# Expansion vessel Comap SOLARIX 18/2.5, capacity 18 L, precharge 2.5 bar, max 10 bar

**URL:** https://aio.lv/en/product--comap-25822--12028418
**Data updated:** 2026-03-12 16:37 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Comap
**Manufacturer code:** 25822
**EAN:** 8712874258228
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 67.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 56.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--comap-25822--12028418

## 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

Comap SOLARIX 18/2.5 is an 18-litre expansion vessel designed for closed heating and solar systems. It features a factory precharge of 2.5 bar and a maximum operating pressure of 10 bar. The diaphragm-type vessel compensates for thermal expansion of system fluid, protects against overpressure and reduces cycling of pumps and valves. Suitable for domestic and small commercial installations.

## Long description

Comap SOLARIX 18/2.5 is an 18-litre diaphragm expansion vessel designed for closed heating and solar systems. The vessel has a factory precharge of 2.5 bar and a maximum allowable working pressure of 10 bar. It absorbs thermal expansion of the system fluid, reduces pressure spikes and helps stabilise operation by limiting on/off cycling of pumps and valves in domestic and small commercial installations.
Advantages
The diaphragm construction separates air and liquid, preventing gas absorption into the system and maintaining consistent performance over time. The factory precharge of 2.5 bar allows for immediate installation in systems with corresponding static pressure, while the 10 bar maximum pressure rating ensures compatibility with a wide range of closed heating and solar circuits. Its compact 18 L capacity offers a balance between effective expansion compensation and space efficiency.
Suitable for
 Domestic central heating systems
 Roof-mounted and drainback solar thermal circuits
 Small commercial heating installations
 Boiler and heat pump systems requiring closed-loop expansion control
Key specifications
 Capacity: 18 litres
 Factory precharge pressure: 2.5 bar
 Maximum allowable pressure: 10 bar
 Diaphragm (membrane) type vessel
 Designed for closed heating and solar systems
 Compact cylindrical form factor suitable for wall or floor mounting
How to use
Install the expansion vessel in a position where it is accessible for inspection and maintenance, typically near the system pump or manifold. Before connection, verify that the system’s static pressure matches the vessel precharge or adjust the vessel precharge as required using a suitable pressure gauge and pump. Connect to the system using appropriate fittings and ensure all connections are tightened and leak-free. After filling and venting the system, confirm that the operating pressure remains within the acceptable range and that the vessel accommodates normal thermal expansion without excessive cycling of system components.
Usage recommendations
For reliable long-term performance, check the vessel precharge annually and after major servicing or system draining. Ensure compatibility with system fluid (antifreeze or glycol mixes) and follow manufacturer guidance on minimum installation clearances and mounting orientation.

## FAQ

### How much does the Expansion vessel Comap SOLARIX 18/2.5 cost, and is it available for purchase?

The price is 67.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 47 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. 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/12028418/67516299_large.webp