Aqualisa Quartz Digital Shower: Is It Worth It for London Homes?
The Aqualisa Quartz is one of the most popular digital shower systems in London. This guide explains how it works, its advantages in London hard water conditions, and what the installation involves.
How the Aqualisa Quartz Works
The Aqualisa Quartz is a digital shower system that separates the control interface from the valve body. The valve processor — a sealed unit containing the thermostatic mixing cartridge, the flow control, and the digital controller circuit — is installed remotely, typically in the airing cupboard, under the bath, or behind a panel near the shower position. The wall-mounted controller is a slim touch panel that connects to the processor via a low-voltage signal cable. This separation means that all the mechanical components that require maintenance are accessible without dismantling the shower enclosure, and the user interface can be positioned anywhere in the bathroom regardless of where the pipework runs.
The digital controller maintains the selected temperature to within one degree Celsius by continuously sampling the outlet temperature and adjusting the hot-cold mix in real time. Startup is instant — pressing the start button causes the system to run to temperature before the water reaches the shower head, so there is no cold flush when first entering the shower. Temperature selection on the digital controller is by simple up-down buttons with a clear numerical display, and the selected temperature is retained between uses. An eco-pause button suspends water flow at temperature without turning the system off — useful for hair washing routines where the flow is temporarily not needed.
Advantages in London Hard Water Conditions
The Aqualisa Quartz has a specific advantage in London hard water areas: the processor is sealed and the thermostatic cartridge is not directly exposed to the shower water in the same way as a conventional wall-mounted thermostatic valve. The water path through the processor is designed to minimise scale accumulation on the critical thermostatic components. Aqualisa also produces the iSystem variation, which includes an integrated water softener module that reduces the calcium content of the water flowing through the shower circuit — a significant benefit for London properties where limescale is the primary cause of shower component failure.
The remote processor location means that when maintenance is required — cartridge inspection, descaling, or component replacement — it is accessible from an airing cupboard or access panel without requiring the bathroom to be out of service for an extended period. Standard thermostatic valves installed flush to a tiled wall in a shower enclosure may require tile removal to access for major maintenance, making the Aqualisa Quartz approach particularly practical for London properties where bathroom renovation costs are high.
Installation Requirements
The Aqualisa Quartz requires a minimum dynamic water pressure of 0.1 bar for the gravity-fed version (Quartz Gravity) or 0.2 bar for the standard version. For most London flats served by gravity-fed hot water systems, the gravity-fed variant is the appropriate choice. The system is connected to hot and cold water supplies at the processor location, and a low-voltage cable runs from the processor to the controller panel. The cable can be run through the wall cavity or surface-mounted in a conduit, making it suitable for retrofitting into existing bathrooms without major structural work. The installation is carried out by a plumber qualified in digital shower systems. Prestige Engineers are Aqualisa-trained installers and cover all London boroughs for Quartz installation, servicing, and cartridge replacement.