection sizes, and its performance parameters of 1.2 m³/h flow and 3-7m head. For anyone needing a small circulation pump that operates from a DC source—such as a solar thermal controller's pump output—and who has either 20mm or 25mm threaded connections, this pump provides a direct fit. It does not offer variable speed or smart controls, keeping it simple and cost-effective for applications where those features are unnecessary.