NST Fire Hose Reducer / NH Fire Hose Adapter is the standard American fire hose transition fitting designed to solve size mismatch issues between different fire hose lines, fire nozzles, fire hydrants and fire pump outlets. Manufactured strictly according to ANSI/NFPA 1963 national fire standards, this pin lug style hose reducer provides precise NH/NST thread connection, perfect tight sealing and stable high-pressure performance for professional firefighting applications.
We supply full-size customizable conversion adapters covering all mainstream American fire hose sizes: 1.5”, 2”, 2.5”, 3”, 4”, 4.5”, 5”, 6”. Whether you need large-to-small reducing connection or small-to-large increasing connection, we can customize male and female thread ends according to actual equipment matching requirements.
Two material options are available to meet different application scenarios. Brass NST reducers feature high pressure resistance, corrosion resistance and long service life, ideal for professional fire department daily use and heavy-duty industrial fire systems. Aluminum NST adapters are lightweight, cost-effective and easy to carry, perfect for bulk fire hose assembly, municipal fire projects and commercial fire equipment matching.
All adapters adopt classic pin lug quick-connect design, allowing fast installation and removal without tools during emergency fire rescue. The precisely machined NST/NH thread ensures smooth connection, accurate fit and zero leakage under long-term high water pressure impact.
Key Features
ANSI / NFPA 1963 certified American standard fire hose fitting
Full size conversion: 1.5”–6” all NH/NST size combinations customizable
Supports both reducing and increasing thread transition
Pin lug quick connection structure for fast field operation
High precision NH/NST thread, leak-proof and pressure-resistant
Brass & aluminum optional for different fire service demands
100% interchangeable with US standard fire hoses, nozzles and hydrants
Applications
Fire department emergency rescue & daily fire fighting
Fire hose factory finished hose assembly and size matching
Municipal fire protection engineering and fire pipeline transformation
Fire hydrant, fire pump and fire nozzle connection transition
Fire equipment wholesale and distribution business
As a professional manufacturer of American-standard fire hose fittings, we support custom size production, bulk wholesale and OEM cooperation. Complete specifications, stable quality and fast delivery make us a reliable long-term supplier for North American fire hose manufacturers and fire protection distributors.
