Caleb MorganBy Caleb Morgan

Updated November 2026

Garden hose thread size is almost always 3/4 inch, a standard known as GHT (garden hose thread). This guide explains what those numbers mean, how to confirm the size on your own hose or faucet, and how to match a replacement fitting so it threads on and seals correctly.

Understanding the 3/4-Inch GHT Standard

In the United States, the standard garden hose connection is 3/4 inch GHT. The “3/4 inch” refers to the nominal outside diameter of the threaded section, not the inside bore of the hose. The thread itself has 11.5 threads per inch and a 60-degree profile, which is why a fitting from one brand will usually work on another.

Shopping for one? See our guide: Zero-G Ultra Flexible Durable Garden Hose: 7 Best Picks Compared (2026).

Keep in mind that GHT is a thread form, not a pipe thread. A GHT fitting will not seal properly on a standard NPT pipe fitting, even though they may look similar.

How to Measure or Confirm Your Thread Size

Before buying any replacement part, confirm what you have. Most of the time the answer is 3/4 GHT, but older hardware or imported fittings occasionally differ.

  1. Unscrew the fitting from the hose or faucet and inspect the threads for a “GHT” or “3/4” marking.
  2. Measure the outside diameter of the male threads with calipers. A 3/4 GHT thread measures close to 0.84 inches across the crests.
  3. Count the threads over one inch. A standard GHT thread shows about 11 to 12 threads per inch.
  4. Check the faucet (hose bib) for the same markings. Many hose bibs use the same 3/4 GHT thread as the hose.

Matching Fittings and Adapters

When you need a connector, match thread type first, then size. A male GHT end must mate with a female GHT end. Mixing a 3/4 GHT with a 1/2-inch or NPT thread will leak or refuse to thread at all.

Connection type Typical use Compatible with GHT?
3/4 GHT Standard hoses, hose bibs, nozzles Yes (native)
1/2-inch NPT Pipe fittings, some sprinklers No, needs an adapter
Quick connect (3/4 GHT style) Fast-swap nozzles and sprinklers Yes, when marked GHT

If a fitting is labeled only “hose end,” assume it is 3/4 GHT unless the packaging says otherwise. For quick-disconnect parts, see Quick Connect for Garden Hose: How to Choose and Install One (Step-by-Step).

Sealing Threads Correctly

Even with a matching size, a poor seal causes drips. Wrap the male threads with PTFE tape in a clockwise direction (as you look at the end of the fitting) two to three times, then hand-tighten and add a quarter turn with pliers. Overtightening cracks plastic fittings.

For a full walkthrough, see Teflon Tape Garden Hose: How to Seal Threads Without Leaks. If you are replacing an entire end, Replace End of Garden Hose: 6 Best Repair Fittings Compared (2026) covers the options.

Common Mistakes

  • Assuming a 3/4 GHT fitting fits an NPT pipe, which will leak.
  • Measuring the inside diameter of the hose instead of the thread.
  • Using too much tape, which can prevent the threads from seating.
  • Skipping a rubber washer, which is a common cause of leaks at the coupling.
  • Overtightening plastic fittings by hand or with pliers.
  • Thread seal tape: Helps create a watertight seal on male threads before you connect a fitting. View on Amazon
  • Replacement rubber washers: Fill the gap between hose ends and faucets, the most frequent leak point. View on Amazon
  • Digital calipers: Give you an accurate outside-diameter reading when you are not sure of the thread size. View on Amazon

FAQ

What size are garden hose threads in the US?

Standard US garden hose threads are 3/4 inch GHT. Most hoses, faucets, and nozzles follow this size.

Can I use an NPT fitting on a garden hose?

Generally no. NPT and GHT are different thread forms, so they will not seal properly. Use a GHT-to-NPT adapter if you must connect the two.

How do I know if my hose uses GHT threads?

Check for markings such as “GHT” or “3/4,” or measure the outside diameter of the male thread, which should be close to 0.84 inches. If you are unsure, consult a plumbing supply professional before buying a replacement.

Conclusion

Garden hose thread size in the US is 3/4 inch GHT, a standard that makes most hoses and fittings interchangeable. Confirm the thread before you buy, seal the connection with tape, and avoid mixing GHT with pipe threads. With those steps, your connections should stay leak-free.

Ready to choose one?

Caleb Morgan

About Caleb Morgan

Caleb Morgan is part of our editorial team and reviews and edits our garden hand tools & equipment guides, checking product details against manufacturer specifications and owner feedback.