# Expansion Vessel Comap Solarix 25/2.5 (10 bar) for Solar and Heating Systems

**URL:** https://aio.lv/en/product--comap-25823--12376673
**Data updated:** 2026-04-26 20:48 (EEST)
**Category:** Other goods
**Manufacturer:** Comap
**Manufacturer code:** 25823
**EAN:** 8712874258235
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 65.99 €
**Prices and availability valid until:** 2026-10-26 23:59
**Price without VAT (21%):** 54.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--comap-25823--12376673

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.10.2026 | free |
| Pickup points | 15.10.2026 | 1.99 EUR |
| Courier delivery to door | 15.10.2026 | 4.99 EUR |

## Summary description

Comap Solarix expansion vessel 25/2.5 (10 bar) is designed for closed solar and heating circuits. The diaphragm-type vessel compensates for thermal expansion, maintaining system pressure and protecting components from overpressure. Suitable for domestic and small commercial installations where a 25-litre capacity and 2.5 bar pre-charge are required.

## Long description

Comap Solarix 25/2.5 (10 bar) is a diaphragm expansion vessel designed for closed solar and heating systems. With a nominal volume of 25 litres and a factory pre-charge of 2.5 bar, the vessel absorbs thermal expansion of the heat transfer fluid, stabilises system pressure and reduces the risk of overpressure events. Constructed for domestic and small commercial installations, this unit is suitable for solar thermal loops and hydronic heating circuits where a compact, diaphragm-type buffer is required.
Advantages
The diaphragm design separates the compressible gas chamber from the liquid side to prevent gas absorption and prolong membrane life. A 10 bar maximum allowable working pressure provides a safety margin for higher-pressure heating or solar systems. The vessel’s 25-litre capacity balances space efficiency with sufficient expansion volume for typical small installations. Durable construction and standard connection options make the unit compatible with common system layouts.
Suitable for
Closed solar thermal systems (domestic hot water and solar collectors)
Hydronic heating systems in single-family homes
Small commercial heating circuits requiring a 25 L expansion volume
Systems where a 2.5 bar pre-charge is appropriate for pump head and static pressure
When it may not be suitable
This expansion vessel is not intended for open systems or potable water expansion applications where direct potable water contact is required. Systems that need a larger expansion volume, a different pre-charge pressure, or an alternative maximum working pressure should select a vessel sized and rated specifically for those conditions.
Key specifications
Type: Diaphragm (membrane) expansion vessel
Nominal volume: 25 litres
Factory pre-charge pressure: 2.5 bar
Maximum allowable working pressure: 10 bar
Application: Closed solar and hydronic heating circuits
How to use
Install the expansion vessel on the pressure side of the system, typically near the boiler, pump or solar station, using the appropriate shut-off and isolation valves. Verify and adjust the pre-charge pressure with the vessel isolated and drained from the system if necessary; the correct pre-charge equals the static system pressure at the vessel location. Position the vessel upright and secure it to prevent movement. Periodically check the pre-charge and inspect the vessel for leaks or visible damage as part of routine system maintenance.
What to consider before purchase
Confirm the required expansion volume for your system based on total fluid volume and maximum temperature rise
Ensure the factory pre-charge (2.5 bar) matches or can be adjusted to your system static pressure
Verify compatibility with system maximum pressure; this vessel is rated to 10 bar
Check physical dimensions and mounting requirements to ensure fit in available space
Usage recommendations
For reliable operation, set the vessel pre-charge to match the system’s static pressure and re-check it after commissioning and periodically during service. Use isolation valves and a pressure gauge nearby to facilitate maintenance. Replace the vessel if the diaphragm shows signs of failure, loss of pre-charge that cannot be restored, or visible corrosion.

## FAQ

### How much does the Comap Solarix 25/2.5 Expansion Vessel (10 bar) cost, and is it available for purchase?

The price is 65.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 12.10.2026 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 Comap 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 Comap 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/12376673/69821375_large.webp