Winterizing trailer plumbing is absolutely critical to prevent catastrophic damage from freezing water. By completely removing water from your system and adding RV antifreeze where necessary, you protect pipes, pumps, and fixtures from bursting during freezing temperatures, ensuring a smooth start to your next camping season.
The Devastating Impact of Frozen Pipes
The biggest threat to your trailer plumbing in winter is, undoubtedly, freezing water. Water expands when it freezes, and this expansion exerts tremendous pressure. Confined within pipes, tanks, and appliances, this pressure can lead to cracks, splits, and even complete failures. The cost of repairing such damage can easily run into thousands of dollars, not to mention the inconvenience and disruption to your travel plans. Therefore, proactive winterization is an investment in protecting your valuable asset.
Essential Steps for Winterizing Your Trailer Plumbing
Before embarking on the winterization process, gather your supplies. You’ll need:
- RV antifreeze (non-toxic) – The amount depends on the size of your trailer; a few gallons is usually sufficient. Never use automotive antifreeze!
- Water pump converter kit or fitting
- Water heater bypass kit (if not already installed)
- Wrench and screwdriver set
- Water heater tank drain plug wrench
- Air compressor with a blow-out adapter (optional, but highly recommended)
- Plumbing lubricant
- Gloves and safety glasses
1. Drain All Water Tanks
The first step is to completely empty your fresh water tank, gray water tank, and black water tank. Ensure you are draining the tanks at a designated dump station to avoid environmental contamination. Allow ample time for the tanks to drain thoroughly.
2. Drain and Bypass the Water Heater
Water heaters are particularly vulnerable to freeze damage. Begin by turning off the water heater and letting the water cool completely. Then, locate the drain plug (usually on the bottom of the tank) and carefully remove it. Allow the water to drain completely.
Important: Install a water heater bypass kit if your trailer isn’t already equipped. This allows you to isolate the water heater from the rest of the plumbing system, preventing the need to fill it with RV antifreeze. Bypassing saves a significant amount of antifreeze and reduces the risk of residual antifreeze taste in your hot water system later.
3. Drain the Water Lines
There are two primary methods for draining the water lines:
-
Using Compressed Air: Connect an air compressor to the city water inlet using a blow-out adapter. Open all faucets (hot and cold) one at a time, including the shower and toilet valve. Blow air through the lines until no more water comes out. Flush the toilet a few times as well. This method is very effective at removing most of the water. Remember to regulate the air pressure to around 30-40 PSI to avoid damaging the plumbing.
-
Using the Water Pump: If you don’t have an air compressor, you can use the water pump to push water out of the lines. Open all faucets and fixtures as described above and let the pump run until it sputters and no more water comes out. This method isn’t as thorough as using compressed air.
4. Add RV Antifreeze
This is the crucial step in preventing freeze damage.
- Install a water pump converter kit or fitting. This allows you to draw antifreeze directly from the jug into the water pump.
- Bypass the water heater (if you haven’t already).
- Turn on the water pump.
- Open each faucet (hot and cold) one at a time, until you see a steady stream of pink RV antifreeze. Close each faucet after antifreeze is visible.
- Flush the toilet until antifreeze appears.
- Pour antifreeze into the shower drain and sink drains to protect the P-traps.
- Pour antifreeze into the toilet bowl and flush a small amount into the black water tank.
5. Protect Other Fixtures and Appliances
Don’t forget about other areas that might contain water:
- Ice Maker: Disconnect the water line to the ice maker (if applicable) and drain it. Consult your owner’s manual for specific instructions.
- Washing Machine: If your trailer has a washing machine, refer to the owner’s manual for winterization instructions. Generally, you’ll need to run an empty cycle with RV antifreeze in the detergent dispenser.
- Outside Shower: Don’t forget to drain and winterize the outside shower.
6. Final Checks
Once you’ve completed all the steps, double-check everything. Make sure all faucets are closed, and all drain plugs are secure. Disconnect the water hose from the city water inlet. Store any removed parts in a safe place for the winter.
FAQs: Your Winterization Questions Answered
FAQ 1: Can I use regular automotive antifreeze in my trailer plumbing?
Absolutely NOT. Automotive antifreeze is highly toxic and should never be used in a potable water system. RV antifreeze is specifically formulated to be non-toxic and safe for contact with drinking water.
FAQ 2: How much RV antifreeze do I need?
The amount of RV antifreeze needed depends on the size of your trailer and the complexity of your plumbing system. A general rule of thumb is to have 2-3 gallons on hand for a smaller trailer and 3-4 gallons for a larger one. It’s better to have a little extra than not enough.
FAQ 3: Is it necessary to bypass the water heater?
While not absolutely mandatory, bypassing the water heater is highly recommended. It saves a significant amount of RV antifreeze and reduces the potential for residual antifreeze taste in your hot water system.
FAQ 4: What happens if I don’t winterize my trailer plumbing?
Failure to winterize can result in burst pipes, cracked fixtures, and damaged appliances. The repair costs can be substantial, often exceeding the cost of winterization many times over.
FAQ 5: How do I know if I’ve added enough RV antifreeze?
You’ll know you’ve added enough when you see a steady stream of pink antifreeze coming out of all faucets and fixtures.
FAQ 6: Can I use the air compressor method even if my trailer is very old?
If your trailer has very old or brittle plumbing, use caution with the compressed air method. Start with a very low pressure (around 20 PSI) and gradually increase it, checking for leaks. If you notice any signs of stress, discontinue the air compressor method and rely on RV antifreeze.
FAQ 7: What should I do if I still smell antifreeze in my water lines after de-winterizing?
Flush the entire system thoroughly with fresh water. You may need to repeat the flushing process several times to remove all traces of antifreeze. Consider using a water filter to further improve the taste and odor.
FAQ 8: Can I leave my gray and black water tanks open during the winter?
It is not recommended to leave your gray and black water tanks open during the winter. Leaving them open can allow pests to enter the tanks and create unpleasant odors. Drain them completely and add a small amount of RV antifreeze to the bottom of each tank to prevent the valves from freezing.
FAQ 9: What if I need to use my trailer during the winter?
If you plan to use your trailer during freezing temperatures, you’ll need to take additional precautions. Consider using a heated water hose, skirting to insulate the undercarriage, and a space heater to keep the interior warm. Monitor the weather forecast closely and be prepared to take action if temperatures drop unexpectedly.
FAQ 10: Do I need to drain the low-point drains?
Yes, absolutely! Low-point drains are designed to remove the lowest points of water in your plumbing system. Open them after draining your tanks to ensure all water is removed from these areas.
FAQ 11: Can I skip winterizing if I live in a mild climate?
Even in mild climates, occasional freezing temperatures can occur. It’s always best to err on the side of caution and winterize your plumbing, even if the risk of freezing is low. The peace of mind is worth the small effort.
FAQ 12: Where can I find more detailed instructions for my specific trailer model?
Consult your trailer’s owner’s manual for specific instructions and recommendations. The manual may contain detailed diagrams and procedures tailored to your particular model. You can also find helpful videos and articles online specific to your trailer brand and model.
A Secure Winter for Your Trailer
By following these steps and addressing these common questions, you can confidently winterize your trailer plumbing and protect it from the damaging effects of freezing temperatures. Taking the time to do it right ensures that your home on wheels will be ready for adventure when spring arrives. Enjoy the peace of mind knowing you’ve safeguarded your investment.