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ALFILTRA DUPLEX-PRO 1.25" Water Softener

 (2)
pro-enthaertungsanlagen pro-enthaertungsanlagen
filtrasoft-duplex-pro-r_ckansicht_1 filtrasoft-duplex-pro-r_ckansicht_1
filtrasoft-duplex-pro-steuerverntile_1 filtrasoft-duplex-pro-steuerverntile_1
Duplex-Pro-500-water-softening-system-commercial-operation Duplex-Pro-500-water-softening-system-commercial-operation
made-in-germanypremium-quality
€2,649.00
incl. VAT excl. shipping costs
  Available - Delivery between 4/21/26 and 4/23/26
  • ✓Soft water around the clock: Ensure an uninterrupted supply even during peak consumption. The fully automatic two-column system delivers a continuous supply of soft water without interruption – even during regeneration.
  • ✓Full water pressure for large buildings: Avoid pressure drops in apartment buildings or commercial properties. The extra-large 1.25-inch water connection and separate salt container easily handle the highest demands and water volumes.
  • ✓Maximum efficiency at minimum costs: Save real money in ongoing operations. The intelligent, water-volume-controlled regeneration and the smart Eco-Inject system ensure optimal utilization of the high-performance resin.

Performance class (capacity)

The capacity depends on your water hardness and water consumption. You can determine the capacity using our capacity calculator or this rule of thumb:

Water hardness rule of thumb
Medium-hard water (8–14 °dH) Number of people x 7.5
Hard water (14–21 °dH) Number of people x 10
Very hard water (over 21 °dH) Number of people x 12.5

Example (4 people with a water hardness of 20): 4 x 10 = 40

Sizing a water softener
180
240
300
400
500
600
700

Often bought together

Advice

Your advantages only with us

  • Excellent expertise for 20 years
  • Highest quality in every component
  • fair price-performance ratio
  • in-house, trained fitters
  • no risk through purchase on account (from 500 €)
  • Free shipping in Germany (from 250 €)
Advice

Contact
You can reach our customer service from Monday to Thursday from 9 a.m. to 5 p.m. and Friday from 9 a.m. to 3 p.m.

DUPLEX-PRO 1.25" Water Softener

  • ✓Soft water around the clock: Ensure an uninterrupted supply even during peak consumption. The fully automatic two-column system delivers a continuous supply of soft water without interruption – even during regeneration.
  • ✓Full water pressure for large buildings: Avoid pressure drops in apartment buildings or commercial properties. The extra-large 1.25-inch water connection and separate salt container easily handle the highest demands and water volumes.
  • ✓Maximum efficiency at minimum costs: Save real money in ongoing operations. The intelligent, water-volume-controlled regeneration and the smart Eco-Inject system ensure optimal utilization of the high-performance resin.
  • ✓Uncompromising safety: Protect your property reliably. The premium fiberglass-reinforced pressure tanks withstand up to 16 bar, while the safety float valve consistently prevents the salt container from overflowing.
  • ✓Low-maintenance industrial quality: Rely on professional technology that simply works. With two proven CLACK control valves and robust piping, this system is built for continuous professional use.

Duplex Pro water softener with CLACK control valve and 1.25" water connection

Fully automatic, twin-column water softener with separate salt tank, ideal for large water volumes and demanding applications. The two electronic, water meter-controlled Clack WS1 Cl control valves regulate the system completely automatically.

The highlights:

  • 1.25" water connection
  • Safety float valve to protect against overflowing of the salt container
  • Fiberglass-reinforced high-quality pressure tanks up to 16 bar
  • Eco-Inject system for optimal capacity utilization
  • High-performance ion exchange resin, please select the maximum capacity per column above.
  • Optimal utilization of plant capacity without regeneration interruption

Technical details:

  • Power supply: 230 V, 50 Hz, 15 W
  • Water connection: 1.25"
  • Operating pressure 2.2 - 8 bar
  • Operating temperature 5-40 °C

Scope of delivery: complete 2-column water softening system consisting of:

  • 2 pressure tanks with high-performance ion exchange resin for self-filling
  • 2 Clack WS1.25 control valves and 3-way motor valve
  • PVC piping
  • Support gravel for optimal resin yield
  • Salt container with safety float
  • without connection parts (see accessories) and without drain hose.

Please note that the image may differ from the actual appearance of the system. Depending on the capacity, larger pressure tanks may be used. Please refer to the technical data sheet for exact dimensions.

Note: This system was renamed from FILTRASOFT Duplex-Pro to ALFILTRA Duplex-Pro in May 2020. The system itself remains unchanged.

Installation and maintenance service for water softening systems

Alfiltra assembly team

Upon request, we will install your water softener in your apartment building for a fixed price anywhere in Germany. Thanks to our four locations, we can offer the installation service, including travel, at a competitive fixed price.

Here's how it works:

  • You can order the desired system including installation service in our online shop, by phone or by email.
  • To clear up any potential uncertainties, please send us a few photos of the installation location beforehand.
  • We will contact you by phone to arrange an appointment.
  • Our technician will professionally install the system at your location or in your building.

The Alfiltra quality promise

Highest quality

  • Our systems are made in Germany from our own production.
  • Carefully selected materials for durability and reliability
  • Up to 7 years warranty on selected systems with annual maintenance

Maximum safety

  • Pay conveniently and securely by invoice, without financial risk.
  • Positive customer reviews confirm the high level of satisfaction.
  • Quick and uncomplicated help should anything not be to your satisfaction

Competent team

  • Available throughout Germany for fast and competent service
  • Four locations guarantee personal support and fast response times.
  • If you have any questions or concerns, our support team is always available to help.

Installation and maintenance service for water softening systems

Alfiltra assembly team

If you wish, we can install your water softener at a fixed price within Germany. Thanks to our 4 locations, we can offer the installation service including travel at a reasonable fixed price.

This is how it works:

  • You order the desired system including installation service in our online shop, by phone or by email
  • To eliminate any possible ambiguities, please send us a few photos of the installation location in advance
  • We will contact you by phone to arrange an appointment
  • Our technician will professionally install the system for you

 5.0 from 5 Stars (2 Reviews)

5 Stars (2)
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2 Stars (0)
1 Star (0)

Customer Photos

Duplex-Pro-500-water-softening-system-commercial-operation

Latest Reviews

5.00
Dirk H.
May 14, 2023
Variant: Duplex-Pro 180 WS1.25-TWIN Enthärtungsanlage
good installation, good function and friendly, competent staff...
good installation, good function and friendly competent staff
0 people found this review helpful
5.00
Andreas Z.
Jul 7, 2017
Variant: Duplex-Pro 300 WS1.25-TWIN Enthärtungsanlage
very good
0 people found this review helpful
show all Reviews

Technical specifications

Downloads

Assembly & operating instructions Duplex-Pro softening system (0.65 MB)
Technical data Duplex-Pro softening systems (0.20 MB)
Water softening general brochure (0.14 MB)

Often bought together

Salt for ion exchange systems

This water treatment system works with the ion exchange process. This means that salt is required to operate. How much salt the system needs depends on the water consumption and water hardness. You can calculate your salt consumption using our online calculator.

Salt tablets for water softeners and ion exchangers, 5 x 25 kg bags
Salt tablets for water softeners and ion exchangers, 5 x 25 kg bags
€74.00
€74.00 (€0.59 / kg)
incl. VAT excl. shipping costs
  Available

Installation fee for Duplex Pro and Pro-Plus systems

Installation fee for duplex systems up to Duplex 80
Installation fee for duplex systems up to Duplex 80
€690.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Installation fee for duplex systems up to duplex 180
Installation fee for duplex systems up to duplex 180
€750.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Installation fee for duplex systems up to Duplex 300
Installation fee for duplex systems up to Duplex 300
€900.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Installation fee for duplex systems up to Duplex 500
Installation fee for duplex systems up to Duplex 500
€1,400.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Installation fee for duplex systems up to 1000
Installation fee for duplex systems up to 1000
€1,990.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Installation fee for duplex systems up to Duplex 2000
Installation fee for duplex systems up to Duplex 2000
€2,600.00
as of â‚¬690.00
incl. VAT excl. shipping costs
  Available
configure

Resin cleaning and disinfection for ion exchangers

This special solution of preservative and demineralized water ensures that the resin of your ion exchanger is refreshed. Use once a year or after the system has been shut down for a long time.

RESIN CLEAN resin cleaner for water softeners 1000 ml
RESIN CLEAN resin cleaner for water softeners 1000 ml
€19.90
€19.90 (€19.90 / l)
incl. VAT excl. shipping costs
  Available

RESIN CLEAN resin cleaner for water softeners 5000ml
RESIN CLEAN resin cleaner for water softeners 5000ml
€89.00
€89.00 (€17.80 / l)
incl. VAT excl. shipping costs
  Available

Salt for ion exchangers (large quantities)

You can use our online calculator to calculate your salt consumption .

30 bags of 25 kg each of special salt for ion exchangers (1 pallet)
30 bags of 25 kg each of special salt for ion exchangers (1 pallet)
€379.00
€379.00 (€0.51 / kg)
incl. VAT excl. shipping costs
  Available

Connection sets in 1.25"

Connection set Duplex-Pro 1.25'' with intersection (100 cm hoses)
Connection set Duplex-Pro 1.25'' with intersection (100 cm hoses)
€379.00
€379.00
incl. VAT excl. shipping costs
  Available

Connection set Duplex-Pro 1.25'' with intersection (150 cm hoses)
Connection set Duplex-Pro 1.25'' with intersection (150 cm hoses)
€419.00
€419.00
incl. VAT excl. shipping costs
  Available

Connection set Duplex-Pro 1.25'' with intersection (200 cm hoses)
Connection set Duplex-Pro 1.25'' with intersection (200 cm hoses)
€449.00
€449.00
incl. VAT excl. shipping costs
  Available