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These are earthquake-sensitive gas shut-off valves. They are intended to close in the event of an earthquake to prevent gas flow into a structure where earthquake damage may have occurred.
This will greatly reduce potential risk of explosion or fire due to loss of gas line integrity or uncontrolled flow of gas after a major earthquake.
Model: VB-301 NPT Vertical, Bottom In 7PSI
SKU: VB-301
Weight: 5 lb
Dimensions: 5 in × 5 in × 5 in