# Water softener VIESSMANN AquaStilla Duo (water treatment device, model 7710548)

**URL:** https://aio.lv/en/product--viessmann-7710548--12041824
**Data updated:** 2026-03-12 19:23 (EET)
**Category:** Water Filters
**Manufacturer:** VIESSMANN
**Manufacturer code:** 7710548
**EAN:** 5903624953651
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 838.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 693.38 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--viessmann-7710548--12041824

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

VIESSMANN AquaStilla Duo is a water softener designed for domestic water treatment. The unit reduces water hardness by ion exchange to protect plumbing, appliances and heating systems from scale buildup. Supplied under model 7710548, it is suitable for household use where softened water is required for longer appliance life, improved soap performance and reduced maintenance.

## Long description

VIESSMANN AquaStilla Duo is a domestic water softener that reduces water hardness through ion exchange to protect pipes, household appliances and heating systems from scale buildup. The unit is designed for installation on the mains supply to supply softened water to a household, improving detergent performance, reducing lime deposits and helping to extend the service life of water-using equipment.
Advantages
The AquaStilla Duo provides continuous reduction of calcium and magnesium ions using a dual-stage softening process to maintain consistent water quality for everyday household use. Its compact design suits installation near the incoming cold water line and is engineered to integrate with typical domestic plumbing. By lowering hardness levels, the device reduces descaling frequency for boilers, washing machines and kettles while improving soap and detergent efficiency, which can lower cleaning product consumption and maintenance needs.
Suitable for
 Households with hard water supply that need to protect plumbing and appliances
 Homes aiming to reduce limescale formation in boilers, water heaters and kettles
 Families that want improved soap and detergent performance for laundry and cleaning
 Properties seeking to lower maintenance frequency for heating and hot-water systems
Key specifications
 Function: ion-exchange water softening for domestic use
 Application: whole-house connection at mains cold water inlet
 Operation: dual-stage softening cycle for continuous softened water supply
 Primary benefit: reduction of scale-forming minerals (calcium, magnesium)
 Design: compact unit suitable for standard household plumbing installation
How to use
Install the AquaStilla Duo on the incoming cold water main according to local installation rules and manufacturer instructions; a qualified plumber should complete the connection and commissioning. After installation, the unit operates automatically to exchange hardness ions and supply softened water to the connected fixtures. Periodic checks are required to monitor resin condition and salt or regenerant levels if applicable; follow the manufacturer's maintenance schedule for regeneration cycles and component inspection to ensure continued performance.
Usage recommendations
For optimal results, verify incoming water hardness before installation and set up the AquaStilla Duo capacity and regeneration settings to match household consumption. Use recommended regenerant materials and perform scheduled maintenance inspections. In systems with existing water treatment (filtration, sediment pre-filters), place the softener after coarse filtration to protect the resin and extend service intervals.

## FAQ

### How much does the Water softener VIESSMANN AquaStilla Duo 7710548 cost, and is it available for purchase?

The price is 838.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 124 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Water softener VIESSMANN AquaStilla Duo 7710548 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All VIESSMANN products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized VIESSMANN service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12041824/67528856_large.webp