How To Winterize An Outdoor Shower – Protect Your Plumbing

ByEric James Updated on

The crisp air of autumn brings stunning foliage, but it also signals a critical task for outdoor enthusiasts: preparing your gear for colder months. Neglecting your outdoor shower can lead to burst pipes and costly repairs. Water expands when it freezes, and even a small amount trapped in your lines can cause significant damage.

Imagine waking up to a burst pipe because of a sudden overnight freeze. This common headache is entirely preventable with a few simple steps. Protecting your investment ensures it’s ready for refreshing use come spring.

This guide will walk you through exactly how to winterize an outdoor shower, whether it’s a simple camp setup or a more permanent backyard fixture. You’ll learn to safeguard your outdoor plumbing, extend its lifespan, and avoid winter woes, living outdoors smarter and more confidently.

Understanding the Threat: Why Winterizing Matters for Outdoor Showers

Outdoor showers are a fantastic amenity for campers, homesteaders, and anyone who loves refreshing off-grid hygiene. However, they are also highly vulnerable to the cold.

When temperatures drop below freezing, any water left in pipes, showerheads, or faucets will turn to ice. As water freezes, it expands with immense force.

This expansion can easily rupture pipes, crack fittings, and damage valves. The resulting damage can be expensive to repair and lead to significant water leaks when the system is reactivated in warmer weather.

Proper plumbing winterization is not just about convenience; it’s about protecting your investment. Ignoring the threat of freezing temperatures is a gamble you don’t want to lose.

Essential Tools and Supplies for Outdoor Shower Winterization

Before you begin the process of winterizing your outdoor shower, gather your supplies. Having everything on hand makes the job smoother and more efficient.

Here’s a checklist of what you might need:

  • Adjustable Wrench or Pliers: For disconnecting hoses and tightening caps.
  • Garden Hose: To help drain the system.
  • Air Compressor (Optional but Recommended): For blowing out water lines. Ensure it has a blow-out plug adapter.
  • RV Antifreeze (Non-Toxic, Propylene Glycol-Based): Essential for protecting drain traps and certain components.
  • Rags or Towels: For wiping up spills and drying components.
  • Bucket: To catch any residual water.
  • Pipe Insulation or Foam Sleeves: For added cold weather protection, especially on exposed pipes.
  • Thread Seal Tape (Teflon Tape): For re-sealing connections in the spring.
  • Small Brush: For cleaning out any debris before storage.

Having these tools ready will ensure you can complete the winterization process effectively and safely.

Step-by-Step Guide: How to Winterize an Outdoor Shower System

The core principle of winterizing is to remove all water from the system. Follow these steps carefully to ensure thorough protection against freezing damage.

1. Shut Off the Water Supply

This is the crucial first step. Locate the main shut-off valve for your outdoor shower’s water line. It might be near the main house connection, a spigot, or a dedicated valve for the shower itself.

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Turn it completely off. If your shower has both hot and cold lines, ensure both are shut down.

2. Disconnect Hoses and Attachments

Remove any garden hoses, showerheads, or handheld sprayers from the system. Drain them thoroughly and store them indoors in a dry, protected area.

Leaving hoses connected can trap water and cause damage to the hose itself or the faucet connection.

3. Open All Faucets and Valves

With the water supply off, open both the hot and cold handles on your outdoor shower faucet. This releases any pressure in the lines and allows water to start draining out.

If your system has a separate drain valve, open that as well.

4. Drain the Water Lines

Gravity will do some of the work, but you need to ensure complete drainage. If your outdoor shower has a low-point drain or a dedicated winterizing valve, open it.

Allow all water to flow out until it stops. You might hear gurgling as air enters the system.

5. Blow Out the Lines (Optional but Recommended)

For maximum protection, especially in areas with extreme cold, use an air compressor. Attach a blow-out plug adapter to the main water inlet for your outdoor shower.

Set the compressor to a low PSI (around 20-30 PSI) to avoid damaging pipes. Briefly open each shower handle (hot and cold) one at a time to force any remaining water out.

Repeat this process a few times until only air comes out. This step is critical for comprehensive water line winterizing.

6. Protect the Drain Trap (If Applicable)

If your outdoor shower has a P-trap (like an indoor sink) to prevent odors, you’ll need to protect it. After draining, pour about one cup of non-toxic RV antifreeze into the shower drain.

This antifreeze will settle in the trap, preventing any residual water from freezing and cracking the pipe. Do NOT use automotive antifreeze; it is toxic.

7. Insulate Exposed Pipes and Faucets

Even after draining, exposed pipes and the frost-proof faucet itself can benefit from extra protection. Wrap any visible pipes with foam pipe insulation sleeves.

Secure the insulation with zip ties or electrical tape. Consider a faucet cover for the shower head and handles. This extra layer of insulation materials provides crucial cold weather protection.

8. Disconnect and Store Portable Units

For portable outdoor showers (like those used with an outdoor rustic shower setup or for RVs), the process is simpler. Drain the tank completely, disconnect the pump and showerhead, and ensure all water is expelled.

Store the unit in a garage, shed, or indoors where it won’t be exposed to freezing temperatures. This also applies to any outdoor shower ideas that are temporary or modular.

Winterizing Specific Outdoor Shower Types

While the basic principles remain, different outdoor shower setups require slightly varied approaches.

Permanent Plumbed Outdoor Showers

These are often integrated into a home’s plumbing system. Ensure you know the location of all shut-off valves, including any dedicated to the outdoor line.

The blowing out method with an air compressor is highly recommended for these systems to clear long runs of pipe. Consider installing a freeze protection valve in the future for automatic drainage.

RV and Campervan Outdoor Showers

RV outdoor showers are part of a larger system. The process typically involves draining the fresh water tank, hot water heater, and then using an air compressor or pumping RV antifreeze through the lines.

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Refer to your RV’s specific winterization guide, as it will cover the entire RV winterization with antifreeze process, which includes the outdoor shower. Always use non-toxic RV antifreeze.

Portable Camp Showers and Solar Showers

These are the easiest to winterize. Simply empty all water from the bag or tank. Disconnect the hose and showerhead, and ensure no water remains in the pump mechanism.

Clean and dry all components thoroughly before storing them indoors. This prevents mold and mildew as well as freezing damage.

Common Mistakes to Avoid When Preparing for Freezing Temperatures

Even experienced adventurers can make oversights. Be mindful of these common pitfalls:

  • Forgetting a Drain Valve: Some outdoor plumbing systems have multiple drain points. Missing even one can lead to trapped water.
  • Not Completely Draining: Just turning off the water isn’t enough. You must actively open faucets and use gravity or air pressure to force water out.
  • Using Automotive Antifreeze: This is highly toxic and should never be used in a potable water system. Stick to RV-specific, non-toxic antifreeze.
  • Ignoring the Showerhead: Water can remain trapped in the showerhead or handheld sprayer. Disconnect and drain these components.
  • Waiting Too Long: Don’t wait for the first hard freeze. Winterize your outdoor shower as soon as consistent overnight temperatures dip near freezing.

Learning how to winterize an outdoor shower correctly means being thorough and proactive. A small effort now saves a huge headache later.

Beyond the Basics: Advanced Tips for Cold Weather Protection

For those in extremely cold climates or seeking extra peace of mind, consider these advanced strategies for your outdoor plumbing.

Install a Freeze Protection Valve

A freeze protection valve is a specialized valve that automatically opens and drains water when temperatures drop to a pre-set level. These are often used on outdoor faucets or water heaters.

While they don’t replace full winterization, they offer an excellent safeguard against unexpected cold snaps or missed steps.

Utilize Heat Cables

For outdoor plumbing that absolutely cannot be drained (e.g., if it’s integrated into a complex system), heat cables can be an option. These electric cables wrap around pipes and turn on automatically when temperatures drop, preventing freezing.

They require a reliable power source and careful installation. This is a more complex solution for outdoor plumbing.

Consider Permanent Pipe Insulation Upgrades

Beyond foam sleeves, consider more robust, permanent insulation for your outdoor water lines. This could include burying pipes below the frost line, using spray foam insulation in enclosures, or installing higher-grade insulation materials.

These measures contribute significantly to year-round cold weather protection.

Outdoor Shower Winterizing Checklist

Use this checklist to ensure you’ve covered all your bases when preparing your outdoor shower for winter.

  1. Shut Off Water Supply: Turn off both hot and cold lines at the source.

  2. Disconnect Hoses & Attachments: Remove showerheads, sprayers, and garden hoses; drain and store indoors.

  3. Open All Faucets/Valves: Open hot and cold handles on the shower and any dedicated drain valves.

  4. Drain Lines: Allow all water to gravity drain from the system, opening low-point drains if available.

  5. Blow Out Lines (Recommended): Use an air compressor at low PSI to force remaining water out of each line.

  6. Add RV Antifreeze to Trap: Pour 1 cup of non-toxic RV antifreeze into the shower drain if it has a P-trap.

  7. Insulate Exposed Components: Wrap pipes and cover the frost-proof faucet with insulation or covers.

  8. Store Portable Units: For portable showers, drain completely, dry, and store indoors.

  9. Inspect for Leaks: Double-check all connections and components for any signs of wear or potential issues for next season.

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Following this checklist will help you confidently prepare your outdoor shower for the harshest winter conditions.

Frequently Asked Questions About Winterizing Outdoor Showers

Do I need to use antifreeze to winterize my outdoor shower?

You only need antifreeze for the drain trap if your shower has one. For the water lines themselves, thorough draining and blowing out with an air compressor is generally sufficient and preferred. Antifreeze is primarily for protecting P-traps where water cannot be completely removed.

What happens if I forget to winterize my outdoor shower?

If temperatures drop below freezing, any water remaining in the pipes will expand as it turns to ice. This can cause pipes to burst, fittings to crack, and the showerhead or faucet to be damaged. You’ll likely face costly repairs in the spring.

How early in the season should I winterize my outdoor shower?

It’s best to winterize your outdoor shower before the first hard freeze is expected. As soon as consistent overnight temperatures begin to dip near freezing (around 32°F or 0°C), it’s time to take action. Don’t wait until it’s too late.

Can I just cover my outdoor shower for winter?

Covering your outdoor shower offers some protection from snow and ice, but it does not prevent the water inside the pipes from freezing. It’s crucial to drain all water from the system, even if you plan to cover the structure. Insulation can help, but drainage is key.

Is it safe to use a regular shop vacuum to blow out the lines?

While some people attempt to use a shop vacuum in reverse (blower mode), it’s generally not recommended. Shop vacuums don’t provide consistent, controlled air pressure like an air compressor, and they can introduce moisture into the lines, which is counterproductive. An air compressor with a proper adapter is safer and more effective.

Taking the time to properly winterize your outdoor shower is an essential part of responsible outdoor living and homesteading. It safeguards your equipment and ensures a smooth start to your outdoor adventures next spring.

By following these steps, you’re not just protecting pipes; you’re cultivating a smarter, more self-sufficient lifestyle. Stay safe, stay comfortable, and prepare for confident exploration!

Eric James
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