Size Of Garden Hose Thread: 2026 Guide & Chart

Most U.S. garden faucets and hoses use 3/4-11.5 GHT (Garden Hose Thread).

If you have ever been stuck with leaks or mismatched fittings, this guide is for you. I’ll break down the size of garden hose thread with clear steps, pro tips, and real examples. You will learn what fits what, how to measure threads, and which adapters solve common issues fast.

Understanding Garden Hose Thread Standards

When people ask about the size of garden hose thread, they usually mean the thread on the spigot or hose end. In the United States, that thread is GHT, also written NH. The standard size is 3/4-11.5 GHT, which uses straight threads and seals with a washer. That is why tape on the threads is not needed for a normal hose-to-spigot link.

Do not mix up hose diameter with thread size. A hose can be 1/2 inch, 5/8 inch, or 3/4 inch inside diameter. The ends still use the same 3/4-11.5 GHT threads. The size of garden hose thread is about the fittings, not the water path inside the hose.

I follow the ASME B1.20.7 standard for Garden Hose Coupling Threads when checking specs. It sets the pitch, form, and gauge so parts work together across brands.

Standard Dimensions and How To Read Them

You will see hose threads written as 3/4-11.5 GHT or 3/4-11.5 NH. Here is what that means:

• 3/4 is the nominal thread size, not the outside diameter you can see.
• 11.5 is the threads per inch.
• GHT uses a 60-degree thread angle and straight (parallel) sides.

Key numbers you can use at home:

• Male 3/4 GHT outside diameter is about 1.0625 inches, or 1-1/16 inches.
• The seal is at the flat washer inside the female end, not on the threads.
• A typical garden hose washer is about 1 inch outside diameter, 5/8 inch inside, and 1/8 inch thick.

If you search the size of garden hose thread for less common parts, you may find 1/2 GHT or 1 inch GHT in niche gear. Most home use is still 3/4-11.5 GHT. That is the answer most shoppers need.

GHT vs NPT vs BSP: Compatibility and Adapters

Many leaks come from mixing thread types. The size of garden hose thread in the U.S. is GHT. Your plumbing parts may be NPT. Gear from outside the U.S. may be BSP.

• GHT vs NPT: GHT is straight thread and seals with a washer. NPT is tapered and seals on the thread flanks. 3/4 NPT is 14 TPI, so it will not match 11.5 TPI GHT.
• GHT vs BSP: 3/4 BSP has 14 TPI and a 55-degree angle. It is also not the same as 3/4-11.5 GHT.

Use a proper adapter when you must cross standards. I keep brass GHT-to-NPT adapters in my kit, such as 3/4 GHT female to 1/2 NPT male. It is a clean, safe fix. Do not force a fit. Forced threads chew up parts and cause slow leaks that waste water.

Male, Female, and Sealing: How Connections Stay Dry

The faucet on the wall is a male hose thread, often marked MHT. The hose end that spins is a female garden hose thread, marked FGH. The seal happens when the washer in the female end presses on the flat face of the male end.

To keep the seal sound:

• Use fresh washers. EPDM rubber lasts well in sun and heat.
• Replace crushed or hard washers each season.
• Avoid PTFE tape on GHT threads. It does not help the seal and can hide a bad washer.
• Hand-tight plus a small snug with pliers is fine. Do not over-tighten.

If the size of garden hose thread is right but you still have drips, change the washer first. It fixes most issues in seconds.

How to Measure the Size of Garden Hose Thread at Home

If you are not sure what you have, measure. You only need a ruler and a good eye. A small caliper helps.

• Measure the outside of a male thread. If it is near 1-1/16 inches, it is likely 3/4 GHT.
• Count threads per inch. Mark one crest and count 11.5 threads across one inch. You can count 23 over two inches for an easier view.
• Check the seal face. A flat face that meets a flat washer points to GHT. A tapered thread that needs tape points to NPT.
• Take the part to a hardware store if you are stuck. Ask for 3/4-11.5 GHT. State that you are asking about the size of garden hose thread, not pipe size.

I have seen many people buy a 3/4 NPT part by mistake. It looks close but will not seat right. A quick measure saves the trip back.

Common Problems and Fixes

Real-world issues crop up even when the size of garden hose thread is correct. Here are the top ones I see and how I fix them.

• Cross-threading. Start by hand and feel for a smooth start. If it feels gritty, back off and realign.
• Old or missing washer. Replace the washer first. It is cheap and fast.
• Plastic threads cracked. Swap to brass fittings for everyday use. Plastic is light but easy to damage.
• Mixed standards. If parts will not start clean, check TPI and angle. Use a GHT-to-NPT or GHT-to-BSP adapter.
• Freeze damage. If a sillcock leaks after winter, the valve may have split. That is not a thread issue. Replace the valve.

Each step keeps the connection sound and respects the correct size of garden hose thread.

Adapters and Upgrades I Trust

In my own yard and on client sites, a few parts have saved the day. They respect the size of garden hose thread and make life easy.

• Brass GHT-to-NPT bushings. I use them to link hoses to filters, pumps, or drip systems made for NPT.
• Quick-connect sets with O-rings. They cut setup time. Choose solid brass for long life.
• Y-splitters with ball valves. They let you run two lines from one spigot. Check that both ends are 3/4-11.5 GHT.
• High-flow washers. A larger opening helps pressure at long runs without changing the size of garden hose thread.
• Drinking-water-safe washers and hoses. For RVs or filling pet bowls, look for NSF-61 compliant gear.

Small, proven upgrades prevent leaks and reduce hassle during peak watering season.

Quick Specs and Practical Flow Tips

You can get better water flow without changing the size of garden hose thread. Focus on hose bore and run length.

• Hose inside diameter. 5/8 inch is the sweet spot for most homes. Use 3/4 inch for long runs or high-flow tools.
• Hose length. Shorter runs hold pressure better. Use a heavy-duty 50-foot hose rather than a light 100-foot hose if you can.
• Washers and screens. Keep screens clear at sprayers and timers. Dirt acts like a valve half shut.
• Pressure. Typical home pressure is 40 to 60 psi. Timers and filters can drop that. Plan for it.

These tips honor the fixed size of garden hose thread while tuning the system around it.

Frequently Asked Questions of size of garden hose thread

Is garden hose thread the same as 3/4 pipe thread?

No. 3/4 GHT is straight thread at 11.5 TPI and seals with a washer. 3/4 NPT is tapered at 14 TPI and seals on the threads.

What is the outside diameter of a 3/4 GHT male end?

It is about 1.0625 inches, or 1-1/16 inches. That is a fast way to verify the size of garden hose thread on a spigot.

Do I need Teflon tape on garden hose threads?

No. GHT seals at the washer inside the female fitting. Tape will not fix a bad washer and can cause mis-seating.

Can I connect a U.K. hose to a U.S. spigot?

Not directly. U.K. hoses often use BSP threads. Use a BSP-to-GHT adapter to bridge the size of garden hose thread difference.

Why does my hose leak at the faucet?

Most leaks come from a worn or missing washer. Replace the washer and hand-tighten; if it still leaks, check for cross-threading or a bent fitting.

Are all garden hoses the same thread size?

In the U.S., yes, most use 3/4-11.5 GHT. Hose inner diameters vary, but the thread size of garden hose thread is usually the same.

How do I measure threads per inch without a gauge?

Use a ruler and count thread peaks over one inch. You should find 11.5 TPI for standard 3/4 GHT.

Conclusion

The everyday standard for U.S. yard gear is simple: 3/4-11.5 GHT with a flat washer seal. Know this, and the size of garden hose thread will never trip you up again. Measure once, choose the right adapter, and swap washers before they fail.

Put this guide to work today. Check your spigot, replace worn washers, and label adapters so setup is fast next season. Want more practical tips like this? Subscribe for hands-on guides, or drop a question in the comments so I can help with your setup.