# Expansion/Pressure Vessel Reflex DE 18L (domestic hot water) model 7303013

**URL:** https://aio.lv/en/product--reflex-7303013--12052419
**Data updated:** 2026-03-12 19:35 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Reflex
**Manufacturer code:** 7303013
**EAN:** 4036705099151
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 76.99 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 63.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--reflex-7303013--12052419

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Reflex DE 18L is a diaphragm expansion/pressure vessel designed for domestic hot water (c.w.u) systems. With an 18-litre nominal volume it accommodates thermal expansion, maintains system pressure and protects against overpressure. Suitable for installation in residential hot water installations where hydraulic buffering and pressure stabilization are required.

## Long description

Reflex DE 18L (domestic hot water) model 7303013 is a diaphragm expansion and pressure vessel designed for closed domestic hot water systems. With an 18-litre nominal volume, the vessel absorbs thermal expansion from heating of potable water, helps maintain steady system pressure and reduces cycling of pumps and valves. The compact steel body with internal elastomer diaphragm separates the water circuit from the pre-charged gas cushion, providing reliable pressure compensation and protection against overpressure in domestic hot water applications.
Advantages
The Reflex DE 18L offers stable pressure control and hydraulic buffering in domestic hot water installations without introducing contaminants into the potable water circuit thanks to its diaphragm separation. Its 18-litre capacity is suited to typical residential systems, limiting pressure peaks and reducing wear on fittings and pumps. Constructed for corrosion resistance and long service life, the vessel requires minimal maintenance and is compatible with standard connection sizes used in domestic installations.
Suitable for
 Residential domestic hot water systems requiring thermal expansion compensation
 Hydraulic buffering and pressure stabilization in single- or multi-point potable water circuits
 Installations aiming to reduce pump cycling and protect valves and fittings
Key specifications
 Nominal volume: 18 litres
 Type: Diaphragm expansion/pressure vessel for domestic hot water
 Internal separation: Elastomer diaphragm separating water and gas chamber
 Function: Absorbs thermal expansion, maintains system pressure, prevents overpressure
 Materials: Steel pressure shell with internal elastomer diaphragm
 Mounting: Fixed standing or bracket-mounted installation typical for domestic plant rooms
How to use
Install the Reflex DE 18L in the cold-water return line or close to the hot-water supply circuit where thermal expansion occurs, following local regulations and installation practices. Ensure the vessel is mounted on a stable base or secured with appropriate brackets, with piping designed to minimize strain on connections. Before commissioning, check and set the pre-charge gas pressure in the vessel to correspond with the static system pressure, then fill and vent the potable water circuit. Perform leak checks and confirm that the vessel accepts expansion during system heat-up.
Usage recommendations
Verify compatibility of operating and maximum allowable temperatures and pressures with the domestic hot water system. Periodically inspect connections and verify the pre-charge pressure, especially after major maintenance. For safe and reliable operation follow local plumbing codes and manufacturer installation guidelines.

## FAQ

### How much does the Reflex DE 18L expansion vessel 7303013 cost, and is it available for purchase?

The price is 76.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 139 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 03.07.2026 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 DE 18L expansion vessel 7303013 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/12052419/67538512_large.webp