The outer diameter of a standard garden hose thread (GHT) connector is 1.0625 inches (27 mm), commonly referred to as a 3/4-inch fitting. Despite the varying internal diameter of the hose itself (e.g., 1 /2 ", 5 /8 ", or 3 /4 "), nearly all standard residential garden hoses use this identical connector size so they fit interchangeable spigots and sprinklers.
Hose diameters range from 3/8 inch, 1/2 inch and 3/4 inch. The bigger the diameter, the more water is delivered. The most common garden hose thread size is 3/4 inch.
To attach a hose to a garden tap which has a thread you will need a tap adapter which will normally be 3/4 BSP. For help identifying your tap size take a look at our blog Garden tap thread size.
Male garden hose threads are all 3/4" with an outside diameter of 1.0625 and 11-1/2" threads per inch.
If the inner diameter is approximately 15.88 mm, it is a 5/8-inch hose—commonly used for home gardening or car washing. If the measurement is 19.05 mm, it is a 3/4-inch hose—typically used for large-scale garden irrigation or commercial applications.
A 3/4-inch hose is a bigger hose that carries more water but is heavier.
No, not all garden hoses have the same fittings, although certain branded hose pipes offer universal connectors designed to fit their own hose pipes. Before purchasing any hose connectors it's a good idea to check the diameter of your hose pipe so any new fittings will properly fit.
Hosepipe fittings are either classed as male or female. The female hose connectors are used on the ends of hose (hence the name hose end connectors), and the male is used on the taps and watering accessories such as spray nozzles and lawn sprinklers.
First measure the port hole diameter using a caliper. Next, measure the longest bolt hole spacing from center to center or measure the flange head diameter. Most fluid pipe and tube sizes in the United States are identified by dash numbers, abbreviations that make ordering components easier.
A hose width of 12mm is generally the most practical and most common garden hose diameter, and you'll find that it's a good combination of water flow and pressure without being too heavy.
The original Hozelock Outdoor Tap Connector fits onto standard garden taps with a 3/4" BSP or 1/2" BSP male thread outlet.
Garden hose thread size is referred to in National Hose (NH) and Garden Hose Thread (GHT). The connector sizes are generally 3/4" or 5/8" (based on the internal diameter of the hose) which may vary, the most popular size is 3/4" (11.5 NH).
Standard Garden Hoses - 12mm (½”)
The measure indicates the interior diameter of the hose. The smaller the diameter, the fewer gallons per minute can pass through it, limiting the amount of water that you can apply to the garden during a given time. The pressure in your water supply is also a factor in the flow rate of a garden hose.
Universal: This garden hose quick connector is compatible with all garden hoses, watering equipment, sprinklers, nozzles, and more. These standard 3/4-inch threaded aluminum garden hose quick connectors are essential accessories for any watering system.
1/2" pipe refers to the internal diameter, 15mm pipe is the external diameter... In my experience they are so similar that you can even use solder fittings without a worry, so using 15mm olives on 12" pipe isn't a problem. Occasionally they are very marginally tight, but not enough to be an issue.
The most common type of hose connector is a threaded connector, which is typically made of brass or plastic and is used to connect two hoses of the same size.
There are three main types of hose connections available, these being quick connector (Hozelock type) fittings, Geka type hose fittings, and hose coupler fittings. Each type has pros and cons, so the type that's most suitable for you will depend upon your own situation and preferences.
Garden Size and Watering Needs
When you're looking at 5/8 or 3/4 garden hose options, you need to consider your garden's size and watering needs to get the perfect one. If you have a large garden, you need longer hoses with higher water flow capacities. So, you'll need the ¾-inch diameter hose.
The 135 rule means horizontal drain pipes cannot connect using a fitting that creates more than a 135-degree change in direction. In plain terms, you cannot use a standard short-turn 90-degree elbow between two horizontal drain lines. Plumbers use two 45-degree elbows, a long-sweep 90, or a wye-and-eighth-bend instead.
The fraction 1/2 (one-half) means dividing something into two equal parts, while 3/4 (three-fourths) divides it into four equal parts but takes three of those parts. These concepts are not just found in math textbooks—they play a critical role in measuring liquids or solids in the kitchen.