# Expansion vessel (wall-mounted) FERRO K5UNI35W 35 L

**URL:** https://aio.lv/en/product--ferro-k5uni35w--11888103
**Data updated:** 2026-03-09 21:11 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** FERRO
**Manufacturer code:** K5UNI35W
**EAN:** 5903738253647
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 130.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 108.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ferro-k5uni35w--11888103

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

FERRO K5UNI35W is a 35-liter wall-mounted expansion vessel designed for closed heating and hot-water systems. It compensates for pressure changes caused by thermal expansion, helps maintain system stability and protects components from overpressure. Suitable for residential and light-commercial installations where a compact, wall-mounted expansion tank is required.

## Long description

FERRO K5UNI35W 35 L is a wall-mounted expansion vessel designed for closed heating and hot-water systems. The 35-liter capacity accommodates thermal expansion in domestic and light-commercial installations, reducing pressure fluctuations and helping to protect boilers, pumps and pipework from overpressure. Its compact format and wall-mounted design enable installation in boiler rooms, utility cupboards or other confined spaces where a small footprint is required.
Advantages
This FERRO expansion vessel provides reliable pressure compensation thanks to a pre-charged gas chamber separated from the hydraulic circuit by a durable diaphragm. The wall-mounted layout minimises floor space usage and simplifies integration with existing systems. Made for closed systems, the vessel helps extend the service life of heating components by limiting peak pressures and reducing the risk of system cycling caused by volume changes.
Suitable for
 Closed central heating systems in single-family homes
 Domestic hot-water systems with space constraints
 Light-commercial installations such as small offices or retail spaces
 Retrofit projects where wall-mounted vessels are preferred
Key specifications
 Nominal volume: 35 litres
 Mounting: wall-mounted design
 Application: closed heating and hot-water systems
 Internal separation: diaphragm-type bladder separating gas and fluid
 Function: absorbs thermal expansion and compensates pressure changes
 Material: corrosion-resistant steel shell with protective coating
 Connection: standard threaded hydraulic connection suitable for typical heating installations
How to use
Install the expansion vessel on a suitably rated wall bracket at a location close to the boiler or primary circulation loop, ensuring the hydraulic connection is accessible for commissioning and maintenance. Before connection, check the pre-charge pressure of the gas chamber and adjust it to match the static system pressure according to the heating system specification. After installation, fill and vent the system, then verify the vessel and system pressures under cold and operating conditions to confirm correct operation.
Usage recommendations
Periodically inspect the vessel for visible damage and verify the gas pre-charge at service intervals. Ensure system pressure settings and safety devices are set per installation guidelines. For replacement or adjustments, follow the heating system manufacturer instructions or consult a qualified heating engineer.

## FAQ

### How much does the Expansion vessel FERRO K5UNI35W 35 L cost, and is it available for purchase?

The price is 130.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 15.07.2026 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. All transactions are 100% secure and encrypted.

### Can Expansion vessel FERRO K5UNI35W 35 L 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 FERRO 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 FERRO 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/11888103/67309261_large.webp