How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Fire-Fighting Hose Threads
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Rocker-Lug Fire Hydrant Caps and Plugs
Thread these caps and plugs onto fire hydrants and washdown equipment to close off the line. Their rocker lugs are easy to grip, so you can tighten them quickly. Tighten with a hook-style spanner wrench (not included). Caps and plugs are brass for good corrosion resistance.
NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads. NPSH (National Pipe Straight Hose) threads are compatible with male NPSH, NPT, NPTF and NPSM threads. Chicago Fire Department threads are only compatible with other Chicago Fire Department threads.
| Fire Hose Trade Size | Thread Type | Material | Lg. | Chain Lg. | Each | |
Cap | ||||||
|---|---|---|---|---|---|---|
| 1 | NH/NST | Brass | 1 7/32" | 9" | 00000000 | 000000 |
| 1 1/2 | NH/NST | Brass | 1 1/8" | 9" | 00000000 | 00000 |
| 1 1/2 | NPSH | Brass | 1 1/8" | 9" | 00000000 | 00000 |
| 2 1/2 | NH/NST | Brass | 1 7/16" | 9" | 00000000 | 00000 |
| 2 1/2 | NPSH | Brass | 1 9/16" | 9" | 00000000 | 00000 |
Plug | ||||||
| 1 1/2 | NH/NST | Brass | 1 11/16" | 9" | 0000000 | 00000 |
| 2 1/2 | NH/NST | Brass | 2 3/32" | 9" | 0000000 | 00000 |
| 2 1/2 | Chicago Fire Department | Brass | 2 3/32" | 9" | 0000000 | 00000 |
Quick-Access Caps for Pin-Lug Fire Hydrants
These caps are the fastest way to access fire hydrants and washdown equipment. To install them, loop the eyebolts over the pin lugs of the hydrant and secure them in place with nuts. In an emergency, break the cap by hitting it or prying it off with a spanner wrench. Caps are aluminum, which is lightweight with good corrosion resistance.
| For Fire Hose Trade Size | Material | Lg. | Each | |
| 2 1/2 | Aluminum | 3 1/2" | 000000 | 000000 |