The standard garden hose thread size in North America is 3/4 inch Garden Hose Thread (3/4" GHT), specified as 3/4"–11.5 NH (or NHR).

Quick Scoop: What Size Is Garden Hose Thread?

For typical home outdoor faucets, hoses, and nozzles, the thread you’re dealing with is 3/4" GHT (Garden Hose Thread). This is a straight (not tapered) thread that seals with a rubber washer rather than pipe tape.

In practical terms: if you buy any normal garden hose, spray nozzle, or Y-splitter in a North American hardware store, it’s almost certainly 3/4" GHT on the threaded ends.

Key Facts (Fast Answers)

  • Standard garden hose thread: 3/4" GHT (3/4"–11.5 NH).
  • “GHT” = Garden Hose Thread, used on outdoor spigots, hose ends, and hose accessories.
  • Hose inside diameter (like 1/2", 5/8", 3/4") is different from the thread size ; most still use 3/4" GHT fittings.
  • GHT threads are straight , so sealing is done with a flat washer, not by taper.
  • US pipe thread (NPT) is not the same and doesn’t reliably interchange with GHT.

Mini Sections

1. Why It’s Almost Always 3/4" GHT

Most residential outdoor watering gear is standardized so everything “just fits” together. To make that happen, manufacturers use:

  • Connector spec: 3/4" GHT, 11.5 threads per inch (TPI).
  • Use case: garden spigots, hoses, sprinklers, nozzles, quick-connects, and Y-splitters in North America.

That’s why when someone on a tool or DIY forum asks, “What thread is this garden hose?” the default answer is basically “standard 3/4 GHT.”

2. Hose Size vs Thread Size (Common Confusion)

You might see hoses marketed as:

  • 1/2" hose
  • 5/8" hose (most common residential)
  • 3/4" hose

Those numbers describe the hose’s internal diameter for water flow , not the threaded fitting size. Even those different diameter hoses almost always have 3/4" GHT threaded ends, so they all screw onto the same faucet or nozzle.

3. GHT vs NPT vs BSP (If You’re Matching Adapters)

If you’re buying adapters or mixing plumbing parts, these labels matter:

  • GHT (3/4"–11.5 NH) : Garden hose thread, straight, washer seal, North American outdoor watering standard.
  • NPT : National Pipe Thread, tapered, used for plumbing and industrial piping, not directly compatible with GHT without special adapters.
  • BSP : British Standard Pipe, common in UK/Europe; not the same as GHT or NPT.

This kind of “what size is garden hose thread” question shows up often in forums where people are trying to hook garden hoses to pumps, filters, or pipe fittings, and they discover the GHT vs NPT mismatch.

4. Simple Way to Check at Home

If you’re staring at a mystery hose or spigot and wondering what it is, a quick mental checklist:

  1. Is it a normal outdoor faucet or garden hose in the US/Canada?
    • Assume 3/4" GHT unless clearly labeled otherwise.
  1. Does it say 3/4"–11.5 NH or GHT on the fitting/packaging?
    • That confirms garden hose thread.
  1. If it threads into plumbing parts marked NPT and leaks or binds, you’re likely mixing GHT and NPT.

5. Why This Question Keeps Trending

This has become a small but persistent “trending” DIY topic because:

  • More people are connecting hoses to pressure washers, rain barrels, pumps, and drip systems, not just faucets.
  • Online marketplaces list confusing specs, mixing hose diameter, thread size, and pipe thread types.

So the phrase “what size is garden hose thread” keeps popping up in search and in forum discussions whenever someone hits that GHT vs NPT or adapter confusion.

HTML Table: Garden Hose Thread Basics

html

<table>
  <thead>
    <tr>
      <th>Type</th>
      <th>Nominal Size</th>
      <th>Thread Spec</th>
      <th>Where You See It</th>
      <th>Notes</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>GHT (Garden Hose Thread)</td>
      <td>3/4 inch</td>
      <td>3/4&quot;–11.5 NH / NHR</td>
      <td>Outdoor faucets, garden hoses, sprinklers, nozzles (North America)</td>
      <td>Straight thread, seals with flat washer, standard for hose connections</td>
    </tr>
    <tr>
      <td>NPT (National Pipe Thread)</td>
      <td>1/2–1 inch common for home</td>
      <td>Tapered pipe thread</td>
      <td>Household plumbing, pumps, rigid piping</td>
      <td>Not directly compatible with GHT; uses sealant or tape</td>
    </tr>
    <tr>
      <td>BSP (British Standard Pipe)</td>
      <td>Various sizes</td>
      <td>Parallel or tapered</td>
      <td>UK and many non‑US systems</td>
      <td>Different standard; requires matching BSP fittings or adapters</td>
    </tr>
  </tbody>
</table>

TL;DR

  • If you’re in North America and asking “what size is garden hose thread?” the answer you almost certainly need is:
    • 3/4" GHT, also written 3/4"–11.5 NH.

Information gathered from public forums or data available on the internet and portrayed here.