Model994 BLT Portable Hydrant Backflow Preventer is for use in protection of potable water from a fire hydrant or other nonpermanent installation where flow is in one direction only and the possibility of a cross-connection exists.

• 型号994BLT移动式消防栓防回流阀适用于保护饮用水系统不会受到消防栓或其他流向只是单向或存在交叉连接可能的临时性安装的应用场合。