# Expansion Vessel Meibes BASEFLEX 35/1.5, 6 bar for Central Heating

**URL:** https://aio.lv/en/product--meibes-25305--12065180
**Data updated:** 2026-03-12 21:44 (EET)
**Category:** Heating Radiators
**Manufacturer:** Meibes
**Manufacturer code:** 25305
**EAN:** 8712874253056
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 77.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 64.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--meibes-25305--12065180

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Meibes BASEFLEX 35/1.5 is an expansion vessel designed for central heating systems. Rated for 6 bar maximum pressure, it has a 35-litre capacity and a 1.5 bar pre-charge (as indicated in the model name). The unit compensates thermal expansion of heating medium, reduces pressure fluctuations and protects components like boilers and piping. Suitable for residential and light commercial heating installations.

## Long description

Meibes BASEFLEX 35/1.5 is an expansion vessel engineered for central heating systems. With a 35-litre volume and a 1.5 bar factory pre-charge, the unit is rated to withstand system pressures up to 6 bar. The vessel accommodates thermal expansion of the heating medium, helps stabilise system pressure and reduces cycling of pumps and boilers, supporting longer component life and steady operation in residential and light commercial installations.
Advantages
The diaphragm design separates the heating medium from the gas cushion to maintain stable pre-charge and reliable expansion capacity. Compact cylindrical construction allows straightforward mounting in plant rooms or utility spaces. Rated for 6 bar operation, the vessel is suitable for higher-pressure domestic and small commercial circuits where increased expansion volume and pressure control are required. Installation and maintenance are simplified by standard connection options and accessible pre-charge valve.
Suitable for
Domestic central heating systems
Light commercial heating installations
Systems requiring a 35-litre expansion capacity
Circuits with maximum operating pressures up to 6 bar
Key specifications
Nominal volume: 35 litres
Factory pre-charge: 1.5 bar
Maximum allowable pressure: 6 bar
Diaphragm-type separation between gas and fluid
Orientation: vertical (cylindrical) mounting
How to use
Install the expansion vessel on the return line of the heating circuit in a location that allows access to the pre-charge valve for periodic checks. Ensure the system is depressurised and drained as required before making connections. Connect using appropriate fittings and isolate valves to allow service without draining the full system. Verify and adjust the vessel pre-charge to match the static system pressure before commissioning. After installation, pressurise the system and check for leaks and correct pressure behaviour during a controlled heat cycle.
Usage recommendations
Check the pre-charge pressure at least annually and after any maintenance that involves draining the heating circuit. Match the vessel pre-charge to the static pressure of the system to ensure correct expansion compensation. Do not exceed the vessel's rated maximum operating pressure and follow local regulations and manufacturer guidance for safe installation and service.

## FAQ

### How much does the Expansion Vessel Meibes BASEFLEX 35/1.5 6 bar cost, and is it available for purchase?

The price is 77.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 08.07.2026 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 Meibes BASEFLEX 35/1.5 6 bar 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 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/12065180/67550494_large.webp