How To Blow Out RV Water Lines With Air A Complete Guide

Hey guys! Are you RV enthusiasts who love hitting the open road? But as the colder months roll in, it's time to think about protecting your trusty home on wheels from the harsh winter weather. One of the most crucial steps in winterizing your RV is blowing out the water lines with air. This prevents freezing and potentially bursting pipes, which can lead to costly repairs. In this guide, we'll walk you through the process step-by-step, ensuring your RV's plumbing system is safe and sound throughout the off-season. So, grab your tools, and let's get started!

Why Blowing Out Water Lines Is Essential

When temperatures drop below freezing, the water inside your RV's plumbing system can turn into ice. As water freezes, it expands, and this expansion can put immense pressure on your pipes, fittings, and water heater. If the pressure becomes too great, these components can crack or burst, leading to significant water damage and expensive repairs. Blowing out the water lines with air is a simple yet effective way to remove most of the water from the system, significantly reducing the risk of freezing. Think of it as giving your RV's plumbing a big sigh of relief before its winter nap.

Imagine this scenario: You skip the winterizing process, and a cold snap hits. A pipe bursts, and water starts leaking into your RV. Not only do you have a plumbing disaster on your hands, but you also risk damage to your RV's interior, including flooring, walls, and furniture. Mold growth can also become a serious issue. Winterizing your RV, especially blowing out the water lines, is a small investment of time and effort that can save you from a major headache and a hefty repair bill down the road. It’s also a great way to ensure that when spring rolls around, your RV is ready to hit the road without any plumbing surprises. Properly winterizing your RV ensures that you can enjoy it for many years to come. It gives you peace of mind knowing that your investment is protected from the elements.

Think of blowing out the lines as preventive maintenance. Just like you change the oil in your car to keep the engine running smoothly, you blow out your RV's water lines to keep the plumbing system in good shape. It's a proactive step that can prevent costly problems down the line. It’s not just about avoiding damage; it’s about preserving the value and longevity of your RV. By taking these precautions, you ensure that your RV remains a reliable and enjoyable travel companion for many adventures to come. The peace of mind that comes with knowing your RV is protected is well worth the time and effort invested in winterizing it.

Moreover, the process is not overly complicated. With a few basic tools and a little bit of know-how, you can tackle this task yourself. There’s no need to be a plumbing expert; the steps are straightforward and easy to follow. This guide is designed to walk you through the process, making it accessible to RV owners of all experience levels. Plus, by doing it yourself, you save money on professional winterizing services, which can be quite costly. You can use those savings for your next RV adventure! Remember, taking the time to winterize your RV properly is an investment in its future. It ensures that you can continue to enjoy the freedom and flexibility of RV travel without the worry of unexpected repairs.

Tools and Materials You'll Need

Before you dive into the process, it's essential to gather the necessary tools and materials. Having everything on hand will make the job smoother and more efficient. Here's a list of what you'll need:

• Air Compressor: A small to medium-sized air compressor is the heart of this operation. Make sure it has an adjustable regulator so you can control the air pressure. A compressor that can deliver around 30-40 PSI is ideal for RV water lines. Using too much pressure can damage your pipes, so control is key.
• Air Compressor Adapter: You'll need an adapter to connect your air compressor hose to your RV's city water inlet. These adapters are readily available at most RV supply stores and are designed to create a secure, leak-free connection.
• Wrench: A wrench will be handy for removing and reinstalling drain plugs and other fittings. An adjustable wrench is a versatile option that can fit various sizes.
• Screwdrivers: Both flathead and Phillips head screwdrivers might be needed to open and close valves or access certain components.
• Non-toxic RV Antifreeze: While blowing out the lines removes most of the water, some areas may still hold residual moisture. RV antifreeze is designed to protect these areas from freezing without contaminating your water system. Never use automotive antifreeze as it is toxic.
• Water Heater Bypass Kit (if applicable): Many RVs have a bypass kit that allows you to isolate the water heater during winterization. If your RV has one, make sure you know how to use it. If not, you'll need to fill the water heater with RV antifreeze.
• Water Heater Drain Plug Wrench (if applicable): Some water heaters have a specific wrench size for the drain plug. Check your water heater's manual to determine the correct size.
• Gloves and Eye Protection: It's always a good idea to protect your hands and eyes when working on any project. Gloves will keep your hands clean and protected, while eye protection will shield your eyes from any debris or splashes.

Having all these tools and materials ready will make the winterizing process much easier and more efficient. Before you begin, take a moment to double-check that you have everything you need. This will prevent frustrating interruptions and ensure that you can complete the job smoothly. Remember, proper preparation is key to a successful outcome!

Step-by-Step Guide to Blowing Out Your RV Water Lines

Now that you've gathered your tools and materials, let's get down to the nitty-gritty of blowing out your RV water lines. Follow these steps carefully to ensure a thorough and effective winterization.

Step 1: Drain the Fresh Water Tank

The first step is to drain your RV's fresh water tank. Locate the drain valve, usually situated on the underside of the RV near the tank. Open the valve and allow the water to drain completely. It's best to do this on a slight incline with the drain valve on the lower side to ensure all the water is removed. Once the tank is empty, close the drain valve securely. This step is crucial because any water left in the tank can freeze and potentially damage the tank itself. Make sure the area around the drain is clear of debris so the water can flow freely. Be patient and allow the tank to drain completely, which may take some time depending on the size of your tank. It’s a good idea to inspect the drain valve itself for any signs of wear or damage. If it looks worn or cracked, it’s a good time to replace it to prevent leaks in the future. Once drained, this ensures that the bulk of the water is removed from your RV's system.

Step 2: Drain the Water Heater

Next, you'll need to drain the water heater. Before you start, make sure the water heater is turned off and the water has cooled down to avoid burns. Locate the drain plug, usually at the bottom of the water heater. Use a wrench to remove the plug, allowing the water to drain. Some water heaters may also have an anode rod, which should be inspected and replaced if necessary. An anode rod protects the water heater from corrosion, so it’s an essential component to maintain. After draining, leave the drain plug out to ensure no water gets trapped. Consider flushing the water heater to remove any sediment buildup. You can use a water heater tank rinser for this purpose. This helps maintain the efficiency and lifespan of your water heater. Remember, the water heater is a critical component of your RV's plumbing system, so proper maintenance is key. By draining and flushing it thoroughly, you prevent freezing and ensure it’s ready for use when you de-winterize your RV in the spring.

Step 3: Bypass the Water Heater (If Applicable)

If your RV is equipped with a water heater bypass kit, now's the time to use it. This kit allows you to isolate the water heater from the rest of the plumbing system, preventing antifreeze from filling it. Follow the manufacturer's instructions to bypass the water heater. If you don't have a bypass kit, you'll need to fill the water heater with RV antifreeze later in the process. Bypassing the water heater saves you a significant amount of antifreeze, as water heaters can hold several gallons. This not only saves money but also reduces the amount of antifreeze you need to dispose of later. If you're not sure whether your RV has a bypass kit, consult your RV's manual or contact the manufacturer. Some RV models have different bypass valve configurations, so understanding your specific setup is essential. If you need to add antifreeze directly to the water heater, make sure you know the capacity of your water heater so you can add the appropriate amount. The bypass kit simplifies the winterization process and is a valuable feature to have in your RV.

Step 4: Open All Faucets and Low Point Drains

Open all the faucets inside your RV, including both hot and cold water taps. Don't forget the shower faucet and any outside showers. Also, locate and open the low point drains, which are typically located under the RV. These drains are designed to remove water from the lowest points in the plumbing system. Leaving the faucets and drains open allows air to circulate freely and helps remove any remaining water during the blow-out process. This step ensures that all water lines are effectively cleared. Opening both hot and cold water taps is essential because it allows air to flow through both lines, ensuring a thorough purge. The low point drains are particularly important because they target the areas where water is most likely to collect. Make sure you collect the water draining from these points to prevent any mess. Double-check that you’ve opened all faucets and drains, as missing one can leave water in the system and increase the risk of freezing. This comprehensive approach ensures that every part of your RV’s plumbing is properly prepared for winter.

Step 5: Connect the Air Compressor

Now it's time to connect your air compressor to the RV's city water inlet. Attach the air compressor adapter to the inlet and connect your air compressor hose. Set the air compressor's regulator to 30-40 PSI. It's crucial not to exceed this pressure, as higher pressure can damage your RV's plumbing. Turn on the air compressor and allow it to build pressure. Start with the lowest pressure setting and gradually increase it until you reach the desired level. Regularly check the pressure gauge to ensure you're within the safe range. If you’re using a portable air compressor, make sure it’s fully charged or connected to a power source. A steady, controlled airflow is essential for effectively clearing the water lines without causing damage. Ensure the connection between the adapter and the city water inlet is secure and leak-free. A loose connection can reduce the effectiveness of the blow-out process. By carefully setting the air pressure and ensuring a secure connection, you’re setting the stage for a successful winterization process.

Step 6: Blow Out the Water Lines

With the air compressor connected and set to the correct pressure, begin blowing out the water lines. Start by opening one faucet at a time, allowing the air to push any remaining water out of the line. Work your way through each faucet, both hot and cold, until you see a steady stream of air and no more water. Repeat this process for the shower faucet and any outside showers. Flush the toilet several times to clear the toilet water line. Be patient and allow enough time for the air to completely clear each line. This may take a few minutes per faucet. If you notice a lot of water initially, let it drain out before focusing on the airflow. If the water flow slows to a trickle, the air pressure is doing its job. Move systematically through each fixture to ensure every line is thoroughly cleared. Don’t forget any appliances that use water, such as a washing machine or ice maker. Disconnect these appliances and blow out their lines as well. This meticulous approach guarantees that all water is removed, minimizing the risk of freezing and damage. By taking your time and thoroughly clearing each line, you’re protecting your RV’s plumbing system from the potential hazards of winter.

Step 7: Add RV Antifreeze to P-Traps and Toilet

Even after blowing out the lines, some water may remain in the P-traps under sinks and showers, as well as in the toilet. To protect these areas, pour RV antifreeze into each drain. Add enough antifreeze to fill the P-trap, typically a cup or two. For the toilet, pour antifreeze into the bowl and flush it to coat the seals and prevent them from drying out. This step is crucial for preventing freezing and damage in these vulnerable areas. RV antifreeze is non-toxic and specifically designed for use in potable water systems, so it won't harm your plumbing. Avoid using automotive antifreeze, as it is toxic and can contaminate your water system. When adding antifreeze to the P-traps, pour it slowly to allow it to settle and fill the trap effectively. For the toilet, make sure the antifreeze coats the entire bowl and the seals. If you have multiple sinks and showers, repeat this process for each one. By adding antifreeze to these specific areas, you’re providing an extra layer of protection against freezing, ensuring the longevity and proper function of your RV’s plumbing system.

Step 8: Pour Antifreeze into the Fresh Water Tank (Optional)

This step is optional but recommended for added protection. Pour about a gallon of RV antifreeze into the fresh water tank. This will coat the tank and prevent any residual water from freezing. Then, turn on the water pump briefly to circulate the antifreeze through the lines. Open each faucet one at a time until you see pink antifreeze coming out. This indicates that the antifreeze has reached the faucet and is providing protection. This step ensures that the water pump and the lines connected to the fresh water tank are also protected from freezing. Circulating the antifreeze through the lines is essential to ensure complete coverage. If you choose not to add antifreeze to the fresh water tank, make sure it is completely empty and dry. However, adding antifreeze provides an extra layer of security, especially in areas with severe winters. By taking this additional step, you’re maximizing the protection of your RV’s water system and minimizing the risk of damage from freezing temperatures. This proactive measure gives you peace of mind knowing that your RV is well-prepared for the winter months.

Additional Tips for Winterizing Your RV

Beyond blowing out the water lines, there are a few other steps you can take to ensure your RV is fully winterized and protected from the elements. These additional tips will help safeguard your RV and ensure it's ready for your next adventure when spring rolls around.

• Disconnect the Battery: Disconnecting the battery prevents it from draining over the winter months. Store the battery in a cool, dry place and consider using a battery maintainer to keep it charged.
• Cover the Tires: RV tires can deteriorate from prolonged exposure to sunlight and cold temperatures. Use tire covers to protect them from the elements.
• Seal Any Openings: Inspect your RV for any gaps or openings where pests or cold air can enter. Seal these openings with caulk or sealant.
• Clean the Interior: Give your RV a thorough cleaning before storing it for the winter. Remove any food items that could attract pests and clean the refrigerator and freezer.
• Cover Your RV: If possible, store your RV under a cover or in a storage facility to protect it from the elements. An RV cover can shield your RV from snow, rain, and UV rays, preserving its exterior and interior.

By following these additional tips, you're not just protecting your RV's plumbing system; you're safeguarding the entire vehicle. These measures help prevent damage from pests, moisture, and extreme temperatures, ensuring that your RV remains in top condition for your next journey. Taking the time to winterize your RV thoroughly is an investment in its longevity and your future adventures. It’s a comprehensive approach that addresses all the potential risks associated with winter storage, giving you confidence that your RV will be ready to roll when the time comes.

Conclusion

Winterizing your RV by blowing out the water lines is a critical step in protecting your investment and preventing costly repairs. By following the steps outlined in this guide, you can confidently prepare your RV for the winter months. Remember to take your time, gather the necessary tools, and follow each step carefully. With a little effort, you can ensure your RV's plumbing system is safe from freezing temperatures, allowing you to enjoy worry-free travels for years to come. So, don't wait until the last minute – start planning your winterization now and give your RV the care it deserves!

By taking proactive steps to winterize your RV, you’re not just protecting its physical components; you’re also preserving its value and ensuring its readiness for future adventures. The peace of mind that comes from knowing your RV is well-protected is invaluable. It allows you to focus on planning your next trip without the worry of potential winter damage. So, gather your tools, follow these steps, and get your RV ready for a cozy winter rest. When spring arrives, you’ll be able to hit the road with confidence, knowing your RV is in top condition and ready for new experiences.