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

This JT-series DC water pump is engineered for closed-loop water circulation, specifically targeting renewable energy and efficient home heating applications. Its core function is to move clean water through solar thermal collector systems or underfloor heating pipes, acting as a booster to maintain consistent flow and heat transfer. Operating on a safe, low-voltage 12-24V DC supply, it offers an installation option for scenarios where standard mains power is inconvenient or where energy efficiency is a priority. With a selection of threaded port sizes and configurations, this pump is designed for practical integration into a variety of piping setups.

Features and Construction

The JT-750 pump's design prioritises straightforward functionality for water conveyance. Its construction and specifications are defined to meet the demands of continuous circulation in heating applications without complex maintenance requirements.

Material and Build

The pump housing and internal components are constructed from engineering plastic, a material choice that resists corrosion from water contact and provides a lightweight frame. This contributes to the pump's total weight of just 0.18 kilograms. The operational principle is that of a single-stage jet pump, which uses a semi-open impeller design. This impeller has six vanes and is described as having a non-blocking performance, suggesting it is suited to handling water free of large particulates that could cause jams.

Size and Practical Fit

Physical integration is facilitated by the pump's horizontal shaft orientation and its threaded connection ports. The available suction and outlet calibres are 20 millimetres or 25 millimetres. Furthermore, the product is offered in distinct model variants: JT-750B4 and JT-750D4 feature four-point threads, while JT-750B5 and JT-750D5 feature five-point threads. This allows for selection based on the specific thread standard of the existing pipework in your solar or heating system.

Uses and Placement

This pump is defined as a process pump for conveying clean water, which dictates its suitable applications. Its performance parameters make it a focused component within larger thermal systems.

Event or Professional Use

In professional or renewable energy contexts, the primary application is within solar water heating systems. Here, the pump circulates heat transfer fluid (water) from the solar collectors to a storage tank or heat exchanger. Its ability to operate on DC power makes it directly compatible with photovoltaic panels or battery banks often used in solar installations, avoiding the need for power inverters.

Everyday Home Use

For residential settings, a key use is as a circulation booster for wet underfloor heating systems. It can help overcome pressure drops in longer pipe runs or multi-zone setups, ensuring even heat distribution across all floor loops. The low-voltage operation can also be a safety and wiring simplification benefit in home environments.

Benefits and Buying Value

The value of this pump lies in its specific suitability for its intended tasks, its operational simplicity, and the clarity of its model options.

Reuse and Low Maintenance

The engineering plastic construction is resistant to water corrosion, which supports long-term use without degradation from the medium it pumps. The non-blocking impeller design aims to reduce the risk of operational failure due to debris, contributing to reliable performance with minimal intervention, provided it is used with clean water as specified.

Why Choose This Product

Choosing this model is based on matching its technical specifications to your system's requirements. The decisive factors are the required flow rate (1.2 m³/h), the necessary pressure or head (3-7 metres), the voltage of your available power source (12V or 24V DC), and the physical connection needed (20mm or 25mm ports with 4-point or 5-point threads). It provides a dedicated, compact solution for DC-powered water circulation where those parameters align.