The Stuart Turner Mini Water Conditioner (44785) is a compact, in-line catalytic water conditioner with ½" BSP connections, designed specifically for single-point applications such as shower heads, mixer showers, and individual appliances in hard water areas. It contains no chemicals, uses no electricity, and needs no maintenance over its 10-year warranty life — simply fit it in-line and it works passively every time water flows through it.

Inside the stainless steel body, a unique catalytic alloy core causes the dissolved calcium carbonate in hard water to precipitate into harmless microscopic crystals. Rather than depositing as scale on surfaces, these crystals remain suspended and pass through with the flow — keeping shower heads, outlets, and appliances scale-free and easy to wipe clean, whilst maintaining full flow rate throughout the product's life.

½" BSP M/F 3–14 L/min No Chemicals No Power Required Maintenance Free 10-Year Warranty UKCA / CE

Technical Specifications

Parameter	Value
MPN / Product code	44785
EAN / GTIN	5050400447856
Type	Catalytic water conditioner
Connection	G½" male × G½" female BSP (inline)
Flow rate range	3 – 14 L/min
Housing material	Stainless steel
Active element	Proprietary catalytic alloy core
Power required	None — passive operation
Chemicals / salts required	None
Treated water	Safe to drink
Length	80mm
Width × Height	25mm × 25mm
Weight (inc. fittings)	0.19 kg
Warranty	10 years (registration required at stuart-turner.co.uk)
Conformity	UKCA / CE
Manufacturer	Stuart Turner Ltd, Henley-on-Thames, Oxfordshire RG9 2AD

Key Features

Catalytic limescale prevention

The catalytic alloy core triggers calcium carbonate to crystallise as microscopic floating particles rather than adhering to pipe walls, shower heads, or appliance internals. Scale prevention happens automatically every time water passes through — no user action required and no reduction in effectiveness over time.

Fits in under 60 seconds — no tools

The ½" BSP male × female configuration means the Mini screws directly inline into any standard ½" shower hose or fitting connection. No tools are required and installation takes under a minute — ideal for retrofitting to an existing shower without any pipework modification.

Zero running costs — truly maintenance free

No salt top-ups, no filter cartridge replacements, no electricity, no servicing. The catalytic core does not deplete or require regeneration — once installed, the only commitment is the 10-year warranty registration on the Stuart Turner website.

Treated water remains safe to drink

Unlike salt-based water softeners, the catalytic conditioning process adds nothing to the water and removes nothing — the mineral content is unchanged. The water is simply conditioned to prevent scale adhesion. Treated water is confirmed safe to drink by Stuart Turner.

Ultra-compact stainless steel body

At just 80mm long and 25mm across, the Mini is small enough to fit in concealed shower valve connections, thermostatic mixer inlet hoses, and other space-restricted locations. The stainless steel housing resists corrosion and handles the full range of hot and cold water pressures found in mains and unvented systems.

Environmentally friendly

No chemicals, no salt discharge, no plastic consumables, no energy use. Compared to salt-based softeners, the Mini has effectively zero environmental impact across its lifetime — and protects appliances from scale, extending their working life and reducing the carbon cost of premature replacement.

Typical applications: Thermostatic shower valve inlet (hot or cold supply), electric shower inlet, single shower hose connection, mixer tap inlet, combi boiler tap connections, and any individual ½" BSP appliance outlet in a hard water area. For whole-house protection across multiple outlets at the mains entry point, see the Stuart Turner C3-22 (MPN 44617) compression-fit range.

Mini vs C-Series — which to choose: The 44785 Mini is designed for single-point use at 3–14 L/min — ideal for one shower or one appliance. It is not designed to treat the whole-house mains supply. For whole-house protection installed on the mains entry (up to 22 L/min), the Stuart Turner C3-22 (44617) with WRAS approval and compression fittings is the appropriate product. If in doubt, fit the Mini per outlet in hard water areas where individual protection of high-value appliances is the priority.

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