Diaphragm expansion vessel REFIX DD-25, 25L, 10 bar / 70°C, threaded connection G3/4", green, for DHW, vertical, with non-replaceable membrane, with tee Rp 3/4". 7308400

Expansion vessel for pressure stabilization in DHW systems

This is a REFIX DD-25 expansion vessel with a capacity of 25 liters, designed to maintain stable pressure in domestic hot and cold water systems, as well as in pressure boosting systems. Its construction based on a diaphragm membrane provides effective protection against pressure fluctuations, compensates for changes in water volume due to temperature, and compensates for water losses in the installation. This solution is particularly appreciated in systems with water heaters, where it helps to save resources.

The REFIX DD-25 vessel is not only a pressure buffering element, but also an integral part of a system ensuring the safety and efficiency of the installation. Thanks to the use of high-quality materials and compliance with DIN 1988 standards, it guarantees reliable operation and long service life. A G3/4” threaded connection simplifies installation and integration with existing hydraulic infrastructure. Additionally, the included Rp 3/4” tee simplifies connection to the installation.

• Versatile application: ideal for DHW installations, pressure boosting and water heating systems – compliant with DIN 1988 standard.
• Protection and stabilization: maintains pressure within acceptable limits, protecting against exceeding the maximum working pressure and falling below the minimum level.
• High quality workmanship: connection made of stainless steel ensures hygiene and durability, meeting the requirements of DIN 1988 standard.
• Safety confirmed by certificates: has PZH approval and approval in accordance with the pressure equipment directive 2014/68/EU.
• Durable membrane: non-replaceable diaphragm membrane compliant with PN-EN 13831, DIN 4807 part 5, KTW-C and W 270 standards ensures long-term operation without maintenance.
• Easy installation: equipped with a G3/4” threaded connection and an included Rp 3/4” tee.
• Compact design: hanging vessel with a capacity of 25 liters – ideal where space is limited.

The REFIX DD-25 expansion vessel is a solid choice for both professional installers looking for a reliable component for their projects, and for end users who want to ensure comfort and safety in their homes. Its green color makes it easy to identify in the hydraulic installation. Thanks to the use of a High-Flow flow solution with a flow guide, it ensures efficient operation even with high water demand.