Galaxy Aqua Premier Installation Manual Better !new! May 2026

The Galaxy Aqua Premier is a 9.5kW unvented instantaneous electric water heater designed for efficient, direct-mains water supply. Whether you are performing a new installation or a direct swap, following the proper manual sequence—fixing, plumbing, then electrical—is critical for safety and warranty protection. Essential Installation Sequence Fixing to the Wall:

Position the unit away from direct spray and high enough so the handset cannot be immersed in used water. Use a 5.5mm masonry drill for fixing holes.

Mount the unit on a flat wall surface to prevent distorting the backplate, which can lead to a poorly fitting front cover. Plumbing Connections:

Flush the supply pipes to clear debris before connecting to prevent internal blockages.

Connect to a 15mm cold water mains supply with a minimum running pressure of 1 bar (at 9 liters/minute). galaxy aqua premier installation manual better

Pro Tip: Do not use plumbing jointing compounds, as they can damage the unit and void the warranty; use PTFE tape instead if necessary. Electrical Setup:

Ensure all wiring is supervised by a qualified professional.

Complete all plumbing and turn on the water supply before switching on the electricity to avoid running the unit dry. Key Features for Installers

Flexible Entry: The unit often features multiple cable and water entry points (top, bottom, side, or rear) for easier retrofitting. The Galaxy Aqua Premier is a 9

Corrosion Resistance: Built with a steel backplate for long-term durability.

Adjustable Power: Half-power selection can be configured during the installation process. Critical Safety & Troubleshooting

Thermal Cut Out (TCO): If the shower stops heating, it may have overheated. Check the TCO reset button (usually a white button at the top of the internal heating tank), but ensure the power is off before removing the cover.

Inlet Filter: If you experience weak flow, the internal inlet filter may be clogged with limescale or debris. Isolate both water and power before removing and rinsing it. The #1 Tip the Manual Forgets Leak test for 24 hours

Frost Protection: Never install the unit where it may be subject to freezing conditions, as frost damage is not covered by the warranty.

For detailed spare parts or specific troubleshooting guides, you can visit the Shower Doctor Galaxy Aqua Premier page or consult professional Q&A resources like JustAnswer.

The #1 Tip the Manual Forgets

Leak test for 24 hours.

The official manual says to check immediately. No. After you turn the water on:

Dry every connection with a paper towel.
Place a white paper towel under every fitting.
Wait 24 hours.
If the white towel has a blue/grey stain, you have a slow drip.

4.1 Mounting the Unit

Choose a suitable location for the unit, ensuring that it is level and securely fastened to the wall or a stable surface.
Use the mounting brackets provided to secure the unit to the wall or surface.

Step 6: The Drain Saddle Clamp – Most Botched Step

The manual says: “Attach the saddle valve to the drain pipe.” No nuance. Here is the better version:

Clean a section of your horizontal drainpipe (not the vertical one – horizontal prevents back-siphonage).
Drill a 1/4-inch hole with a cordless drill (not included in the manual’s tool list).
Stick the rubber pad over the hole.
Align the saddle halves and tighten screws evenly.
Push the red drain tubing fully into the barbed fitting until it clicks (not just “onto” – into).

Major warning: If your drain pipe is copper, do not use a saddle clamp. It will corrode. Instead, install a sanitary tee or call a plumber. The Galaxy Aqua Premier manual should print this in bold red.