Aluminum 2 1/2" Female NH to 1 1/2" Male NH Fire Hose Adapter
Description
- This Made in the USA lead free aluminum adapter comes with a gasket and is manufactured with a 600 psi test rating.
- The female side of this adapter will only connect to a 2 1/2 inch NH or NST fire hydrant or male fitting with an outside diameter of 3 1/16 inches.
- The male side of this adapter will only thread into a 1 1/2 inch NH or NST nozzle or female fitting. The outside diameter of the male is 2 inches.
- National Hose (NH) is the same as National Standard Thread (NST) aka "Fire Hose Thread" is the most common thread type in use by United States fire departments today.
- When NH or NST threads are connected, they use a gasket to create a seal to prevent water leaking. Spanner wrenches are used to tighten and untighten two adapters.
NH / NST: The most common thread type in use by fire departments today is NST or National Standard Thread. NST also goes by the initials NH or National Hose. It can even be referred to as NHT or National Hose Thread but NST or NH is more common these days. NH = NST.
NPSH: National Pipe Straight Hose (NPSH) or Iron Pipe Thread (IPT) has the same threads per inch (TPI) as National Pipe Tapered (NPT) but the thread does not taper. NPSH is a straight thread and seals by a gasket in the female coupling which allows for a swivel, just like NH / NST, which make both ideal for hose couplings. Warning - It will NOT thread into a female NPT pipe. For example, a male NPSH coupling will NOT thread into a female metal or pvc pipe.
NPT: National Pipe Tapered is common in plumbing and some industrial uses. Sometimes referred to as pipe thread because PVC pipe and schedule 40 pipe are typically threaded in NPT. As its name implies this is a tapered thread so that the outside diameter of the male (ODM) gets smaller towards the end of the fitting and the inside diameter of the female narrows with depth. As the two fittings are threaded together the opposite tapers force thread friction and makes the seal without the use of a gasket.