# Expansion Vessel METALBET NM IZOL 20 — 20 L with Polyethylene Foam Insulation

**URL:** https://aio.lv/en/product--metalbet-nm-izol-20--12031841
**Data updated:** 2026-03-20 09:50 (EET)
**Category:** Heating Radiators
**Manufacturer:** METALBET
**Manufacturer code:** NM IZOL 20
**EAN:** 5904401345393
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 79.49 €
**Prices and availability valid until:** 2026-08-22 23:59
**Price without VAT (21%):** 65.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--metalbet-nm-izol-20--12031841

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.08.2026 | free |
| Pickup points | 11.08.2026 | 1.79 EUR |
| Courier delivery to door | 11.08.2026 | 4.99 EUR |

## Summary description

METALBET NM IZOL 20 is a 20-liter expansion vessel designed for closed heating and hot-water systems. It features integrated polyethylene foam insulation to reduce heat loss and condensation. The vessel compensates for pressure changes in the system, protects against overpressure, and stabilizes hydraulic operation. Suitable for residential and light commercial heating installations.

## Long description

METALBET NM IZOL 20 is a 20-liter expansion vessel designed for closed heating and hot-water systems. The vessel integrates a durable bladder and a reinforced steel shell with polyethylene foam insulation to reduce heat loss and limit surface condensation. It compensates for thermal expansion of the heating medium, maintains stable pressure levels and protects the system from pressure spikes, supporting safe and efficient operation in residential and light commercial installations.
Advantages
The integrated polyethylene foam insulation reduces energy losses and helps prevent condensation on the vessel surface, improving thermal efficiency without adding external cladding. The unit’s compact 20-liter capacity and robust steel construction allow easy installation in technical rooms with limited space while providing reliable pressure compensation. The bladder design separates the gas and liquid, ensuring consistent pre-charge retention and reducing maintenance frequency. Corrosion-resistant finishing extends service life in typical heating environments.
Suitable for
Closed central heating systems in single-family homes
Hot-water circulation systems in small apartment buildings
Light commercial heating installations with limited installation space
Boiler rooms requiring compact pressure compensation
Key specifications
Nominal volume: 20 liters
Application: closed heating and domestic hot-water systems
Insulation: integrated polyethylene foam insulation to reduce heat loss and condensation
Shell material: steel with protective finish
Internal separator: flexible bladder design to separate gas and liquid
Working function: compensates thermal expansion and stabilizes system pressure
How to use
Install the expansion vessel on a suitable pipe connection point in the return line or as recommended by the system designer, ensuring the unit is mounted vertically and securely. Verify the vessel pre-charge pressure with a suitable gauge and adjust to match the system static pressure before filling the system. After installation, fill and vent the heating system, then re-check system pressure and the vessel pre-charge. Follow local codes and the system manufacturer’s guidance for safe commissioning.
Usage recommendations
Regularly inspect the vessel for external damage, verify pre-charge pressure annually, and check for signs of leakage or corrosion. Maintain system water quality and proper expansion vessel pre-charge to ensure reliable operation and extended service life.

## FAQ

### How much does the Expansion Vessel METALBET NM IZOL 20 — 20 L cost, and is it available for purchase?

The price is 79.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 75 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 06.08.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Expansion Vessel METALBET NM IZOL 20 — 20 L be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 METALBET 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 METALBET 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/12031841/67519413_large.webp