# Expansion vessel Reflex DD 33, 10 bar, 33 liters, green, max temperature 70°C

**URL:** https://aio.lv/en/product--reflex-7380700--12254836
**Data updated:** 2026-05-11 18:13 (EEST)
**Category:** Heating Radiators
**Manufacturer:** Reflex
**Manufacturer code:** 7380700
**EAN:** 4036705057779
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Reflex DD 33 is a 33-liter diaphragm expansion vessel for closed heating and hot-water systems. It is rated for 10 bar maximum working pressure and up to 70°C operating temperature. The green-bodied vessel features an internal diaphragm to absorb volume changes, helps maintain system pressure, reduces pump cycling, and protects components from overpressure.

## Long description

The Reflex DD 33 is a high-quality diaphragm expansion vessel designed specifically for closed heating and potable water systems. With a capacity of 33 liters, this vessel is engineered to manage volume fluctuations caused by temperature changes, ensuring the stability of your system's pressure. Its robust construction and reliable internal diaphragm make it an essential component for maintaining the longevity and efficiency of water-based installations.
Advantages
This expansion vessel offers exceptional durability and performance due to its specialized design for potable water applications. The internal diaphragm effectively separates the water from the air cushion, preventing corrosion and ensuring that the water quality remains high. By absorbing excess pressure, the Reflex DD 33 helps to protect system components from stress, reduces the frequency of pump cycling, and contributes to a more stable and energy-efficient operation of your heating or hot water system.
Suitable for
Closed heating systems
Potable water heating installations
Systems requiring pressure stabilization
Residential and light commercial water circuits
When it may not be suitable
The Reflex DD 33 is not suitable for systems where the operating temperature exceeds 70°C, as this may compromise the integrity of the internal diaphragm. It is also not intended for use in open-vented systems or applications involving aggressive or non-potable fluids that are incompatible with the vessel's internal materials.
Key specifications
Capacity: 33 liters
Maximum operating pressure: 10 bar
Maximum operating temperature: 70°C
Color: Green
Type: Diaphragm expansion vessel
How to use
Installation should be performed by a qualified professional to ensure the system is correctly integrated. The vessel is typically connected to the cold water supply line of the heating or hot water system. Before installation, ensure that the pre-charge pressure of the vessel is adjusted to match the specific requirements of your system. Once connected, the vessel operates automatically, absorbing volume changes as the water heats up and expands.
What to consider before purchase
Verify that the 33-liter capacity is sufficient for the total volume of your system.
Ensure the maximum pressure rating of 10 bar is compatible with your system's safety valves.
Check that the installation location allows for proper maintenance and periodic inspection.
Confirm that the system temperature will not exceed the 70°C limit.
Usage recommendations
Regularly inspect the vessel for signs of external damage or corrosion and check the pre-charge pressure annually to ensure optimal performance and system safety.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 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

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