Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
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title: Fire Hydrants
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## The hydrant bury depth shall match the depth of cover over the supply main, verified against actual main depth and local frost depth.
−### Hydrant barrel length is fixed at manufacture; specifying bury depth from a generic schedule without confirming the as-designed main depth and frost depth forces a field extension or a complete hydrant replacement. The 80% case in the temperate United States is 4 ft to 4.5 ft of cover.
+### Hydrant barrel length is fixed at manufacture; specifying bury depth from a generic schedule without confirming the as-designed main depth and frost depth forces a field extension or a complete hydrant replacement. Typical cover in the temperate United States is 4 ft to 4.5 ft.
### Where the main is deeper than the standard bury depth, hydrant extension sections shall be specified in 6 in. increments and called out on the civil drawings.
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## The supply pipe to each hydrant shall be not less than 6 in. for private systems, and 8 in. is the default for new private mains.
−### NFPA 24 permits a 6 in. minimum supply, but an 8 in. supply is recommended for new private systems and is the 80% case because it sustains pumper flows with lower friction loss.
+### NFPA 24 permits a 6 in. minimum supply, but an 8 in. supply is recommended for new private systems and is the usual choice because it sustains pumper flows with lower friction loss.
## Hydrant placement, lateral routing, and the limits of the fire service main shall be taken from the civil/site drawings. [[drawing: hydrant location plan]]
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- Replacement nozzle caps, gaskets, chains
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