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Garden Hose Thread Size – Complete Guide


Watering a garden using a garden hose is a common practice. Along with a garden hose, you can consider using a sprinkler or spray gun. That is when you will need fittings to attach different equipment with the garden hose properly.

Garden hose fittings ensure the proper flow of water without leakage or loss of pressure. Garden hose fittings are available in different sizes, and that is where you have to get garden hose thread measurement perfectly. In this article, we will discuss the thread measurement and size of your garden hose fittings and how to measure the size of the hose.

garden hose thread

What Is Garden Hose Thread?

A garden hose thread refers to the lines on garden hose fittings that allow the hose to fit the tap or external equipment perfectly. There are different garden hose thread sizes available. Getting the thread size perfect ensures tight fittings with uniformity. For standardization, garden hose thread size is referred to in National Hose (NH) and Garden Hose Thread (GHT). The most common thread size is 11.5 NH for gardening hose.

What Is Garden Hose Fittings Thread Size?

The measurement and thread size of your garden hose fittings are not according to the external or internal diameter. A standard garden hose has two designations. For thins-walled couplers, NHR is cut into full-form threads. Male threads for your  garden hoses (MHT) and female hose thread (FHT) are typically utilized in GHT.

In the United States, the outer thread diameter is 1.0625-inch and the thread pitch is 11.5 TPI. A 19 mm GHT fitting is perfect with an inner diameter of 125 mm and 15 mm. However, it has to be noted that GHT is not suitable with NPT. Although some hoses are suitable for National Pipe Straight Hose (NPSH) female. The US also has non-tapered parallel threads which make them unsuitable for sealing with a PTFE tape. To prevent leakages, fittings are combined with O-rings.

Unlike the United States, the rest of the world uses two versions of the British Standard Pipe Thread standard (BSP) namely British Standard Pipe Tapered (BSPT) and British Standard Pipe Parallel (BSPP). For garden hoses, BSPP is an ideal consideration. Garden taps come with a BSP thread of 3/4-inch. In commercial applications, we use a 7/8-inch BSP.

Sizes of Garden Hose Connectors

Garden hose connectors usually come in 3/4 or 5/8-inch. It is according to the inside diameter of the hose. Garden hose fittings also vary accordingly and the most popular size is 3/4-inch or 11.5NH. This size is also perfect for commercial purposes. It has to be noted that garden hose fittings will usually fit most hoses generally.

How Do You Measure the Size of a Hose?

To measure the size of a hose, what you need are matching connectors. By taking a tape, you can measure the fittings’ internal diameter as well as external diameter. The inside diameter is for female threads and the outside diameter is for male threads.

What you will have to do is lay the tape measure on the connector’s mouth and measure it from the inside top to the bottom. This will give you the fittings size. Measuring the outside can provide a higher number. People also tend to use vernier calipers or a ruler.

Conclusion

From the above, we have found the different garden hose thread sizes. We have also known how to measure the hose size. These are simple tasks and do not require professional help. As hose sizes are available in different ranges, you will have to know your usage and see if it suits the purpose. Just know that hoses are measured by the interior diameter. When you measure the outside diameter, it is the size of the tubes.



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