# Comap Airfix E DHW Expansion Vessel 8L, 4.0 bar, 10 bar

**URL:** https://aio.lv/en/product--comap-25240--12479287
**Data updated:** 2026-07-06 17:41 (EEST)
**Category:** Other goods
**Manufacturer:** Comap
**Manufacturer code:** 25240
**EAN:** 8712874252400
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 64.49 €
**Prices and availability valid until:** 2026-10-28 23:59
**Price without VAT (21%):** 53.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--comap-25240--12479287

## 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

The Comap Airfix E DHW expansion vessel is designed for domestic hot water systems. With a capacity of 8 liters and a pre-charge pressure of 4.0 bar, it is rated for a maximum system pressure of 10 bar. This vessel effectively manages pressure fluctuations in water heating installations, ensuring system safety and longevity. Its robust construction makes it a reliable component for maintaining stable pressure in residential hot water circuits.

## Long description

The Comap Airfix E DHW expansion vessel is a high-quality component engineered specifically for domestic hot water systems. With a total capacity of 8 liters, this vessel is designed to absorb the expansion of water caused by temperature changes within a heating circuit, thereby preventing dangerous pressure spikes. It features a pre-charge pressure of 4.0 bar and is built to withstand a maximum system pressure of 10 bar, providing a reliable solution for maintaining the integrity and safety of residential plumbing installations.
Advantages
The primary benefit of the Comap Airfix E is its ability to protect the water heating system from excessive pressure, which significantly extends the lifespan of pipes, valves, and water heaters. By managing thermal expansion effectively, it prevents the frequent opening of safety relief valves, which reduces unnecessary water waste. The robust construction ensures long-term durability and consistent performance under varying operational conditions, making it an essential addition to any modern domestic hot water setup.
Suitable for
Domestic hot water storage tanks
Residential water heating systems
Systems requiring stable pressure management
Installations where thermal expansion needs to be controlled
This expansion vessel may not be suitable for large-scale commercial or industrial heating systems that exceed its 8-liter capacity or require different pressure ratings. It is also not intended for use in closed-loop central heating systems that utilize glycol or other chemical additives, as it is specifically optimized for potable domestic hot water.
Key specifications
Capacity: 8 liters
Pre-charge pressure: 4.0 bar
Maximum system pressure: 10 bar
Application: Domestic hot water systems
Installation should be performed by a qualified professional to ensure the vessel is correctly integrated into the existing plumbing circuit. The vessel is typically installed on the cold water supply line leading to the water heater. It is important to ensure that the pre-charge pressure is checked and adjusted according to the specific requirements of the installation site before the system is pressurized.
What to consider before purchase
Verify that the 8-liter capacity is sufficient for your specific water heater volume
Ensure the 4.0 bar pre-charge pressure matches your system requirements
Check available space for installation near the water heater
Confirm compatibility with your local potable water regulations
For optimal performance and safety, it is recommended to inspect the expansion vessel annually to ensure the pre-charge pressure remains within the specified range and that the diaphragm is functioning correctly.

## FAQ

### How much does the Comap Airfix E DHW 8L Expansion Vessel cost, and is it available for purchase?

The price is 64.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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/12479287/70206341_large.webp