How To Drain An Outdoor Shower – Prevent Freezing & Extend Longevity
Picture this: you’ve just installed a fantastic outdoor shower, enjoying refreshing rinses under the open sky. But as the seasons change and colder weather approaches, a crucial question arises: how do you protect your investment from freezing pipes and costly damage? Ignoring this step can turn your blissful outdoor oasis into a burst plumbing nightmare.
Learning how to drain an outdoor shower properly is more than just a chore; it’s an essential skill for any outdoor enthusiast, homesteader, or RV owner looking to extend the life of their setup. Whether you have a permanent fixture in your backyard, a rustic camp shower, or a portable unit for your adventures, knowing the right drainage techniques ensures your system stays intact and ready for your next warm-weather use.
This guide will walk you through everything you need to know, from basic steps for simple setups to advanced winterization for more complex plumbing. We’ll cover essential tools, safety tips, and common pitfalls, ensuring you can confidently drain your outdoor shower and safeguard it against the elements.
Why Draining Your Outdoor Shower is Non-Negotiable
Draining an outdoor shower isn’t just about tidiness; it’s about protecting your investment and ensuring its longevity. Water left in pipes, especially in colder climates, expands when it freezes. This expansion can lead to burst pipes, cracked fixtures, and significant repair costs.
Beyond freezing, stagnant water can also create other problems. It can lead to mold and mildew growth, unpleasant odors, and even attract insects. Proper drainage is key to maintaining a hygienic and functional outdoor bathing experience for years to come.
Protecting Against Freeze Burst Prevention
The primary reason to drain your system is freeze burst prevention. Even a small amount of water in a pipe can exert immense pressure when it turns to ice. This pressure can easily exceed the pipe’s structural integrity, causing it to rupture.
This is particularly true for rigid PVC or copper plumbing systems. Flexible hoses are somewhat more forgiving but can still suffer damage or compromise connections. Don’t risk it; always plan to drain your lines before temperatures drop.
Mitigating Water Stagnation and Contamination
When water sits unused in pipes, especially in warm conditions, it can become a breeding ground for bacteria and algae. This is known as water stagnation. Draining your outdoor shower regularly prevents this buildup, ensuring that the water you use for your next shower is clean and fresh.
For those relying on well water or rainwater harvesting, this is even more crucial. Stagnant water can also leave behind mineral deposits, potentially clogging showerheads or slowing your RV shower drain over time.
Essential Tools and Materials for Draining Your Outdoor Shower
Before you begin the drainage process, gather the right tools. Having everything on hand will make the job smoother and more efficient. The specific items you need might vary slightly depending on your outdoor shower’s design, but this list covers the most common requirements.
- Adjustable Wrench or Pliers: For loosening and tightening connections.
- Air Compressor (with Adapter): Essential for water line blow-out equipment in more complex plumbing systems.
- RV Antifreeze: For systems that can’t be fully drained or for added protection (use potable RV antifreeze, not automotive).
- Bucket or Towels: To catch any residual water.
- Garden Hose: To connect to drain points, if applicable.
- Screwdriver: For removing access panels or showerheads.
- Small Brush or Cloth: For cleaning components.
- Thread Seal Tape (Teflon Tape): For reassembling connections securely.
Understanding Your Plumbing System Drainage
Before you start, take a moment to understand your specific outdoor shower’s plumbing. Is it a simple gravity-fed system? Does it connect directly to your home’s water supply? Or is it a portable unit with a self-contained reservoir?
Knowing your setup—where the main water shut-off is, where the drain valves are located, and if there are any low-point drains—will guide your process. Different systems require different approaches to effectively drain water.
Step-by-Step Guide: How to Drain an Outdoor Shower
Draining your outdoor shower is a straightforward process once you know the steps. We’ll cover general instructions that apply to most setups, then delve into specifics for different types of outdoor showers.
1. Shut Off the Water Supply
This is the first and most critical step. Locate the main water shut-off valve for your outdoor shower. If it’s connected to your home’s main water line, there should be a dedicated shut-off valve somewhere along the supply line, often near the spigot or where the line branches off.
Turn this valve completely off. For a portable unit, simply disconnect it from its water source or ensure the reservoir is empty. Ensure no more water can enter the system before proceeding.
2. Open All Faucets and Showerheads
With the water supply off, open both the hot and cold water valves on your outdoor shower faucet. This releases any pressure in the lines and allows water to begin draining out.
Also, remove the showerhead if it’s easily detachable. This ensures water doesn’t get trapped in the showerhead itself and promotes better airflow for complete drainage.
3. Locate and Open Drain Valves or Low-Point Drains
Many permanent outdoor showers have specific drain valve mechanisms or “low-point drains” at the lowest point of the plumbing system. These are designed to allow all remaining water to escape.
Look for small valves or caps near the ground level of your shower’s plumbing. Open these valves or remove the caps to allow any trapped water to flow out. Use a bucket to catch the water, especially if it’s draining onto a patio or paved area.
4. Clear the Shower Pan and Drain
While the pipes are draining, take a moment to clear the shower pan or base. Remove any debris, leaves, or soap scum. Ensure the drain opening itself is clear and free of obstructions.
For outdoor showers with a traditional drain, consider pouring a small amount of non-toxic RV antifreeze down the drain opening after the water has cleared. This protects the P-trap (if present) from freezing.
5. Use an Air Compressor for a Full Water Line Blow-Out (Optional but Recommended)
For thorough winterization, especially in areas with harsh winters, a water line blow-out equipment procedure is highly recommended. This involves using an air compressor to force any remaining water out of the pipes.
- Ensure all faucets and drain valves are open.
- Locate the water inlet connection for your outdoor shower.
- Attach an air compressor adapter to the inlet.
- Set your compressor to a low PSI (around 30-40 PSI) to avoid damaging pipes.
- Slowly introduce air into the system until no more water comes out of the faucets or drain valves.
- Repeat this process for both hot and cold lines if they are separate.
This step ensures virtually all water is removed, offering superior freeze burst prevention. If you’re unsure about using an air compressor, consult a plumbing professional.
6. Apply RV Antifreeze (When Necessary)
After draining and blowing out the lines, or if you can’t perform a complete blow-out, RV antifreeze application provides an extra layer of protection. This is particularly useful for P-traps that hold water to prevent sewer gas, or in systems where complete drainage is difficult.
Pour a small amount (1-2 cups) of non-toxic RV antifreeze down the shower drain. For supply lines that might retain water, you can sometimes pump antifreeze through the system if your setup allows for it, though blowing out with air is generally preferred for supply lines.
7. Disconnect and Store Hoses and Portable Units
If your outdoor shower uses flexible hoses, disconnect them from the main supply and drain them thoroughly. Hang them vertically to allow all water to drip out, then coil them loosely for storage.
For a portable unit storage readiness, empty its reservoir completely, open all valves, and allow it to air dry. Store it in a protected, dry location, ideally indoors, away from freezing temperatures. This also applies to simple outdoor shower ideas that are not permanently installed.
Specific Drainage Considerations for Different Outdoor Shower Types
While the general steps apply, certain outdoor shower designs have unique drainage needs.
How to Drain an Outdoor Shower: Gravity-Fed Systems
Many camp showers or DIY setups rely on a gravity-fed reservoir emptying process. These are often the easiest to drain.
- Simply open the showerhead valve and let all the water flow out of the reservoir.
- Ensure the reservoir itself is completely empty and dry to prevent mold or algae.
- If there’s a hose connecting the reservoir to the showerhead, disconnect it and hang it to drain.
- Store the reservoir and hose in a dry place.
Draining Solar Showers
Solar showers, often black bags designed to heat water, require specific solar shower water removal. The key is to empty them completely and dry them out.
- Open the nozzle and allow all water to drain.
- Invert the bag or hang it upside down to ensure every last drop is out.
- Wipe the inside dry if possible, or let it air dry thoroughly to prevent mildew.
- Store the dried solar shower in a cool, dry place.
Winterizing RV and Campervan Outdoor Showers
RV outdoor showers are typically part of a larger plumbing system. Draining them is integrated into your overall RV winterization process.
- Follow the steps above: shut off water, open faucets, and open low-point drains.
- Perform a complete water line blow-out using an air compressor through your RV’s city water inlet.
- Pump RV antifreeze through the entire RV plumbing system, including the outdoor shower. Run the outdoor shower hot and cold until pink antifreeze appears.
- Don’t forget the drain trap for the outdoor shower, if it has one. Pour a bit of RV antifreeze directly down it.
For more detailed guidance on your RV’s internal plumbing, check out our guide on RV shower drain maintenance.
Seasonal Maintenance and Long-Term Care
Draining your outdoor shower is a seasonal task, but thinking about its long-term care will keep it performing optimally.
Post-Drainage Inspection and Cleaning
Once your outdoor shower is drained, it’s a great time for an inspection. Check for any leaks, cracks, or wear and tear on hoses, fittings, and the showerhead.
Clean all components thoroughly. Remove any mineral buildup from the showerhead using vinegar, and scrub away any soap scum or mildew from the shower pan. This proactive cleaning prevents problems down the road.
Proper Storage for Disassembled Components
If you’ve disassembled parts of your outdoor shower, such as hoses or showerheads, store them correctly. Keep them in a clean, dry container or bag. Labeling them can be helpful for easy reassembly next season.
Consider protecting exposed pipe ends with caps or plastic bags to prevent dirt and insects from entering during storage.
Troubleshooting Common Drainage Issues
Sometimes, draining an outdoor shower isn’t as straightforward as it seems. Here are a few common issues and how to address them.
Slow Drainage or Trapped Water
If water is draining slowly or seems to be trapped, check for blockages. This could be anything from leaves in the drain to mineral deposits in the pipes.
- Ensure all faucets and drain valves are fully open.
- Check the showerhead for clogs; sometimes, removing it can help water flow out.
- If using an air compressor, ensure adequate PSI and allow enough time for the air to push all water out.
- For P-traps, a small amount of non-toxic drain cleaner (specifically for RVs or outdoor plumbing) can sometimes help, but mechanical clearing is often safer.
Forgetting a Low-Point Drain
A common mistake is missing a low-point drain. Water will always settle at the lowest point of your plumbing. If you’ve drained everything else but still fear freezing, carefully inspect your entire plumbing run.
Sometimes, these drains are small caps or hidden valves. If you can’t find one, a full air blow-out is even more critical to force water uphill and out.
No Dedicated Shut-Off for Outdoor Shower
If your outdoor shower doesn’t have its own shut-off valve, you’ll need to shut off the main water supply to your entire home to drain it. This is inconvenient but necessary. Consider installing a dedicated shut-off valve for easier future maintenance when installing an outdoor shower or making upgrades.
Winterization Checklist for Outdoor Showers
To ensure you don’t miss a step, use this comprehensive checklist when preparing your outdoor shower for colder months.
- Shut Off Water Supply: Turn off the main water valve leading to your outdoor shower.
- Open Faucets: Turn on both hot and cold shower handles to relieve pressure and start drainage.
- Remove Showerhead: Detach the showerhead to prevent trapped water and mineral buildup.
- Locate & Open Drain Valves: Open all low-point drains or specific winterization valves.
- Clear Shower Pan/Drain: Remove debris and ensure the drain opening is clear.
- Air Blow-Out (Recommended): Connect an air compressor to the water inlet and blow out remaining water (30-40 PSI).
- Apply RV Antifreeze: Pour 1-2 cups of non-toxic RV antifreeze down the shower drain (especially for P-traps).
- Disconnect Hoses: Detach any flexible hoses, drain them, and store them properly.
- Empty Portable Units: For solar or portable showers, completely empty and dry the reservoir.
- Inspect & Clean: Check for damage, clean all components, and perform any necessary repairs.
- Store Components: Store disassembled parts in a dry, protected environment.
- Final Check: Confirm no water is visible in any part of the system.
Frequently Asked Questions About Draining an Outdoor Shower
How often should I drain my outdoor shower?
You should drain your outdoor shower whenever temperatures are expected to drop below freezing for an extended period. For seasonal use, drain it completely before winter. If you live in an area with unpredictable freezes, consider draining it after each use in colder months, or always keep it ready for quick drainage.
Can I use car antifreeze for my outdoor shower?
Absolutely not. Automotive antifreeze is toxic and should never be used in any plumbing system that might come into contact with humans or the environment. Always use non-toxic, potable RV antifreeze, which is safe for drinking water systems and biodegradable.
What if my outdoor shower doesn’t have a drain valve?
If your outdoor shower lacks a dedicated drain valve, your best option is to perform a thorough water line blow-out using an air compressor. This method can effectively remove water even without a specific drain. Alternatively, if your system allows, you might be able to disconnect lines at a low point to facilitate drainage.
Do I need to drain a portable outdoor shower?
Yes, even portable outdoor showers, like solar bags or small pump systems, need to be drained. Water left in them can freeze, damaging the reservoir, pump, or hose. More importantly, stagnant water can lead to mold, mildew, and bacterial growth, making your next shower unhygienic. Always empty and dry portable units before storing them.
Is it safe to leave a little water in the pipes if it doesn’t freeze often?
It’s never safe to leave water in pipes if there’s any chance of freezing. Even a single hard freeze can cause significant damage. The risk of burst pipes and costly repairs far outweighs the effort of properly draining your system. Always err on the side of caution for freeze burst prevention.
Conclusion: Master Your Outdoor Shower Maintenance
Learning how to drain an outdoor shower is a fundamental skill that empowers you to protect your outdoor living space and extend the lifespan of your equipment. From preventing costly freeze damage to ensuring hygienic water, proper drainage is a testament to smart outdoor living.
By following these steps, understanding your specific setup, and utilizing the right tools, you can confidently prepare your outdoor shower for any season. Embrace the peace of mind that comes with knowing your system is secure and ready for countless refreshing rinses ahead. Stay safe and stay comfortable!
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