# Expansion vessel VAREM R1018228, 18 L capacity, for heating and potable systems

**URL:** https://aio.lv/en/product--varem-r1018223s40a2000--9517572
**Data updated:** 2026-03-12 16:26 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** VAREM
**Manufacturer code:** R1018223S40A2000
**EAN:** 8034108701820
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 28.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 23.96 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--varem-r1018223s40a2000--9517572

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

VAREM expansion vessel R1018228 with 18 L nominal capacity designed to accommodate thermal expansion in closed heating and potable water systems. The vessel separates air and water via an internal membrane, reduces pressure fluctuations, and protects pumps and piping from overpressure. Suitable for domestic boiler systems, heat pumps and solar thermal installations requiring a compact expansion tank.

## Long description

VAREM expansion vessel R1018228 with 18 L nominal capacity is designed to control thermal expansion and pressure fluctuations in closed heating and potable water systems. The tank uses an internal elastomeric membrane to separate the air cushion from the water side, maintaining constant operating pressure and reducing the frequency of pump cycling. Its compact form factor makes it suitable for installations where space is limited while providing protection for boilers, heat pumps, solar thermal circuits and piping against overpressure and hydraulic shocks.
Advantages
The diaphragm design prevents mixing of air and water, ensuring reliable pressure maintenance and reducing corrosion risk. An 18 L working volume provides sufficient buffering for small to medium domestic systems. The compact construction and standardized connections allow for straightforward integration into existing heating or potable water circuits. Materials and design focus on durability and stable performance under typical domestic operating conditions.
Suitable for
Domestic boiler heating systems
Heat pump installations
Solar thermal systems
Small closed potable water circuits requiring pressure buffering
Key specifications
Nominal capacity: 18 litres
Internal diaphragm separates air and water
Compact tank body suitable for space-constrained installations
Designed for closed heating and potable water systems
Reduces pressure fluctuations and pump cycling
How to use
Install the expansion vessel on the system return line or as recommended by the system designer, ensuring the vessel is positioned vertically for correct diaphragm operation. Pre-charge the air side to the recommended pressure for the installation, typically matching the static system pressure, and verify tight connections before commissioning. During routine system checks, confirm the pre-charge pressure, inspect for visible leaks and ensure the vessel remains free of external damage. Follow local codes and the system manufacturer's instructions when integrating the vessel into potable water loops.
Usage recommendations
Verify pre-charge pressure before installation and adjust to match system static pressure. Periodically check the vessel during scheduled maintenance to maintain correct pre-charge and detect any loss of diaphragm integrity. For potable water applications, follow hygiene and backflow prevention guidelines when connecting the vessel.
Keywords: VAREM expansion vessel R1018228 18 L expansion tank heating potable systems diaphragm compact

## FAQ

### How much does the Expansion vessel VAREM R1018228 18 L cost, and is it available for purchase?

The price is 28.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 320 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 01.07.2026 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 VAREM 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 VAREM 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/9517572/52226524_large.webp