This document is the User Manual and Installation Guide of Dualstream System manufactured by Gah（Heating Products）Limited. It contains instructions on how to use and install the product and precautions to take.
This manual provides installation and operational instructions for GAH’s Dualstream domestic hot and cold water system. It covers safety precautions, system components, layout options, sizing requirements, and commissioning procedures. The system includes an unvented cylinder, accumulator, combination valve, and expansion relief valve to maintain consistent pressure and flow. Safety measures include electrical isolation, protective gear, and compliance with regulations. The guide also addresses system features like reduced pipework, no loft tank, and green technology.
The Dualstream system is designed for properties with low mains pressure (minimum 1 Bar at 9 L/min) and offers balanced hot and cold water supply. It includes optional solar integration and auxiliary heating. Installation must comply with building regulations and include proper valve placement and pressure settings. The manual includes diagrams and notes for correct setup and troubleshooting.
| Minimum Mains Pressure | 1 Bar |
|---|---|
| Maximum Water Flow Rate | 9 litres per minute |
| Accumulator Water Content | Up to 65% of gross volume |
The system requires a minimum of 1 Bar at 9 litres per minute, as per local water authority standards.
The accumulator stores cold water at mains pressure using a butyl diaphragm, maintaining pressure to hot and cold outlets when multiple taps are used.