Female NPT Fitting: The Leak-Proof Solution You Need!

Tired of pesky leaks plaguing your plumbing projects? Say goodbye to drips and frustrations with Female NPT Fittings! Their innovative tapered threads and secure seal ensure leak-proof connections, saving you time, money, and headaches. Get a quote today and experience the peace of mind that comes with reliable plumbing connections!

Trending Female NPT fittings

1:2 female npt fitting

1/2 NPT female fitting

Kingdaflex offers top-notch 1/2″ NPT female fittings, ensuring a perfect leak-proof seal for your plumbing projects. Get a free quote today and experience the Kingdaflex difference! We offer high-quality fittings at competitive prices.

1:4 female npt fitting

1/4 NPT female fitting

Your project demands precision. Don’t settle for ill-fitting parts! Kingdaflex offers a comprehensive selection of high-quality 1/4″ NPT female fittings, ensuring a secure, leak-proof connection every time. Get a quote today and experience the Kingdaflex difference. We offer competitive prices and exceptional customer service, making your NPT fitting needs a breeze.

1:8 female npt fitting

1/8 NPT female fitting

Ensure a secure, leak-free connection in your plumbing project with a high-quality 1/8″ NPT female fitting. Kingdaflex offers a wide variety of fittings at competitive prices. Don’t wait for leaks to cause headaches – get a quote today and experience the confidence of knowing you have the right parts for the job!

3:4 female npt fitting

3/4 NPT female fitting

Need a dependable 3/4″ NPT female fitting for your next project?  Kingdaflex offers a robust selection of high-quality NPT fittings, including the versatile 3/4″ female. It’s perfect for creating secure connections in your plumbing or industrial applications. Get a quote today and experience the Kingdaflex difference – competitive prices, reliable products, and expert support to ensure your project’s success.

3:8 female npt fitting

3/8 NPT female fitting

Need a reliable 3/8″ NPT female fitting for your next plumbing project? Kingdaflex! high-quality brass fittings are designed for durability and a perfect seal, everytime. Get a quote today and experience the Kingdaflex difference! Contact us directly – we’re dedicated to providing you with the right fittings at competitive prices.

female npt bulkhead fitting

female NPT bulkhead fitting

Need a secure and leak-proof connection point for your bulkhead application? Kingdaflex offers top-notch female NPT bulkhead fittings, perfect for creating a barrier while maintaining fluid flow. Our durable fittings are built to last, ensuring a reliable seal for your project. Get a quote today and experience the Kingdaflex difference! We’re dedicated to providing you with the best fittings at competitive prices.

female npt swivel fitting

female NPT swivel fitting

Tired of struggling with rigid pipe connections? Kingdaflex’s female NPT swivel fittings offer a solution! These versatile fittings allow for easy positioning and adjustments after assembly, preventing stress on pipes and reducing the risk of leaks. Made from durable, corrosion-resistant materials, they ensure a secure and long-lasting connection. Get a quote today and experience the Kingdaflex advantage! Contact us directly – we’re your one-stop shop for all your NPT swivel fitting needs.

flare hose fittings

female flare NPT fitting

Need a reliable female flare NPT fitting for your project? Kingdaflex offers a wide selection of high-quality fittings designed for a perfect seal with both NPT threads and a flared tube connection. Our fittings are built for durability and resist leaks, ensuring a long-lasting, trouble-free connection. Get a quote today and experience the Kingdaflex difference! We’re dedicated to providing the right fittings for your needs.

Female NPT Fitting FAQs

A female NPT fitting is a type of pipe fitting designed to create a secure and leak-proof connection in plumbing and gas systems. Here are key features of female NPT fittings:

Appearance:

  • Has a threaded hole on the inside diameter.
  • This hole allows pipes or male NPT fittings to screw into it for a tight connection.

Function:

  • The internal threads are tapered, following the National Pipe Thread (NPT) standard.
  • This taper creates a tighter seal as the male NPT fitting screws in, ensuring a leak-free connection when used with proper sealant.

Applications:

  • Commonly used in various plumbing and gas systems, including water and gas lines, air compressor systems, hydraulic systems, irrigation systems, and instrumentation/control systems.

Materials:

  • Available in various materials, each with its own advantages:
    • Brass: Popular choice for affordability, corrosion resistance, and machinability.
    • Stainless Steel: Offers superior strength, corrosion resistance, and suitability for high-pressure applications.
    • Steel: Strong and cost-effective, but more prone to rust compared to stainless steel.
    • Polypropylene (PP): Ideal for lightweight applications and resistant to some chemicals.

Using Female NPT Fittings:

  • To determine the size, consider the Nominal Pipe Size (NPS), which is a designated size category, not the actual diameter.
  • Measure the outside diameter (OD) of the male NPT fitting that will screw into the female fitting and subtract ¼ inch to get the approximate NPT size of the female fitting. NPT sizing charts can also be used for size verification.
  • Always use a thread sealant like Teflon tape or pipe dope on the male threads before screwing them into the female fitting for optimal leak prevention.
  • Hand-tighten the connection first, then use a wrench for an additional quarter to half turn, avoiding over-tightening, which can damage the threads.

Identifying a female NPT fitting is quite straightforward. Here’s what to look for:

Internal Threads: The key giveaway is the presence of threads on the inside diameter of the fitting. This threaded hole is designed to receive a male NPT fitting or a pipe with male NPT threads.

Compare to Male NPT: Imagine a male NPT fitting. It has a threaded protrusion on the outside. In contrast, the female NPT fitting has the opposite feature – a threaded hole on the inside.

Look for Size Markings (Optional): While not always present, some female NPT fittings might have markings indicating the Nominal Pipe Size (NPS) on the body. However, relying solely on markings isn’t recommended; measurement is always best practice.

Here’s a quick comparison to solidify the distinction:

FeatureMale NPT FittingFemale NPT Fitting
Thread LocationExternal (protrusion)Internal (hole)
ConnectionScrews onto female NPT fitting or pipe with female threadsReceives male NPT fitting or pipe with male threads

Additional Tips:

  • If you have both the male and female NPT fittings for your project, try screwing them together. The male threads should fit snugly into the female fitting’s internal threads.
  • You can find pictures of female NPT fittings online or in plumbing reference guides to visually compare them with your fitting.

By remembering these key points, you’ll be able to confidently identify female NPT fittings and ensure you have the right components for your plumbing project.

These fittings come in various materials, each with its own advantages:

  • Brass: Popular choice for its affordability, corrosion resistance, and machinability.
  • Stainless Steel: Offers superior strength, corrosion resistance, and suitability for high-pressure applications.
  • Steel: Strong and cost-effective, but more susceptible to rust compared to stainless steel.
  • Polypropylene (PP): Ideal for lightweight applications and resistant to some chemicals.

The size is determined by the Nominal Pipe Size (NPS), which is a designated size category rather than the actual diameter. You’ll need to measure the outside diameter (OD) of the male NPT fitting that will screw into the female fitting and subtract ¼ inch to get the approximate NPT size of the female fitting. NPT sizing charts can also help identify the size based on the OD and thread count (TPI).

Yes, even though NPT threads create a tight seal, it’s highly recommended to use a thread sealant like Teflon tape or pipe dope on the male threads before screwing them into the female fitting. This ensures a leak-proof connection.