Diaphragm expansion vessel REFIX DD-12, 12L, 10 bar / 70°C, threaded connection G3/4", white, for DHW, vertical, with non-replaceable membrane, with tee Rp 3/4". 7307800

Diaphragm expansion vessel – stability and installation protection

The REFIX DD-12 diaphragm expansion vessel is a key element of every central heating and domestic hot water system. Its task is to maintain optimal pressure in the system, compensate for changes in water volume resulting from temperature fluctuations, and store a water reserve. This ensures stable operation of the installation, protecting it from damage caused by excessive or insufficient pressure.

This is a diaphragm vessel with a capacity of 12 liters, designed to operate at a maximum pressure of 10 bar and a temperature of up to 70°C. It is equipped with a G3/4” threaded connection, which facilitates installation in existing systems. The white housing makes it blend aesthetically into the surroundings. Intended for use in domestic hot water systems, it is mounted in a hanging position.

Construction and special features

The REFIX DD-12 vessel is characterized by a solid construction and the use of high-quality materials. It has a non-removable bag diaphragm that meets strict European standards (PN-EN 13831, DIN 4807 part 5, KTW-C and W 270). The set includes a Rp 3/4” tee, which facilitates connection to the installation. Additionally, the vessel has a PZH certificate, which confirms its safety for health and the environment. The connections are made of stainless steel, which guarantees high corrosion resistance and ensures hygienic use – particularly important in drinking water installations.

Application and benefits

REFLEX DD diaphragm vessels are widely used in installations:

• Domestic water – provide comfort by stabilizing water pressure.
• Pressure boosting – eliminate problems with low water pressure in taps and showers.
• Water heating – protect the boiler from damage caused by changes in water volume during heating.

Thanks to the use of the REFIX DD-12 vessel:

• You increase the lifespan of the installation: Stable pressure reduces stress on pipes and system components.
• You save water: The vessel stores a water reserve, minimizing losses resulting from frequent refills.
• You ensure comfort: Stable water pressure guarantees convenience when using sanitary devices.
• You meet regulatory requirements: The product has the necessary certificates and approvals for use in water installations.