The BritTherm S4 is a high-efficiency, multi-speed domestic circulating pump designed for reliability and ease of installation. Built to meet the demands of modern heating systems, the S4 range offers a robust solution for circulating hot water in closed-loop central heating systems and underfloor heating setups. Whether you are replacing an existing unit or installing a new system, these pumps provide consistent performance with minimal noise.
Constructed with a durable cast iron body and featuring a ceramic shaft, the S4 is engineered for longevity. It serves as an ideal, cost-effective replacement for many industry-standard pumps. The manual three-speed control allows installers to fine-tune the flow rate to match the specific requirements of the property, ensuring optimal energy efficiency and system balance.
Key Features
Three-Speed Manual Control: Adjustable settings to optimise flow and reduce energy consumption.
Universal Fit: Standard port-to-port dimensions for straightforward retrofitting.
Durable Construction: Features a high-grade cast iron pump housing and ceramic bearings for quiet operation.
Wide Compatibility: Suitable for domestic heating systems, including radiator and underfloor circuits.
Reliability: Designed to withstand high operating temperatures and continuous use.
Product Specifications & Model Comparison
The BritTherm S4 range includes various models to suit different head requirements and installation footprints. Use the table below to identify the correct model for your heating system.
Model Number
Max Head (m)
Port-to-Port (mm)
Connection Size
Power Supply
S4 25/4-180
4m
180mm
1 ½" BSP
230V / 50Hz
S4 25/5-180
5m
180mm
1 ½" BSP
230V / 50Hz
S4 25/6-130
6m
130mm
1 ½" BSP
230V / 50Hz
S4 25/7-130
7m
130mm
1 ½" BSP
230V / 50Hz
Installation Guidance
The S4 series is designed for ease of use. Ensure the pump shaft is installed horizontally to prevent air pockets and premature wear on the bearings. With its standard 1 ½ inch threaded connections, it integrates seamlessly into most UK domestic pipework. Always ensure the system is thoroughly flushed before installing a new pump to maintain the manufacturer's warranty and extend the life of the unit.
