What Size Is Garden Hose Thread?

Garden hoses are a staple in any outdoor space. They come in different lengths and diameters and need the right connection type for optimal performance. The most popular connection type is a female garden hose thread (also known as the GHT). Knowing what size of thread your fitting needs can be confusing but understanding the basic details can help you make the right purchase.

Understanding Garden Hose Thread

Garden hose thread (GHT) is an American National Standard (ANSI/ASME B1.20.1) for threading hoses and connecting parts. It is a taper thread fitting, meaning it is conically shaped in order to create an ideal seal. It is also known as the fire hose coupling.

GHT has a 3/4 outer diameter and a male connector fits into a female connector. All standard garden hoses, which range from to 5/8 in diameter, use GHT. The same thread is used across all North American connections, but in other countries, a garden hose thread can actually be a different thread type.

Measuring GHT

Understanding the measurements of GHT can help you ensure you're buying the right parts.

A tape measure can be used to determine the outside diameter of the female or male threads. It should measure 3/4. Or, alternatively, you can measure the inside diameter of the female connector which should measure just over 15/16.

GHT NPT Adapters

The National Pipe Thread (NPT) is a U.S. standard for threading pipes and fittings. It is slightly different from the GHT thread, so you may need an adapter when connecting hoses and fittings.

An NPT-GHT adapter can be screwed onto the female or male threads, as needed. It will have a male NPT connector on one side and a female GHT connector on the other.

Benefits of GHT

GHT is the most common thread fitting for garden hoses, and there are a number of benefits:

• It has a reliable seal and is more leak-proof than other threads.
• It's designed to be used with less torque, so it is easier to connect and disconnect.
• It is available in standard sizes.

Conclusion

Garden hose thread is a popular connection type for outdoor applications such as garden hoses, bird baths, and sprinklers. It is an American National Standard with a 3/4 outside diameter and a male connector fits into a female connector. Knowing the measurements of GHT and when to use an adapter are essential for making the right purchase. GHT is designed for an optimal seal and easy connection and disconnection.

Takeaways

• Garden Hose Thread (GHT) is an American National Standard.
• GHT has a 3/4 outside diameter and a male connector fits into a female connector.
• In other countries, a garden hose thread can actually be a different thread type.
• An NPT-GHT adapter can be used when connecting hoses and fittings.
• Benefits of GHT include a reliable seal, easy connection, and disconnection, and availability in standard sizes.