JT-750 DC Solar and Floor Heating Booster Pump with 12V/24V Operation and Threaded Ports

This JT-750 series DC water pump is engineered as a compact, low-power circulation unit for domestic renewable energy and heating systems. Designed specifically for handling clean water, its primary application is within solar thermal water heating setups and hydronic underfloor heating circuits where a dedicated, efficient circulation pump is required. Operating on a 12-24V DC supply, it eliminates the need for an AC inverter when powered directly from solar panels or battery banks, simplifying system design for off-grid or energy-efficient installations. With a flow capacity of 1.2 cubic metres per hour and the ability to generate a head pressure of 3 to 7 metres, it provides sufficient force to move water through typical domestic pipework, ensuring consistent heat transfer from collectors to storage tanks or across floor heating loops.

Features and Construction

The JT-750 pump is built around a practical design focused on reliable operation within its specified clean-water duty. Its construction and electrical specifications are tailored for integration into DC-powered systems commonly found in solar and auxiliary heating applications.

Material and Build

The pump's core construction utilises engineering plastic for its housing and key components. This material choice provides a corrosion-resistant build that is suitable for long-term contact with clean water, avoiding the rust concerns associated with some metal pumps. The internal pumping mechanism is based on a jet pump principle, employing a single-stage design with six semi-open impellers. This impeller type is selected for its balance between pumping efficiency and resistance to minor debris, contributing to the stated non-blocking performance characteristic. The pump shaft is arranged horizontally, a common orientation for inline installation within pipework.

Size and Practical Fit

Weighing only 0.18 kilograms, the pump is a lightweight component designed for easy handling and installation. Its critical connection sizes are the inlet and outlet ports, which are offered in two standard diameters: 20mm and 25mm. These ports feature threaded connections, described in the model codes as either 4-point or 5-point thread. The specific thread size is integral to the model number (e.g., JT-750B4 indicates a 4-point thread). This clear coding allows installers to select the correct pump variant to match their existing pipe fittings, ensuring a leak-free and secure mechanical connection into the heating circuit.

Uses and Placement

The pump's performance parameters and DC operation define its ideal roles within residential heating and hot water systems. It serves as a connecting component between energy collection and storage or distribution points.

Event or Professional Use

While primarily for domestic systems, this pump can be specified by heating engineers and solar installers for professional retrofit or new-build projects. Its low voltage operation makes it a safe choice for installers, and the availability of different thread sizes allows for flexibility when integrating into systems with varied pipework standards. The clear model numbering system (JT-750B4, B5, D4, D5 for 12V; similarly for 24V) aids professionals in ordering the precise variant required for a job, preventing installation delays or compatibility issues.

Everyday Home Use

For homeowners with solar thermal panels or a wet underfloor heating system, this pump acts as the circulation heart. In a solar setup, it moves heated water from the rooftop collectors down to the hot water cylinder. In a floor heating system, it circulates warm water from the boiler or heat pump through the network of pipes under the floor. Its quiet operation and lack of requirement for a high-power AC supply make it a discreet and energy-conscious component of the home's heating infrastructure, working automatically as part of a controlled system.

Benefits and Buying Value

The value of this pump lies in its targeted design, which offers practical advantages for specific circulation tasks without unnecessary complexity or cost.

Reuse and Low Maintenance

The engineering plastic construction and clean-water-only designation suggest a pump designed for longevity in suitable conditions. With no metal parts exposed to water that could corrode, and with its non-blocking impeller design, the pump is built to require minimal intervention once correctly installed. Its durability is tied directly to operating within its specified parameters—using clean water and the correct DC voltage. This focus on a defined operating envelope helps ensure reliable performance over time.

Why Choose This Product

This JT-750 pump is selected for scenarios where a small, efficient, and DC-compatible circulation pump is needed. It is not a general-purpose pump but a specialist component for solar water heating and auxiliary hydronic heating loops. The key decision factors are its voltage (12V or 24V DC), its flow and head performance (1.2 m³/h, 3-7m), and its connection size (20mm or 25mm threaded). For systems designed to run on low-voltage DC power, perhaps directly from solar panels or a battery bank, this pump provides a matching component that avoids the energy losses associated with DC-to-AC conversion. Its clear model structure allows for precise matching to system requirements.