Exceptional Reliability The Sigelock hydrant exhibits excellent functionality in normal or emergency use situations. Open hydrants not only waste up to a million gallons of water per day but they endanger children playing in the streets, motorists, and residents. Sigelock’s clamshell design prevents unauthorized opening of the hydrant. There is no interruption or suspension of water delivery due to tampering. It opens in seconds, less than half the time of most existing hydrants, enabling firefighters to get water to fire sources faster. Greatly aids emergency response time. The Sigelock hydrant virtually eliminates the incidence of hydrants freezing which can cause them to be inoperable for fire operations.