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Scalemaster Water Softeners

Scalemaster Softline water softeners

Non-electric water softening for different homes and flow demands

Compare compact single-cylinder models, higher-capacity options and the twin-cylinder SL-Twin. The right choice depends on water hardness, available space, incoming pressure and peak demand—not the number of bedrooms alone.

Choose a model Compare specifications Water softener buying guide

Choose by priority

  • Compact all-round optionSL150
  • Space-conscious Softline modelSL-S
  • Greater capacity and flow demandSL-X
  • Continuous softened waterSL-Twin

Fast, free delivery

UK delivery without hidden charges.

Friendly expert support

Help checking the model before ordering.

Non-electric range

Water-powered, demand-led operation.

Ongoing care

Advice before and after your purchase.

Explore the Softline range

Which Scalemaster water softener should you choose?

These recommendations are useful starting points. Confirm your measured hardness, pressure, peak flow and installation space before making the final decision.

Scalemaster Softline SL150 water softener
Compact all-rounder

Scalemaster SL150

A compact, single-cylinder option for homes wanting efficient, demand-led softening without an electrical supply.

  • Single-cylinder design
  • Non-electric operation
  • Block or tablet salt compatible
View the SL150
Scalemaster Softline SL-S water softener
Space-conscious model

Scalemaster SL-S

A compact Softline model for installations where cabinet space matters but dependable non-electric softening is still required.

  • Single-cylinder design
  • Non-electric operation
  • WRAS-approved product
View the SL-S
Scalemaster Softline SL-X water softener
Greater demand

Scalemaster SL-X

The larger single-cylinder choice when capacity and higher flow demand matter more than achieving the smallest possible footprint.

  • Higher-capacity option
  • Non-electric operation
  • Block or tablet salt compatible
View the SL-X
Scalemaster Softline SL-Twin water softener
Continuous soft water

Scalemaster SL-Twin

Two resin cylinders allow one to continue supplying softened water while the other regenerates.

  • Twin-cylinder design
  • Soft water during regeneration
  • WRAS-approved product
View the SL-Twin

Compare before ordering

See the four models side by side

Use the dedicated comparison guide to review model type, dimensions, capacity and the practical differences between single- and twin-cylinder softeners.

Open the comparison guide

Why choose water softening?

Deal with hardness before it spreads through the home

Reduce limescale deposits

Softening removes the calcium and magnesium responsible for hard-water scale.

Protect water-using appliances

Reducing scale helps protect boilers, heating components and household appliances.

Make bathrooms easier to clean

Less scale means fewer chalky marks on taps, shower screens and fittings.

Use soap more effectively

Softened water allows soaps and detergents to lather more readily.

Understand the problem

What is hard water?

Learn what causes hardness, how it is measured and why the level varies between UK areas.

Read the hard-water guide

Plan the complete setup

Water softener buying and installation guide

Check siting, drainage, pressure, plumbing connections and model-selection factors.

Open the buying guide

Compare other brands

Browse all water softeners

Compare Scalemaster with other electric and non-electric softeners available from Regal Flow.

View all water softeners

Helpful answers

Scalemaster water softener FAQs

Are the Scalemaster Softline models non-electric?

Yes. The SL150, SL-S, SL-X and SL-Twin shown here operate without an electrical supply and regenerate according to measured water use.

Which model provides softened water during regeneration?

The SL-Twin uses two resin cylinders, allowing one cylinder to continue supplying softened water while the other regenerates. The other models shown are single-cylinder softeners.

Is the smallest model automatically the right choice?

No. A softener must be selected for water hardness, available pressure, peak flow and household demand as well as physical space. A cabinet that fits may still be incorrectly sized for the property.

Can Scalemaster softeners use block salt?

The four Softline models shown are listed as compatible with block salt and tablet salt. Follow the instructions for the specific model and use good-quality softener salt.

What should I check before ordering?

Confirm the incoming-main location, hardness, dynamic pressure, peak flow, available cabinet space, inlet and outlet pipework, drain route and overflow route.

Friendly expert support

Need help checking the right Scalemaster?

Tell us your postcode, measured hardness, plumbing system, available space and number of bathrooms. We will help you narrow down the suitable model before ordering.

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