
Duplex softeners are ideal for sites with varying water demand or for applications where a continuous and uninterrupted supply of softened water is required. The twin vessel configuration allows for one resin vessel to always be in service whilst the other is in regeneration or standby thus guaranteeing 24/7 soft water production.
The initiation of the regeneration cycle can be controlled by time clock, water quality or volume produced.
- Timer-controlled units tend be work best when daily soft water requirement is relatively constant, the units then being set to regenerate when general consumption low.
- Meter controlled models are ideal when daily water requirements are variable. Having sized the water softener correctly, the regeneration cycle occurs when the set capacity for producing soft water is reached (this is particularly useful when water and salt consumption must be kept to an absolute minimum)
- Where a specific water quality is consistently required, initiation of regeneration by output quality creates a safeguard ensuring that supply to service will always meet production requirements.
Typical applications for this style of water softener would be
- As a pre-treatment to water purification equipment such as Reverse Osmosis
- Large Scale Boiler Feed
Water Softeners are generally very reliable pieces of equipment however a small degree of regular attention is required to ensure that they continue to give good service over a long period.
A supply of appropriately graded high purity softener salt will be required for regular top up in the brine bin (for the production of the brine solution used in the regeneration process).
Available for immediate delivery from AllWater Technologies Ltd, this is most commonly supplied in 25kg bags as a granular or tablet style product.
Routine professional servicing by AllWater Technologies Ltd experienced service team is also strongly recommended, for peace of mind and continued operational performance.
For applications requiring a non-continuous but steady demand for moderate capacities of softened water over the course of a normal working day, please visit our Simplex Water Softener page for further information.
FLECK | FLOW RANGE | CONNECTIONS |
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0.5 – 3.5m³/h | 1″ BSPF |
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0.5 – 3m³/h | 1″ BSPF |
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5.6 – 6.8m³/h | 1½” BSPF |
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4.1 – 18m³/h | 2″ BSPF |
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25 – 42m³/h | 3″ BSPF |
SIATA | FLOW RANGE | CONNECTIONS |
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0.6 – 4.5m³/h | 1″ BSP |
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4 – 8m³/h | 1¼” BSP |
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9 – 18m³/h | 1½” BSP |
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20 – 40m³/h | 2″ / 3″ BSP |



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