brass fire hydrant 1) size: 1-1/2", 2" and 2-1/2"; 2) material: brass. fire hydrant is a mechanical means for stopping and starting flow in a conduit;
many types used in firefighting, including gate , foot , clapper (backflow preventers), sprinkler-heads, etc.
1) size: 1-1/2", 2", 2-1/2"
2) material: brass.
