Bulk Meter Class B – Overview The Bulk Class B water meter has an epoxy-coated cast iron body. This Woltmann-type meter is suitable for measuring bulk flows of potable water. It can be used for industrial and commercial applications and distribution system monitoring. Bulk Meter Class B – Features Class B accuracy Direct reading across all meter sizes Register rotation through 360° Large flow capacity with low pressure loss Pulse output included Compliant with ISO 4064 & SANS 1529-1