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CRYSTAL 35L Clack WS1 UF – Upflow Water Softener

€
1400
€
1350
CRYSTAL 35L Clack WS1 UF is an advanced automatic water softening system designed to protect household plumbing, bathroom fixtures, water heaters, and appliances from limescale buildup.
Hard water in Cyprus contains dissolved calcium and magnesium minerals that cause scale deposits on heating elements, white residue on bathroom surfaces, and mineral buildup inside pipes. CRYSTAL 35L effectively reduces water hardness using high-performance ion-exchange resin, providing soft water for everyday household needs.
Upflow Technology — Efficient Regeneration with Lower Salt Consumption
One of the key advantages of CRYSTAL 35L is its Upflow regeneration technology, which directs the regenerating brine solution upward through the ion-exchange resin bed, from bottom to top.
Unlike conventional Downflow regeneration, Upflow technology allows more efficient use of the regenerating solution and can restore the resin’s softening capacity while consuming less salt when the system is properly configured.
Advantages of Upflow Regeneration:
  • Reduced salt consumption. More efficient use of the regenerating solution helps minimize the amount of salt required for each regeneration cycle.
  • Lower water consumption. An optimized regeneration process can reduce the amount of water used during regeneration and rinsing.
  • Efficient resin regeneration. The upward brine flow supports effective regeneration of the ion-exchange resin, helping maintain consistent water-softening performance.
  • Less frequent maintenance. Efficient salt consumption can reduce how often the salt reservoir needs to be refilled.
  • Lower operating costs. Optimized salt and water usage can reduce the ongoing cost of operating the system.
Reliable Clack Automatic Control
The system is equipped with a reliable Clack WS1CI control valve, featuring a digital programmer and volumetric regeneration control.
The controller monitors actual water consumption and initiates regeneration according to the programmed settings. This helps prevent unnecessary regeneration cycles and reduces excessive salt and water consumption compared with conventional timer-based systems.
Compact and Practical Design
CRYSTAL 35L features a modern cabinet-style design that combines the ion-exchange resin vessel and salt reservoir in a single compact unit.
Its space-saving construction makes it suitable for installation in apartments, houses, and villas, particularly in utility rooms and other suitable technical areas with access to water supply and drainage.
Book a Free On-Site Visit, Water Hardness Test, and Technical Consultation with Our Specialist
Efficient Residential Water Softening

Compact Size. Intelligent Control. Reliable Soft Water.

CRYSTAL 35L Clack WS1 UF combines 35 litres of ion-exchange resin, demand-based automatic control and salt-efficient Upflow regeneration. It helps reduce limescale throughout the home without requiring a large separate salt tank.

01
35 L

Ion-Exchange Resin

High-capacity resin designed for domestic drinking-water softening.

02
1.9 m³/h

Rated Flow

Published flow rate for the CRYSTAL 35L model. Actual sizing depends on peak household demand.

03
Upflow

Optimized Regeneration

Counter-current brine regeneration designed to make efficient use of salt.

How It Works

Water Softening Through Ion Exchange

Hardness comes mainly from dissolved calcium and magnesium. The softener captures these ions on resin and exchanges them for sodium ions, reducing water's tendency to form scale.

01

Hard Water Enters

Incoming water flows through the ion-exchange resin bed.

02

Hardness Ions Are Exchanged

Resin retains calcium and magnesium ions, releasing sodium ions.

03

Softened Water Is Supplied

Water with reduced hardness is delivered to household outlets and appliances.

Hard Water → CRYSTAL 35L Clack WS1 UF → Softened Water
Salt-Efficient Upflow Regeneration

Why Regeneration Direction Matters

During normal service, resin gradually becomes saturated with calcium and magnesium. Regeneration restores its softening capacity. In the CRYSTAL system, the brine solution travels upward through the resin bed, a process known as Upflow or counter-current regeneration.

01

Efficient Salt Use

Counter-current regeneration can make better use of brine than conventional co-current approaches when correctly configured. The CRYSTAL technical sheet specifically identifies optimized, low-salt regeneration.

02

Regeneration Based on Water Use

The volumetric Clack WS1CI controller uses programmed settings and water consumption to manage regeneration, rather than relying on a fixed time interval alone.

03

Consistent Softening Performance

Proper regeneration helps restore the ion-exchange resin for continued hardness reduction between cycles.

04

Practical Running Costs

Salt-efficient regeneration helps manage ongoing costs. Exact salt and water savings depend on water hardness, operating settings and the comparison system.

How Upflow differs from conventional Downflow regeneration

In Downflow regeneration, brine travels from the top of the resin bed downward. With Upflow, brine enters from below and moves upward, reversing the service-flow direction in a typical counter-current design. This can improve regeneration efficiency, but a specific percentage saving is not stated in the CRYSTAL datasheet.

Whole-Home Protection

Less Scale. Easier Everyday Care.

Reducing calcium and magnesium hardness helps limit limescale deposits where household water is heated, sprayed or left to dry.

01

Showers & Taps

Fewer hard-water marks on glass, mixers and bathroom fittings.

02

Water Heaters

Less scale accumulation on heating surfaces and associated pipework.

03

Household Appliances

Helps protect washing machines and dishwashers against hardness-related deposits.

04

Cleaning & Comfort

Soaps and detergents generally work more readily in softened water.

Regeneration & Maintenance

Made for Straightforward Day-to-Day Use

A cabinet design integrates the resin vessel and salt storage, while the digital control valve manages regeneration. Owners mainly need to monitor and replenish suitable regeneration salt.

Salt per regeneration3.5 kg
Regeneration methodUpflow
ControlVolumetric / digital
BypassIncluded

Ongoing Care

  • Check and replenish regeneration salt as needed.
  • Keep the drain and overflow arrangements accessible.
  • Follow routine service recommendations for the feed-water conditions.
  • Have settings checked if inlet water hardness or household consumption changes.

The manufacturer's sheet does not specify salt storage capacity, regeneration water volume, service interval or a fixed percentage saving. These are deliberately not claimed here.

Technical Data

CRYSTAL 35L Technical Specifications

Product characteristics stated in the CRYSTAL technical sheet.

ModelCRYSTAL 35L Clack WS1 UF
Product typeCompact cabinet water softener
Treatment methodIon exchange
Resin volume35 L
Resin applicationHigh-capacity resin for domestic drinking water
Control valveClack WS1CI, volumetric, digital programmer
RegenerationOptimized Upflow
Flow1.9 m³/h
Salt per regeneration3.5 kg
Dimensions (W × D × H)320 × 500 × 1140 mm
Connection1″
Operating pressure2.5–6 bar
Maximum water temperature40°C
Power supply230 V / 50 Hz
BypassIncluded
35 LResin
1.9 m³/hFlow
3.5 kgSalt / cycle
2.5–6 barPressure
Installation Considerations

Plan the System Around Your Water Supply

The correct water softener size and settings depend on inlet hardness, desired outlet hardness, peak simultaneous demand and available pressure.

Typical Installation Arrangement

Mains Water → Suitable Sediment Pre-Filter → CRYSTAL 35L → Household Water Distribution

The pre-filter is a general installation recommendation, not a component specifically listed in the CRYSTAL datasheet. Confirm suitable filter specifications with the installer.

Before Installation

Verify pressure, hardness, physical clearance, power availability and suitable drainage for regeneration discharge.

Outdoor or Rooftop Locations

Do not assume the cabinet is weatherproof. Confirm protection from direct sun, rain and high ambient temperatures before selecting an outdoor installation location.

A water softener reduces hardness; it is not a substitute for disinfection or a complete drinking-water purification system.

FAQ

Frequently Asked Questions

Practical answers about CRYSTAL 35L, Upflow technology and household installation.

What is CRYSTAL 35L Clack WS1 UF?

It is a compact, automatic, ion-exchange water softener with 35 litres of resin, a volumetric Clack WS1CI valve and optimized Upflow regeneration.

What does “Upflow” mean?

Upflow describes the direction of brine during resin regeneration. The brine moves from the bottom of the resin bed upward, helping achieve efficient regeneration when the system is properly configured.

Does Upflow regeneration save salt?

The CRYSTAL technical sheet states that its Upflow system is optimized for low salt consumption. It does not provide a verified percentage saving compared with another system.

How much salt is used per regeneration?

The published figure for the 35-litre model is 3.5 kg per regeneration cycle. Actual regeneration frequency depends on hardness, consumption and controller settings.

Does the water softener regenerate automatically?

Yes. Its Clack WS1CI valve provides volumetric control with a digital programmer. Regeneration follows the configured operating logic and measured water consumption.

Is the 35L model suitable for my house?

Possibly, but resin volume alone does not determine suitability. FILTER.CY should assess inlet hardness, peak flow and daily water usage to confirm whether this model is appropriately sized.

Does it remove bacteria or all contaminants?

No. Ion-exchange softening targets hardness ions, primarily calcium and magnesium. It is not a disinfection system and does not replace filtration or other treatment needed for specific contaminants.

Can it be installed on a roof in Cyprus?

Only where a qualified installer confirms suitable environmental protection, plumbing, electrical supply and drainage. The supplied datasheet does not state an outdoor weatherproof rating or maximum ambient temperature.

What does “UF” mean in the product name?

Here, “UF” identifies the Upflow regeneration configuration. It does not mean ultrafiltration.

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