# Diaphragm pressure expansion vessel Reflex S 18, white, 10 bar

**URL:** https://aio.lv/en/product--reflex-4036705032240--11286680
**Data updated:** 2026-03-11 12:03 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Reflex
**Manufacturer code:** 4036705032240
**EAN:** 4036705032240
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 79.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 66.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--reflex-4036705032240--11286680

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Diaphragm pressure expansion vessel Reflex S 18 is a compact closed expansion vessel with an internal diaphragm, rated for 10 bar and finished in white. Designed to accommodate thermal expansion and maintain system pressure in heating and hot-water circuits, it is suitable for residential and light commercial installations where a small-volume expansion vessel is required.

## Long description

Diaphragm pressure expansion vessel Reflex S 18, white, 10 bar is a compact closed expansion vessel with an internal diaphragm, designed to absorb thermal expansion and maintain stable pressure in heating and hot-water circuits. The vessel is finished in white and rated for up to 10 bar operating pressure, making it suitable for residential and light commercial installations where space is limited and a small-volume expansion vessel is required.
Advantages
The internal diaphragm separates the fluid circuit from the pre-charged gas cushion, preventing direct contact and reducing corrosion risk. Its compact design allows installation in confined spaces such as boiler rooms, under sinks, or inside service cupboards. The 10 bar pressure rating ensures compatibility with a wide range of closed heating systems and hot-water circuits. The white finish provides a neutral appearance that integrates into most utility spaces.
Suitable for
 Residential central heating systems with limited installation space
 Small domestic hot-water circuits
 Light commercial heating applications where a compact expansion vessel is required
 Equipment rooms, boiler enclosures, and service cabinets
Key specifications
 Type: Closed diaphragm expansion vessel with internal membrane
 Nominal volume: approximately 18 litres
 Maximum operating pressure: 10 bar
 Color/finish: white
 Connection: standard screw or threaded connection compatible with heating system fittings
 Application: heating and hot-water circuits
How to use
Install the expansion vessel according to the system design and local plumbing codes, ensuring the connection is compatible with the heating circuit. Mount the vessel in a location that allows access for inspection and maintenance while protecting it from freezing and mechanical damage. Pre-charge the gas side to the required pressure for the system (typically matching the system cold-fill pressure) and check the diaphragm integrity before commissioning. After installation, pressurize the heating system slowly and verify that the vessel accepts thermal expansion and stabilizes system pressure during heat-up and cool-down cycles.
Usage recommendations
Regularly check the pre-charge pressure and visual condition of the vessel as part of routine system maintenance. Replace the expansion vessel if the diaphragm shows signs of failure or if the vessel no longer maintains system pressure. Ensure installation and service are carried out by qualified personnel familiar with closed heating systems.

## FAQ

### How much does the Reflex S 18 diaphragm expansion vessel 10 bar cost, and is it available for purchase?

The price is 79.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 14.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Reflex S 18 diaphragm expansion vessel 10 bar 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 Reflex 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 Reflex 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/11286680/68516915_large.webp