The Caleffi DISCALDIRTMAG® magnetic air and dirt separator incorporates three important functions for hydronic systems: air separation, dirt separation and ferrous impurity separation. An internal screen element facilitates the coalescing and capture of micro-bubbles to facilitate high performance automatic air removal, while concurrently causing the capture of non-ferrous debris particles down to 5 micron size. A powerful magnetic field induced by rare-earth neodymium magnets facilitates the capture of ferrous impurities such as iron oxide down to microscopic size thus delivering 2-1/2 times the ferrous impurity removal performance of standard air and dirt separators. The DISCALDIRTMAG® saves on system installation and maintenance costs as three devices are combined into one. Additionally, all captured debris is blown down through the purge valve without taking the system offline.The circulation of fully de-aerated and cleaned water enables the equipment to operate under optimum conditions, free from noise, corrosion or mechanical damage.