Filling Valves

Filling valves are a crucial component in water-based heating systems, underfloor heating systems and cooling systems where controlled filling of water or heat carrier fluid is required. By installing a reliable filling valve, you ensure that the system is maintained at the correct pressure level and functions efficiently over time.

At Velltra you will find carefully selected filling valves from established manufacturers such as LK Armatur. The products in our range are designed for easy handling, high tightness and long durability in both households and larger properties. Discover our range of quality-assured valves for safe and easy installation.

Choose the right filling valve for your heating system

A filling valve is mainly used to fill and top up the liquid level in closed heating systems, heat pumps and underfloor heating circuits. The valve is usually placed between the fresh water system and the heating system to enable controlled filling when required.

Benefits of approved filling valves

  • Safe operation: Enables safe filling without the risk of accidental leakage when the valve is closed.
  • Durable materials: Made of robust brass that resists corrosion and wear for a long time.
  • Flexible installation: Available in different designs and thread sizes to suit existing pipework.
  • Integrated backflow protection: Some models are equipped with built-in check valves (such as EA protection) to prevent system water from flowing back into the drinking water system.

Important things to consider before purchasing

Before ordering a new filling valve, it is important to check the following points to ensure correct fit and function:

  • Dimension and thread: Check whether your connections require external or internal thread and which dimension (for example G¾") fits your pipe system.
  • Requirements for backflow protection: Depending on the design of the installation and local building regulations, a valve with built-in backflow protection may be required.
  • Location: Ensure that there is enough space around the installation to be able to easily turn the knob for future fillings.

Common areas of use

Filling valves are mainly used in residential and property installations where there is a final heating system. This includes filling water in geothermal heating systems, air-to-water heat pumps, pellet boilers and underfloor heating systems. By choosing a quality valve from well-known brands, you will get an installation that is leak-proof and functions without problems for a long time to come.

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