Differential Bypass Valve: A compact brass valve designed to prevent hydraulic interference in floor heating or cooling systems. It ensures stable water flow and protects sensitive components, contributing to improved efficiency and longlasting performance. Versatile application and easy pressure reading: Suitable for HVAC setups including heat pumps and centralized heating. The dualunit display shows pressure in bar and mH2O for accurate readings from any angle. Hydraulic balance and size: Helps reduce hydraulic interference and promote balanced water flow in small boiler systems. Designed to support reliable operation with a 33MM thread diameter and a 155MM total height, helping to prevent damage and maintain performance. Compact design and material durability: Spacesaving construction fits into tight spaces while delivering dependable performance. Made from durable brass for general use in heating and cooling applications. Use scenarios Residential underfloor heating with a heat pump: Maintains balanced flow and protects pumps and sensors from pressure fluctuations, improving comfort and system longevity. Small central heating system with a boiler: Reduces hydraulic interference and promotes stable, even heat distribution within the compact 33MM connection footprint. Retrofit cooling or multizone HVAC installations: Stabilizes pressure during operation, protecting components and ensuring consistent performance across zones.