Change Threads From 4" NPT Pipe To 4.5" Male NST (NH) Threads
This adapter let's you hook your fire hose into standard pipe threads. It's one of the most popular and common way to change threads. Simply screw it on, and you're ready to go. Hook it into pumps, valves, hydrants, standpipes, & more.
- The NST (NH) Male side of adapter can hook into NST (NH) Female threads only.
- The NPT Female side of the adapter can hook into NPT Male only.
- Full Brass
- 4" NPT Female Pipe x 4.5" NST (NH) Male Hex Adapter
- NST (NH) - National Standard Thread (National Hose)
- NPT - National Pipe Tapered
More About Female To Male Adapters
A pipe fitting adapter is used to connect straight pipe or hose sections, to adapt to different sizes or shapes, and for other purposes.
Pipe adapter is a length of straight or tapered pipe with male or female threads on both ends. It is one of the most popular category of pipe & hose fittings. It is a connector or a coupling threaded on both ends. Pipe adapters are used to allow items with different threads to be connected together. They are used to fit straight / tapered end hose or pipes. A combination of pipe adapters are recommended for low-pressure discharge and suction service for various compatible liquids and not for compressible products like air, nitrogen or steam.
A coupling (or coupler) (used in piping or plumbing) is a very short length of pipe or tube, with a socket at one or both ends that allows two pipes or tubes to be joined, welded (steel), brazed or soldered (copper, brass etc.) together.
Alternatively if a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female.
If the two ends of a coupling are different (e.g. one NST/NH threaded and one NPT threaded), then it is usually referred to as an adapter.
A pipe coupling is any fitting or device used to join two or more pipes in such a way that continuity is maintained between them. The body of a pipe coupling is typically made of the same or similar materials as those used to construct the pipes it joins. They may be rigid or flexible depending on the amount of movement the pipe is subjected to and may per permanent or removable fixtures. A pipe coupling can be stepped or reduced in internal diameter to accept pipes of different sizes, be T or cross shaped to join more than two pipes, or angled to form bends. Pipe couplings may also include peripheral features or equipment such as inspection openings, flow meters, or valves.
We 100% guarantee our brass adapters. If you are unhappy with your purchase you can return it within 30 days NO QUESTIONS ASKED! If you have any questions, give us a call at +1(510)237-5000.
All products are shipped within 24 hours of ordering Monday-Friday unless otherwise specified on the individual product description page. Your tracking number will be sent via email. Your item will ship from one of our three warehouses (California, Ohio, New York) depending on your location and stock availability. Most orders ship via USPS Air Priority, UPS Ground, or FedEx Ground. Most items ship free. If you need express shipping, please call us 1 (510) 214-3093 and ask us for help.
Returns on most new and unused items are accepted within 30 days of purchase unless items are described as "Special Order", "Used or Scrap", "Bulk Discounted Orders", "International Orders" or "Rare Fitting" in the product title or description. Custom length hoses are non-returnable. Custom lengths is anything outside of 25, 50, 75, or 100 feet. Customer is responsible for return shipping charges. If a return label is issued from Fire Hose Supply the return shipping fees will be deducted from the refund. A standard 25% restocking fee is applied to all returns. Returns must be approved before sending in. Contact us for an RGA or return slip for approval before you send in your returns. Once your returns slip has been issued it will list instructions with a ship-to address. Any return orders sent without an RGA or previous authorization may be rejected.
✔️ Special Order, Custom Order, Bulk Discount Orders, Rare Fittings & International Order Items
Special order, custom order, bulk discount orders, rare items & international order items cannot be cancelled or returned. Rare fittings include but are not limited to 2" NH (NST) and 3" NH (NST) fittings. Please make sure you are 100% sure of the product specifications you are ordering. If you don't fully understand the products you are ordering, please ask us for help to confirm the correct specifications you're looking for. Special order items are usually non-standard parts or bulk orders that are custom made directly from the factory.