# Expansion Vessel CIMM ERE 18 L for Central Heating, 1.5/3.5 bar, -10 to +100°C

**URL:** https://aio.lv/en/product--cimm-820018--12021025
**Data updated:** 2026-03-11 20:56 (EET)
**Category:** Heating Radiators
**Manufacturer:** CIMM
**Manufacturer code:** 820018
**EAN:** 8033003527467
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 28.92 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--cimm-820018--12021025

## 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

CIMM ERE 18 L diaphragm expansion vessel designed for central heating systems. Capacity 18 litres, operating pressure range 1.5/3.5 bar and temperature range -10 to +100°C. The vessel compensates for thermal expansion of heating medium, prevents overpressure, and stabilizes system pressure in boilers, radiators and closed hydronic loops.

## Long description

The CIMM ERE 18 L diaphragm expansion vessel is designed for central heating systems to absorb thermal expansion of the heating medium and maintain stable pressure in closed hydronic circuits. With an 18-litre capacity and an operating pressure range of 1.5/3.5 bar, this vessel fits typical residential and light commercial boilers and radiator systems. It operates across a wide temperature range from -10 to +100°C, making it suitable for systems subject to seasonal and operational temperature variation.
Advantages
The diaphragm design separates the gas and liquid sections to reduce corrosion and prolong component life while ensuring rapid pressure compensation during temperature changes. Compact cylindrical construction allows flexible installation in boiler rooms or near manifolds. The vessel’s rated pressure range and broad temperature tolerance provide reliable protection against overpressure and frequent pump cycling, contributing to more consistent system performance.
Suitable for
Domestic central heating systems with boilers and radiators
Closed-loop hydronic heating circuits in small commercial installations
Systems requiring a compact expansion vessel with moderate capacity
Applications where temperature variations range from below freezing to high operating temperatures
Key specifications
Capacity: 18 litres
Operating pressure range: 1.5 to 3.5 bar
Temperature range: -10 to +100°C
Diaphragm (membrane) type separating gas and liquid
Compact cylindrical form factor for wall or floor mounting
How to use
Install the expansion vessel on the return line or at a location recommended by the heating system designer, ensuring the vessel’s gas side is accessible for pressure adjustment. Pre-charge the vessel to the required initial pressure matching the static system pressure, then connect using appropriate fittings and support to avoid strain. After installation, perform a system fill and venting procedure to remove air and verify that the vessel compensates for pressure changes during heating and cooling cycles.
Usage recommendations
Check and adjust the pre-charge pressure periodically, especially after prolonged downtime or maintenance. Inspect the vessel and its connections for leaks and corrosion during routine servicing. Select the vessel capacity and pre-charge pressure in accordance with the heating system’s volume and manufacturer guidance to ensure stable operation and prevent excessive cycling.

## FAQ

### How much does the CIMM ERE 18 L Expansion Vessel cost, and is it available for purchase?

The price is 34.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 177 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 CIMM 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 CIMM 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/12021025/67509403_large.webp