# Expansion Vessel Meibes BASEFLEX 25/1.5, 6 bar – central heating pressure vessel

**URL:** https://aio.lv/en/product--meibes-25303--12034978
**Data updated:** 2026-03-12 16:43 (EET)
**Category:** Heating Radiators
**Manufacturer:** Meibes
**Manufacturer code:** 25303
**EAN:** 8712874253032
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--meibes-25303--12034978

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Meibes BASEFLEX 25/1.5 is a 6 bar expansion vessel designed for closed central heating systems. With a nominal volume of 25 liters and a precharge pressure of 1.5 bar, it compensates thermal expansion, maintains system pressure and protects components from overpressure. Suitable for residential and light commercial heating circuits and wall- or floor-mounted installations.

## Long description

Meibes BASEFLEX 25/1.5 is a 6 bar expansion vessel designed for closed central heating systems. With a nominal volume of 25 litres and a factory precharge pressure of 1.5 bar, this pressure vessel compensates for thermal expansion in heating circuits, stabilises system pressure and helps protect pumps, valves and boiler components from overpressure. The compact cylinder is suitable for wall- or floor-mounted installation in residential and light commercial heating applications.
Advantages
The expansion vessel provides a stable pressure buffer that reduces the frequency of automatic filling and release cycles in the circuit. Its 6 bar maximum working pressure covers a wide range of modern domestic heating systems. A durable inner bladder separates the system water from the nitrogen precharge, preventing corrosion and maintaining consistent performance over time. The vessel's dimensions and mounting options allow flexible placement near boilers, manifolds or distribution headers.
Suitable for
Closed central heating systems in houses and apartments
Light commercial heating circuits with similar pressure requirements
Wall- or floor-mounted installations near boilers, heat sources or manifolds
Key specifications
Nominal volume: 25 litres
Maximum working pressure: 6 bar
Factory precharge (initial pressure): 1.5 bar
Design: single expansion vessel with internal bladder
Application: closed central heating circuits
How to use
Install the expansion vessel in a dry, accessible location close to the heating system hydraulic centre. Connect the vessel to the system using appropriate fittings and ensure the connection is airtight. Before commissioning, check and adjust the precharge pressure of the vessel when the system is drained or at zero hydraulic pressure; after filling the system, verify that working pressure remains within recommended limits. Periodically inspect the vessel for external damage and verify the precharge pressure using a suitable gauge or pump as part of routine maintenance.
Usage recommendations
Match the vessel size and precharge to the system volume and static pressure before installation. If in doubt, measure system cold fill pressure and calculate required expansion capacity to prevent frequent pressure relief valve activation. Regularly check precharge pressure and external condition during annual servicing to ensure continued protection of system components.

## FAQ

### How much does the Meibes BASEFLEX 25/1.5 expansion vessel cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 44 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 09.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Meibes 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 Meibes 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/12034978/67522335_large.webp