Galaxy Aqua Premier Installation Manual May 2026

The system requires 40–80 psi. If your home has water pressure above 80 psi, you must install a pressure reducer (not included in the standard kit) or you will void the warranty.

Scan the QR code on the side of the box, or check inside the manifold cover. If you are missing the Galaxy Aqua Premier installation manual PDF, you can usually request a digital copy from the retailer’s support portal.

Open the system’s flush valve or the faucet. Let water run for 2 minutes. Some sputtering is normal.

Because the Aqua Premier is a high-efficiency condensing boiler, it produces acidic water (condensate) during operation.

Before you pick up a wrench, make sure you have the correct manual for your model. The Galaxy Aqua Premier line includes several variants:

The Galaxy Aqua Premier Installation Manual is actually better than most. It includes color diagrams (which is rare for budget-friendly units). However, it assumes you know how to drill into a drain pipe and work under a sink.

My advice:

Have you installed your Galaxy Aqua Premier yet? Drop a comment below if you got stuck on the drain saddle step or the membrane seating—I’ve helped dozens of readers fix it in under 10 minutes.

Disclaimer: This guide is a summary of common installation practices. Always consult the specific physical manual included with your Galaxy Aqua Premier unit, as model specifications (GAP-1000, GAP-RO5, etc.) may vary.

The Galaxy Aqua Premier is a specialized unvented instantaneous water heater designed for high performance in compact spaces, such as undersink installations. Unlike standard electric showers, it is often used as a remote unit supplying hot water to one or two outlets, such as a washbasin or a shower. Core Installation Requirements galaxy aqua premier installation manual

To ensure safe and efficient operation, the installation must adhere to specific technical standards:

Water Supply: Must be connected to a 15mm cold water mains supply.

Minimum Running Pressure: 100kPa (1.0 bar / 15 psi) at a flow rate of 8 litres per minute (9 litres/min for 9.5kW units).

Maximum Static Pressure: Must not exceed 1000kPa (10 bar / 150 psi).

Electrical Connection: The 9.5kW model typically requires 10mm wiring and must be performed by a qualified person following IEE Regulations.

Mounting: The unit features a corrosion-resistant steel backplate with 3 wall-fixing positions, including a "key-hole" slot at the top for easier alignment during setup. Key Technical Features

Power Options: Available in various ratings, most commonly the 9.5kW variant, which offers a "Half Power" selection during installation for seasonal efficiency.

Instant Response: Designed with no standing heat losses, providing hot water on demand. Safety Safeguards:

Thermal Cut-Out (TCO): A safety assembly that stops heating if water becomes dangerously hot.

Pressure Relief Device: Protects the internal heat exchanger from high-pressure buildup. Troubleshooting & Maintenance The system requires 40–80 psi

The Galaxy Aqua Premier range often requires specific maintenance as it ages:

No Heat: Often caused by a tripped TCO (which can sometimes be reset via a white button on the assembly) or a faulty heating element.

Internal Cleaning: Limescale or debris in the balancing valve can cause temperature instability. Standard maintenance includes cleaning the inlet filter and the internal adjuster pin.

Critical Warning: Never use plumbers' jointing compound on connections; only use P.T.F.E. Tape, as compound can invalidate the guarantee. Galaxy Aqua Premier Water Heater 9.5Kw - 45793266

Galaxy Aqua Premier is an instantaneous electric water heater (typically 9.5kW) designed for unvented, direct mains supply to one or two outlets, such as kitchen sinks or bathroom basins. The Shower Doctor Installation Prerequisites Water Supply: Connect only to a 15mm cold water mains supply. Minimum Running Pressure:

1.0 Bar (100kPa / 15 psi) at a flow rate of at least 8–9 litres per minute. Maximum Static Pressure: 10 Bar (1000kPa / 150 psi). Electrical:

Must be installed by a qualified person and comply with current IEE wiring regulations.

Do not install where it may be exposed to frost or freezing conditions. National Shower Spares Key Installation Steps

Remove the front cover by unscrewing the two securing screws.

Place the backplate against a flat wall and mark fixing positions. Scan the QR code on the side of

Secure using the wall-fixing positions (typically 3) provided in the backplate. Ensure all plumbing connections are completed starting electrical work.

Install an isolating valve in the water supply for future servicing.

Do not use plumbers' jointing compound; use P.T.F.E. tape for difficult joints to avoid invalidating the guarantee. Electrical:

Connect to a 230/240V supply via a double-pole switched fused connection unit (3 Amp for some auxiliary motors, but the main heater requires a dedicated high-amperage circuit). Ensure the unit is adequately earth bonded. HSD Online Commissioning (Initial Setup) Flush the System:

Before turning on the power, turn on the water supply and allow it to flow through the unit to clear any air pockets. Check for Leaks:

Inspect all internal and external joints while the water is running.

Switch on at the consumer unit and isolating switch only after the unit is full of water to prevent damage to the heating elements. National Shower Spares Reference Resources

For detailed diagrams and part numbers (like the Thermal Cut-Out or Flow Switch), you can view specific guides on sites like The Shower Doctor or download similar fitting instructions from Hygiene Supplies Direct , such as a leak or no hot water? Galaxy Aqua Premier Water Heater 9.5Kw - 45793266