# Expansion Vessel Meibes BASEFLEX 18/1.5 6 bar for Central Heating (25302)

**URL:** https://aio.lv/en/product--meibes-25302--12038690
**Data updated:** 2026-03-12 16:47 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Meibes
**Manufacturer code:** 25302
**EAN:** 8712874253025
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 48.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 40.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--meibes-25302--12038690

## 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

Meibes BASEFLEX 18/1.5 is an expansion vessel designed for central heating systems. Rated for 6 bar maximum pressure, it has an 18 l effective capacity and a 1.5 bar pre-charge (as indicated in the model name). The vessel compensates thermal expansion of heating water, protects system components and maintains stable pressure. Suitable for residential and small commercial heating installations.

## Long description

Meibes BASEFLEX 18/1.5 is an expansion vessel for central heating systems with an 18 litre effective capacity and a factory pre-charge of 1.5 bar. Engineered to compensate for thermal expansion of heating water up to a maximum system pressure of 6 bar, this vessel helps maintain stable pressure, reduces stress on pumps and valves, and protects the heating circuit from overpressure cycles. It is designed for residential and small commercial installations where a compact, reliable membrane-type expansion vessel is required.
Advantages
The vessel provides reliable pressure stabilization and thermal expansion compensation without mechanical complexity. Its rated 6 bar maximum pressure and 18 l capacity suit a wide range of domestic and light-commercial heating circuits. The integrated pre-charge eases initial commissioning and reduces the need for immediate adjustment. The membrane design separates the water and gas sides to prevent corrosion and preserve performance over time.
Suitable for
Residential central heating systems
Small commercial heating circuits
Systems requiring an 18 l expansion volume and 1.5 bar pre-charge
Replacement of existing membrane expansion vessels of similar size
Key specifications
Effective volume: 18 litres
Factory pre-charge pressure: 1.5 bar
Maximum allowable system pressure: 6 bar
Membrane-style separation between water and gas chamber
Compact cylindrical design suitable for wall- or floor-mounted installation near the boiler or accumulator
How to use
Install the expansion vessel on the system’s filling or return line according to the hydraulic layout and local regulations. Ensure the vessel pre-charge matches the static pressure of the installation when the system is cold; adjust the pre-charge if required before connecting to the system. Securely mount the vessel, connect using appropriate fittings and isolation valves, and perform a leak test. After filling and venting the heating circuit, verify operating pressure remains within the allowed range during heating cycles and re-check the pre-charge periodically.
Usage recommendations
Check pre-charge pressure before installation and during routine maintenance, ensure compatibility with system maximum pressure and fluid type, and follow local codes for mounting and pressure-relief arrangements.

## FAQ

### How much does the Meibes BASEFLEX 18/1.5 expansion vessel 6 bar cost, and is it available for purchase?

The price is 48.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 29 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. 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/12038690/67525950_large.webp