How do you winterise an outdoor garden tap?

To winterise an outdoor tap, disconnect all garden hoses, shut off the dedicated isolation valve, and fully open the tap to drain trapped water. Once drained, fit a closed-cell foam insulator or thermal tap jacket over the tap body, securing it tightly against the exterior wall to block freezing air.

What Australian standard covers frost protection for water pipes?

Plumbing frost protection is governed by AS/NZS 3500.1:2021 Water Services, Clause 5.8, which mandates insulation or frost-free valves in alpine and sub-zero regions. Compliance ensures that external piping and fixtures maintain structural integrity, preventing costly splits, backflow failure, and burst supply lines during severe seasonal cold snaps.

Why do outdoor taps burst during cold weather?

Outdoor taps burst because water expands by roughly nine percent as it freezes into ice inside copper pipes and brass fittings. This expansion causes extreme hydraulic pressure between the ice blockage and the closed tap valve, rupturing the brass casting or splitting adjacent copper pipework.

Do you need to insulate taps in Australia?

Tap insulation is essential in frost-prone Australian regions, including the ACT, Southern Highlands, Central Tablelands, Victorian high country, and parts of Tasmania. Properties in these zones regularly experience sub-zero overnight temperatures where uninsulated, static water lines freeze quickly, leading to split pipes and extensive structural water leaks.

What is the best material for insulating an outdoor tap?

Expanded polystyrene tap jackets and closed-cell polyethylene foam covers deliver the most reliable thermal protection for external fittings. Avoid open-cell fabrics, standard towels, or porous cardboard; these absorb ambient moisture and rain, which freezes solid against the brass tap body and accelerates catastrophic frost cracking.

What happens if you leave a garden hose connected in winter?

Leaving a garden hose connected prevents water inside the tap body from draining away, creating a direct conduit for sub-zero temperatures. Ice expands backwards from the hose nozzle straight into the tap bonnet and internal washer, virtually guaranteeing a cracked brass casting or ruptured wall elbow.

How to Winterise Outdoor Taps

Learn how to winterise outdoor taps across Australia. Prevent burst pipes and frost damage by isolating, draining, and insulating external brass tapware.

Quick answer

Winterising an outdoor tap requires disconnecting garden hoses, shutting off the supply isolation valve, and opening the tap to purge trapped water. Fitting a waterproof closed-cell foam cover protects exposed brass fittings from sub-zero expansion cracking, complying with AS/NZS 3500.1 frost mitigation standards in cold-climate regions.

Skill level: Beginner
Time: 30 minutes - 1 hour per tap
Trade: Plumbing
Updated: 4 November 2026

Tools you will need

Bahco 8072 - 250mm Adjustable Wrench
Knipex 87 01 250 Cobra - Water Pump Pliers
Thermotec Nu-Wrap - Closed-Cell Polyethylene Pipe Insulation
Kinco Brass Stop Tap Key - Valve Isolator Tool
Nylex Heavy-Duty - Hose End Cap
Gorilla 48mm All-Weather - Waterproof Duct Tape
Crescent 150mm Flathead - Cabinet Screwdriver

Why is winterising outdoor taps important for Australian properties?

This guide provides a comprehensive approach to winterising outdoor taps in Australia, focusing on preventing damage from freezing temperatures. While not all regions experience severe frosts, taking these precautions can save you from costly repairs and water wastage. This process involves isolating the water supply, draining the tap, and protecting it from the elements.

What skill level is required to winterise outdoor taps in Australia?

Beginner — Estimated time: 30 minutes - 1 hour per tap

What specific tools are required to winterise an outdoor tap?

Adjustable Wrench or Spanner Set: For turning isolation valves and potentially removing tap handles. Flathead Screwdriver: For some tap handle removal or stopcock operation. Bucket or Container: To catch residual water. Old Towel or Rag: For wiping and drying. Wire Brush (optional): To clean threads if applying thread tape. Hose End Cap (optional): To seal the tap outlet. Insulating Material: Foam tap cover, old towels, or purpose-built insulation. Zip Ties or Strong String: To secure insulation.

What materials are needed for effective outdoor tap winterisation?

PTFE Thread Seal Tape (Plumber's Tape): If any connections need re-sealing. Grease/Lubricant (Silicone-based): For tap spindles if disassembling. Hose End Cap (optional): 20mm or 25mm to match tap outlet. Outdoor Tap Cover/Insulator: Foam or fabric, readily available at hardware stores.

What safety precautions must be observed when winterising outdoor taps?

⚠️ Always ensure the main water supply is turned off before attempting any significant plumbing work. ⚠️ Be aware of electrical outlets or wiring near outdoor taps, especially if using water. ⚠️ Wear appropriate personal protective equipment (PPE) such as gloves to protect hands. ⚠️ If working at height (e.g., on a ladder for taps located higher up), ensure the ladder is stable and secure. ⚠️ Plumbing work in Australia must be performed by a licensed plumber. This guide explains the process and helps you select the right tools and materials. 🔒 Licensing: For any new installations, repairs beyond basic maintenance, or work involving mains water supply, a licensed plumber must be engaged. Refer to your state's licensing body (e.g., NSW Fair Trading, VIC VBA, QLD QBCC, WA Building Commission).

Step-by-Step Guide

Step 1: 1️⃣ Locate and Isolate Water Supply

The first crucial step is to cut off the water supply to the outdoor tap.

Identify the Isolation Valve: Most outdoor taps will have a dedicated isolation valve (stopcock) located either directly behind the tap, further along the pipe leading to it, or sometimes near the main water meter. This valve typically has a handle that turns 90 degrees or multiple rotations. Turn Off the Valve: Using your adjustable wrench or flathead screwdriver (depending on the valve type), turn the valve clockwise until it is fully closed. Verify Isolation: Turn the outdoor tap on fully. No water should flow out. If water still flows, the isolation valve is either not fully closed, or you've turned off the wrong valve. Double-check.

Step 2: 2️⃣ Drain the Outdoor Tap

Once the water supply is isolated, you need to remove any water remaining in the pipework and the tap itself to prevent it from freezing and expanding.
Open the Tap Fully: With the isolation valve closed, open the outdoor tap fully (both hot and cold, if applicable). This allows any trapped water to drain out. Collect Residual Water: Place a bucket or container underneath the tap to catch any water that drains out. You might hear a gurgling sound as air enters the pipe and water exits. Allow to Drain: Let the tap remain open for a few minutes to ensure all water has drained.

Step 3: 3️⃣ Disconnect Hoses and Attachments

Any hoses, irrigation timers, or other attachments connected to the outdoor tap should be removed.

Unscrew Attachments: Carefully unscrew any hoses or devices from the tap outlet. Drain Hoses: Ensure hoses are also drained and stored away, as water left inside them can also freeze and cause damage. Clean Threads (Optional): If you notice any debris or corrosion on the tap's threads, use a wire brush to gently clean them.

Step 4: 4️⃣ Insulate the Tap

Protecting the tap from direct exposure to freezing air is vital.
Choose Insulation: Use a purpose-built foam tap cover, an old towel, or rags. Wrap the Tap: Thoroughly wrap the entire tap body, including the spout and handle, with your chosen insulating material. Ensure there are no gaps where cold air can penetrate. Secure Insulation: Use zip ties, strong string, or even duct tape to firmly secure the insulation in place. It needs to stay put through wind and weather. 💡 Pro Tip: For extra protection, you can also insulate a short section of the pipe leading to the tap, especially if it's exposed.

Step 5: 5️⃣ Consider a Hose End Cap (Optional)

While not strictly necessary if the tap is fully drained and insulated, a hose end cap can provide an extra layer of protection.
Screw on Cap: If you have a 20mm or 25mm hose end cap, screw it onto the tap outlet. This helps prevent moisture ingress and provides a slight air gap. Do Not Overtighten: Hand-tighten only to avoid damaging the tap threads.

Step 6: 6️⃣ Final Check and Maintenance

Before leaving the tap for the winter, perform a final check.
Verify Insulation: Ensure the insulation is secure and covers all vulnerable parts of the tap. Tap Position: Leave the tap in the "open" position. This allows any residual moisture to evaporate and prevents pressure build-up if the isolation valve were to leak slightly. Lubricate Spindle (Optional): If you've disassembled the tap handle, apply a small amount of silicone-based grease to the spindle threads before reassembling to ensure smooth operation next season.

Common Mistakes to Avoid

1.Forgetting to Drain: Simply turning off the isolation valve without opening the tap to drain the residual water is the most common mistake, leading to frozen pipes.

2.Inadequate Insulation: Using too little or poorly secured insulation that falls off or doesn't cover the entire tap.

3.Leaving Hoses Connected: Water trapped in hoses can freeze, expand, and damage both the hose and the tap connection.

4.Not Isolating Water Supply: Attempting to insulate or work on a tap without first turning off its water supply can lead to leaks or bursts.

5.Overtightening Connections: When reattaching hoses or caps, overtightening can strip threads or damage washers, leading to leaks.

Pro Tips

💡 Install Frost-Free Taps: If you're replacing an outdoor tap, consider installing a "frost-free" or "anti-siphon" tap. These are designed to drain water back into the heated part of your home's plumbing, making winterisation easier. 💡 Check for Leaks: Before winterising, check your outdoor taps for any drips or leaks. Repairing these now will prevent potential issues and water waste. 💡 Mark Isolation Valves: Clearly label your outdoor tap isolation valves so they are easy to find next winter. 💡 Consider a Main Shut-Off: If you have multiple outdoor taps and no individual isolation valves, consider turning off your home's main water supply and draining the entire system if you're going away for an extended period in a cold climate. 💡 Water Efficiency: Regularly check outdoor taps for leaks, as even a slow drip can waste thousands of litres of water annually. WELS star ratings primarily apply to indoor fixtures, but efficient outdoor practices are key to water conservation.

Recommended Tools
Bahco 8071 Adjustable Wrench: A reliable and durable wrench for various plumbing tasks. Stanley FatMax Screwdriver Set: Essential for many tap and valve operations. Kinetic Foam Tap Cover: Specifically designed for outdoor tap insulation, easy to install.

Philmac Thread Seal Tape: High-quality PTFE tape for ensuring watertight connections.

Frequently asked questions

How do you winterise an outdoor garden tap?: To winterise an outdoor tap, disconnect all garden hoses, shut off the dedicated isolation valve, and fully open the tap to drain trapped water. Once drained, fit a closed-cell foam insulator or thermal tap jacket over the tap body, securing it tightly against the exterior wall to block freezing air.
What Australian standard covers frost protection for water pipes?: Plumbing frost protection is governed by AS/NZS 3500.1:2021 Water Services, Clause 5.8, which mandates insulation or frost-free valves in alpine and sub-zero regions. Compliance ensures that external piping and fixtures maintain structural integrity, preventing costly splits, backflow failure, and burst supply lines during severe seasonal cold snaps.
Why do outdoor taps burst during cold weather?: Outdoor taps burst because water expands by roughly nine percent as it freezes into ice inside copper pipes and brass fittings. This expansion causes extreme hydraulic pressure between the ice blockage and the closed tap valve, rupturing the brass casting or splitting adjacent copper pipework.
Do you need to insulate taps in Australia?: Tap insulation is essential in frost-prone Australian regions, including the ACT, Southern Highlands, Central Tablelands, Victorian high country, and parts of Tasmania. Properties in these zones regularly experience sub-zero overnight temperatures where uninsulated, static water lines freeze quickly, leading to split pipes and extensive structural water leaks.
What is the best material for insulating an outdoor tap?: Expanded polystyrene tap jackets and closed-cell polyethylene foam covers deliver the most reliable thermal protection for external fittings. Avoid open-cell fabrics, standard towels, or porous cardboard; these absorb ambient moisture and rain, which freezes solid against the brass tap body and accelerates catastrophic frost cracking.
What happens if you leave a garden hose connected in winter?: Leaving a garden hose connected prevents water inside the tap body from draining away, creating a direct conduit for sub-zero temperatures. Ice expands backwards from the hose nozzle straight into the tap bonnet and internal washer, virtually guaranteeing a cracked brass casting or ruptured wall elbow.

Written by Pipey, the Plumbing specialist at Aus.Tools.