---
product_id: 4254532
title: "Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031"
brand: "orbit"
price: "A$59"
currency: AUD
in_stock: true
reviews_count: 10
url: https://www.desertcart.com.au/products/4254532-orbit-brass-quick-coupler-key-for-3-4-inch-valves
store_origin: AU
region: Australia
---

# Watertight O-ring seal 3/4-inch MPT/FPT thread compatibility Durable brass body & lid Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031

**Brand:** orbit
**Price:** A$59
**Availability:** ✅ In Stock

## Summary

> 💦 Unlock your landscape’s potential with the Orbit Quick Coupler!

## Quick Answers

- **What is this?** Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 by orbit
- **How much does it cost?** A$59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/4254532-orbit-brass-quick-coupler-key-for-3-4-inch-valves)

## Best For

- orbit enthusiasts

## Why This Product

- Trusted orbit brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak-Proof Precision:** Replaceable O-rings ensure a perfect watertight seal every time.
- • **Ergonomic Double Lug Key:** Brass and steel key design offers secure grip and smooth valve operation.
- • **Effortless Landscape Access:** Quickly connect to pressurized lines anywhere with ease and confidence.
- • **Built to Last Brass Durability:** Premium brass construction resists debris and corrosion for long-term reliability.
- • **Versatile Thread Compatibility:** Fits standard 3/4-inch MPT and FPT fittings for seamless integration.

## Overview

The Orbit 51031 Brass Quick Coupler Sprinkler Key is a robust irrigation tool designed for fast, secure connections to pressurized water lines. Crafted from durable brass with watertight O-rings and compatible with standard 3/4-inch fittings, it ensures reliable outdoor watering access for residential and commercial landscapes alike.

## Description

The Orbit 51031 is a brass quick-coupler key designed to activate a compatible underground quick-coupler irrigation valve. Insert the key into the valve and turn clockwise to open the water supply; turn counterclockwise to close it. The key is designed for use with the Orbit 51029 3/4-inch brass quick-coupler valve. Compatibility with quick-coupler valves from other manufacturers can vary and is not guaranteed, so customers should verify the existing valve type and connection before ordering. The key has a dual-threaded outlet that accepts a 1/2-inch male pipe-threaded accessory through its 1/2-inch female pipe thread, or a 3/4-inch female pipe-threaded accessory through its 3/4-inch male pipe thread. A separate adapter is required to connect the key to standard garden-hose thread. Package contains one Orbit 51031 quick-coupler key only. Quick-coupler valve, sprinkler, hose adapter, hose, and other fittings are not included. For outdoor irrigation use with cold water only.

Review: This Key works as good as any other Sprinkler Key. - As good as the more expensive coupler Sprinkler Keys.
Review: Quality Product. You need a hose valve also! - This is a superior quality product. Solid Brass. Should last for years. The 3/4 inch thread is intended to attach to a 3/4 inch female hose faucet. It is also threaded for a male 1/2 inch faucet. The unit does not attach to a hose by itself! See my picture for details.

## Features

- COMPATIBILITY: Designed for use with Orbit 3/4-inch brass quick-coupler valves, including the Orbit 51029 valve; fit with valves from other manufacturers is not guaranteed.
- DUAL-THREADED OUTLET: The outlet provides a 1/2-inch female pipe thread and a 3/4-inch male pipe thread for connecting compatible threaded sprinklers, fittings, or adapters.
- VERIFY BEFORE ORDERING: “3/4-inch” identifies the compatible quick-coupler valve size and the male outlet thread; compare the valve connection and outlet thread requirements before purchase.
- KEY ONLY: Package includes one Orbit 51031 brass quick-coupler key. Quick-coupler valve, hose adapter, sprinkler, hose, and other fittings are sold separately.
- OPERATION AND USE: Insert the key into a compatible quick-coupler valve and turn clockwise to activate the water supply; turn counterclockwise to shut off. Intended for outdoor irrigation with cold water only.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000VYB04U |
| Best Sellers Rank | #57,529 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #354 in Automatic Irrigation Accessories |
| Brand | Orbit |
| Brand Name | Orbit |
| Customer Reviews | 4.5 out of 5 stars 537 Reviews |
| Exterior Finish | Brass |
| Global Trade Identification Number | 00046878510319 |
| Included Components | Quick Coupler and Lever |
| Inlet Connection Size | 0.75 inches |
| Inlet Connection Type | Female Iron Pipe |
| Item Dimensions | 1.75 x 1 x 6 inches |
| Item Type Name | Watering Equipment Tool |
| Item Weight | 12.8 ounces |
| Item dimensions L x W x H | 1.75 x 1 x 6 inches |
| Manufacturer | Orbit |
| Manufacturer Part Number | 51031 |
| Material | Brass |
| Material Type | Brass |
| Model Number | 51031 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.75 inches |
| Outlet Connection Type | MNPT |
| Size | 3/4 inches |
| Thread Size | 3/4 inches |
| Thread Type | Pipe Thread |
| UPC | 046878510319 |
| Unit Count | 1 Count |
| Valve Type | Quick Coupler |

## Product Details

- **Material:** Brass
- **Brand:** Orbit
- **Item dimensions L x W x H:** 3 x 1 x 10.13 inches
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 0.75 Inches
- **Inlet Connection Type:** Female Iron Pipe
- **Outlet Connection Type:** MPT
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.75 Inches
- **Global Trade Identification Number:** 00046878510319

## Images

![Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 - Image 1](https://m.media-amazon.com/images/I/510jT7gSpfL.jpg)
![Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 - Image 2](https://m.media-amazon.com/images/I/71nfc-H1esL.jpg)
![Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 - Image 3](https://m.media-amazon.com/images/I/71GgfrvVcAL.jpg)
![Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 - Image 4](https://m.media-amazon.com/images/I/71qzqiASBQL.jpg)
![Orbit Brass Quick Coupler Key for 3/4-Inch Valves, Key Only - 51031 - Image 5](https://m.media-amazon.com/images/I/61o2eYv9sqL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This Key works as good as any other Sprinkler Key.
*by A***R on November 3, 2025*

As good as the more expensive coupler Sprinkler Keys.

### ⭐⭐⭐⭐⭐ Quality Product. You need a hose valve also!
*by D***L on September 29, 2024*

This is a superior quality product. Solid Brass. Should last for years. The 3/4 inch thread is intended to attach to a 3/4 inch female hose faucet. It is also threaded for a male 1/2 inch faucet. The unit does not attach to a hose by itself! See my picture for details.

### ⭐⭐⭐⭐⭐ Worked like a charm
*by D***V on November 12, 2025*

Worked like a charm to connect to a Turfgro 3/4 inch Quick Coupler Valve to do a sprinkler winterizarion. Prefer this model because of the removable T bar. Our valve is in a casing too narrow to use the T bar, so if it was permanently fixed, it wouldn’t work for us.

## Frequently Bought Together

- Orbit WaterMaster Underground 51031 3/4-Inch Brass Quick Coupler Key
- Orbit WaterMaster Underground 51029 3/4-Inch Brass Quick Coupler Valve
- Eastman Bent Nose Garden Hose Valve, 3/4 Inch FIP x 3/4 Inch MHT, Brass Plumbing Fitting, 20253

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**Shop now:** [https://www.desertcart.com.au/products/4254532-orbit-brass-quick-coupler-key-for-3-4-inch-valves](https://www.desertcart.com.au/products/4254532-orbit-brass-quick-coupler-key-for-3-4-inch-valves)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-09-01*