qertfresh.blogg.se - Fire hydrant

You only see the fire hydrant, so it’s easy to forget all of what’s underground, but there’s plenty. Okay, so those are the basics on fire hydrants, but as we said, the hydrant is one part of a larger system. The name tells you that these fire hydrants start out empty so the water doesn’t freeze when it’s not in use. The other and much more prevalent type of hydrant is the dry barrel hydrant. The operating stems are nearer to outlets, and there tends to be more of these stems per fire hydrant. Wet barrel fire hydrants always have water in them without the need to set the valves to an open position. You’ll see these more in Florida and southern California than the rest of the United States due to the warm weather there. The bonnet is for more than just looks, by the way, but also for preventing water penetration and other damage from shortening the lifespan of the fire hydrant.Įven though all fire hydrants have these parts, there are still two distinct types of hydrants.

Within the bonnet is the operating stem nut. Bonnet: The fire hydrant’s cap is known as its bonnet.Flange: The flange is an attachment point for the fire hydrant and is located at the hydrant’s base.

The outlets may include a pumper outlet for the firefighters to attach to their pumper trucks.

Outlets: All fire hydrants have outlets, but how many and their sizes vary based on the type of hydrant.

This pentagon-shaped nut allows for access to the fire hydrant’s operating stem, which opens the valves.

Stem nut: To use any of the valves included with a fire hydrant, the stem nut comes into play.

These valves are often closed by default but can be opened by a firefighter when needed.

Valves: The valves are one of the most distinct components of a fire hydrant, as mentioned in the paragraph above.

They tend to have rounded, triangular tops with protruding valves on the sides. Having existed since the 19 th century as an above-ground feature, fire hydrants are shaped like pillars. The average height of a fire hydrant is three feet. They’re almost always by a pavement edge or a curb due to the water main location. Used all over the world, fire hydrants are installed near a water main (usually within 24 inches). The hydrant will feature bronze or waterworks brass for the nozzles, drain valve area, and the main valve. A fire hydrant is typically made of ductile iron or cast iron for durability. We’ll talk in the next section about the underground components of a fire hydrant, but for now, this is all about the hydrant itself.

Okay, so what exactly is a fire hydrant, anyway? Are Fire Hydrants Considered Public or Private Property?.What Is the Max Flow Rate and PSI of Fire Hydrants?.