Garden Hose Threads What Size

Introduction

Making the right kind of connections is essential when it comes to getting your garden hose up and running as soon as possible. There are many types and sizes of threads out there, and finding the right type for your garden hose will depend on several factors. Knowing the right type and size of threads when shopping for a garden hose can help you avoid hours of hassle and guesswork. In this article, we'll cover the different types of garden hose thread sizes, from British Standard Pipe to National Pipe Threads, and explain how to identify the kind you need and how to identify the thread sizes correctly.

British Standard Pipe (BSP)

British Standard Pipe, or BSP, is a standard commonly used for garden hoses in the UK. This is measured in threads per inch (TPI) of the size of the ends of the garden hose. BSP usually comes in sizes of 1/2, 11/16, 3/4, or 1 depending on the size of the garden hose.

Popular BSP Subtopics

BSP Thread Geometry

The geometry of a BSP thread typically follows the UK taper thread standard. This standard dictates that as you move along the thread axis, the internal diameter of the connector reduces when going across the thread.

BSP Thread Replacement

If you find that the BSP thread on your garden hose end needs to be replaced, then you can usually find the correct size of threads fairly easily. The most common sizes of BSP thread are 1/2, 11/16, 3/4, and 1. These are the most common sizes for garden hoses, but depending on the size of your garden hose, the thread size can vary.

BSP Thread Sealing

When sealing your connection, it's important to use the correct type of sealant. The most commonly used type of sealant for BSP connections is PTFE tape. This tape is designed to create a watertight seal and should be wrapped around the threads several times before connecting.

National Pipe Thread (NPT)

National Pipe Thread, or NPT, is a standard commonly used in the US. It is also measured in threads per inch (TPI) and is slightly tapered onto the internal diameter of the connector. The most common sizes of NPT for garden hoses are usually 1/2, 3/4, 1, or 1-1/2.

Popular NPT Subtopics

NPT Thread Geometry

The geometry of the NPT thread typically follows the American standard of a straight thread for a specified length followed by a small area of taper. This standard dictates that as you move along the thread axis, the internal diameter of the connector reduces when going across the thread.

NPT Thread Replacement

If you need to replace the NPT threads on your garden hose, then most hardware stores will have the correct NPT connectors. The most common sizes of NPT thread for a garden hose are 1/2, 3/4, 1, or 1-1/2.

NPT Thread Sealing

Similar to a BSP connection, a PTFE tape should be applied to the NPT threads when connecting. This tape should be wrapped around the threads several times to ensure a watertight seal.

Summary

Making the right connection is very important when it comes to garden hoses. Knowing the different types, sizes, and geometry of the threads is essential for making sure you have the right connection. The two most commonly used standards for garden hoses are British Standard Pipe (BSP) and National Pipe Thread (NPT). BSP typically comes in sizes of 1/2, 11/16, 3/4, or 1 and NPT typically comes in 1/2, 3/4, 1, or 1-1/2. To ensure awatertight seal, it is also important to use the correct sealant, such as PTFE tape. With the right type and size of threads, you can avoid hours of hassle and guesswork.