If you’re choosing water treatment, start with the problem you need to deal with - scale, taste, or debris in the supply. A water softener suits hard water and limescale control. A water filter is the better call for sediment or a single outlet, while whole-house kit covers every draw-off point. Under sink water filter options are usually the neater choice when you only need drinking water sorted.
Calmag Replacement Bulb for Calultra 22
Replacement UV bulb for the Calmag Calultra 22 water treatment system
1 Stage Point of Use Filter - Sediment, Odour, Taste & Chlorine Cartridge
10 inch point-of-use water filter kit for sediment, odour, taste and chlorine re…
Plumbright Compression Magnetic Scale Reducer - 15mm
15mm compression magnetic scale reducer for limescale prevention
Sentinel Eliminator Vortex300 Best Practice Protection Pack
All-in-one heating system protection pack with filter, cleaner and inhibitor
Scalemaster Magnetic Speedfit Scale Inhibitor - 15mm
15mm magnetic scale inhibitor with Speedfit connection for boilers.
Cistermiser CombiPhos Crystal Refill Jar
800g Combiphos refill jar for Combimate scale reducer, food grade
Scalemaster Boiler Install Pack - 5 Pack
5-piece boiler installation pack with cleaner, inhibitor, filter, filling loop a…
Monarch Tablet Water Softener Salt - 25kg
High purity 25kg tablet salt for water softeners, BS EN 973 Class A approved.
Calmag Water Softener Metered Unit - 12.5L
12.5-litre metered water softener for up to 15 people
Calmag Calro Carbon Block Cartridge for Calro Unit
Carbon block cartridge for Calro unit, 30L/min
Start with the space you’ve actually got and how the kit will be used, because that usually sets the spec before you get into finishes or extras. A compact under sink water filter works when you only need treated water at one outlet and cupboard room is tight. A whole house water filter or water softener comes into play when the job needs treatment across the full supply. The awkward jobs are the ones where the unit is too bulky for the cupboard or the pipe run leaves no sensible service access. That’s where the choice gets narrowed down.
The first split is usually between a water softener and a water filter. Softeners suit jobs where scale is the problem and the system needs protecting. Filters make more sense when you’re dealing with debris, taste, or general mains quality.
A water treatment system can cover more than one job. The trade-off is more to service later and less simplicity on the install. Most mistakes come from fixing the symptom and leaving the real complaint in place. If you’re working back through Plumbing, that’s usually where the spec starts to narrow.
What you buy comes down to the fault you’re dealing with and how much of the supply needs treating. A water softener is the usual call where limescale is the problem. It won’t suit a job focused on taste, sediment, or broader water treatment.
A whole house water filter covers every outlet, so it fits when the full supply needs attention. An under sink water filter is the neater pick when only one draw-off matters and space is tight.
If access is awkward, think ahead to Access Panels. If you’re tying into the waste side, Waste Pipe & Fittings usually need sorting at the same time.
Once the main kit is chosen, the next call is usually what needs opening up, boxed in, or finished around it. Access panels matter here. If you can’t get back to the valve or cartridge without damage later, the install isn’t right.
Waste pipe and fittings are the other bit that gets missed until the end. That can slow the job down if the outlet position hasn’t been thought through early. Keep the surrounding finish in mind as well. The cleanest water treatment install leaves proper access and a clear route for the pipework, not a setup that needs revisiting because the last fixings went in too soon.










