546196A - Discal DIRTMAG Air & Dirt Separator with Magnet - 1" SweatCaleffi 546196A Discal DIRTMAG Air & Dirt Separator with Magnet 1" Sweat 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