STUART Catalytic Water Conditioner | C46-75 | WRAS Approved

Description

The STUART Water Conditioner range uses a catalytic alloy core to prevent hard limescale from building up in domestic pipework, without chemicals, salt, or any electrical connection. Fitted in-line with the incoming mains water supply, just after the stopcock, it treats water as it flows through the property so that boilers, cylinders, showers, and kettles stay free of scale and continue running efficiently for years. Three sizes cover the full range of typical domestic flow rates, and the treated water remains safe to drink and can be stored for up to three months.

10 bar

Max pressure

10 yr

Warranty

~15 yr

Active lifespan

3–75

l/min range covered

0 W

No electrical power

WRAS

Approved product

How it works: the catalytic process causes calcium carbonate in the water to precipitate into microscopic crystals that float in suspension rather than adhering to pipe walls, cylinders, or heating elements — so hard water is conditioned without altering its chemistry or removing minerals.

Correct sizing is essential: model selection must be based on the actual measured flow rate of the property's incoming mains supply, not pipe diameter alone. Fitting a unit outside its optimum flow range will reduce conditioning effectiveness — measure demand first, then match it to the flow ranges in the variant table below.

Whole-house treatment

Conditions the entire mains supply from a single in-line fitting point, protecting every appliance and outlet downstream.

No chemicals or salt

Environmentally friendly catalytic action — no chemical dosing, no salt regeneration, and no consumables to reorder.

Maintenance-free

No ongoing costs and no electrical power required — once installed, it needs no servicing.

Flexible installation

Can be installed horizontally or vertically in any orientation, by any competent pipe fitter.

Durable stainless steel

Stainless steel housing built to handle continuous mains pressure with a long, reliable service life.

Regulatory support

Can play an effective role in supporting compliance with Part L of the Building Regulations on hard water treatment.

General

Type

Catalytic

Housing material

Stainless steel

Connection type

Compression

Maximum pressure

10 bar

Warranty

10 years (subject to conditions)

WRAS approval

Approved product (1606370)

Conformity certification

UKCA | CE

Model comparison

Model

Product code

Flow rate

Connection

Length

Diameter

Weight

C3-22

44617

3–22 l/min

15/22 mm

265 mm

27 mm

0.75 kg

C23-45

44618

23–45 l/min

22 mm

290 mm

34 mm

0.95 kg

C46-75

44619

46–75 l/min

28 mm

308 mm

42 mm

1.5 kg

Which size do I need?

Measure the actual flow rate demanded from the cold mains supply at the property, then choose the model whose optimum flow rate range covers that figure — C3-22 for typical single-outlet demand, C23-45 for larger properties, and C46-75 for high-demand or multi-outlet installations.

Is the treated water safe to drink?

Yes. Treated water is safe to drink and can be stored for up to three months, as the catalytic process does not add or remove any chemicals from the water.

Does it need power or maintenance?

No. The unit is maintenance free with no electrical power required — once fitted in-line with the mains supply, there is nothing to service, dose, or replace.

Can it be fitted in any orientation?

Yes, the compact design allows it to be installed horizontally or vertically, provided the flow direction marked on the unit is followed and fittings are secured at both ends.

How long does it last?

Stuart Water Conditioners have an average 15-year active lifespan, backed by a 10-year warranty subject to conditions.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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Required Heating

0

Watts

0

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