Sensor networks have emerged as a promising tool for monitoring (and possibly actuating) the physical world; utilizing self-organizing networks of battery-powered wireless sensors that can sense, process, and communicate. In Wireless Sensor Networks (WSNs), energy is a critical resource; hence power efficient routing protocols is necessary for data transmission in order to extend the network lifetime. Recently number of efficient chain based protocols has been proposed for WSNs routing. These routing protocols have achieved lowest consumed energy and delay. However, fault-tolerance was not considered in these protocols.