Traveling with Full Water Tanks: Is It Safe for Your RV?

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Are you wondering if you can travel with full water tanks? I’m here to answer all of your burning questions! 

Knowing how much water to carry on the road can be a big concern for new RVers. Traveling with full water tanks does have its benefits, but it also brings concerns about safety, fuel efficiency, and the impact on your RV’s structure. 

In this post, we’ll explore the pros and cons of driving with full water tanks, the effect on fuel mileage, and when it might make sense to fill up completely. By the end, you’ll have a better understanding of how to safely handle your RV’s water tanks for your next adventure.

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The Pros and Cons of Traveling with a Full Fresh Water Tank

Traveling with a full fresh water tank offers some conveniences along with potential drawbacks. Here’s a closer look at the benefits and drawbacks to help you make an informed decision: 

Benefits of Traveling with a Full Water Tank

  • Convenience and Flexibility: Having a full tank means you’re prepared for any situation like boondocking in a remote area or making a long drive without frequent stops. This is useful when campgrounds or rest stops don’t have reliable water access.
  • Immediate Access to Water: With a full tank, you don’t have to worry about finding potable water sources on the road. You can use your water system as needed for cooking, cleaning and restroom stops.
  • Ideal for Remote Destinations: When you’re camping off-grid or in areas with limited facilities, a full tank gives you a peace of mind. You’ll have enough water to last until you reach a place with water access.

Potential Drawbacks of Traveling with a Full Water Tank

  • Reduced Fuel Efficiency: A full water tank does add significant weight, which can lower your RV’s fuel efficiency. This extra weight could mean more fuel stops and higher costs, especially over long distances.
  • Increased Wear and Tear: The added weight also places extra strain on your RV’s suspension, brakes, and tires. Over time, this can lead to faster wear and potential maintenance issues.
  • Safety Concerns on Rough Terrain: If you’re planning to travel on steep or uneven roads, the added weight of a full tank can affect your RV’s stability. It’s important to consider road conditions and your RV’s handling capabilities.
  • Possible Structural Damage: Carrying full tanks without proper support could risk damaging your RV’s underbelly. Checking your tank supports and securing loose parts is essential before hitting the road.

Impact on Fuel Efficiency and Mileage

Water is heavy—each gallon adds about 8.3 pounds to your load, so carrying a full tank can really increase your vehicle’s weight. This added weight will require more fuel to maintain speed and power, especially on long trips or hilly terrain. 

Fuel Efficiency Calculator for RVs with Full Water Tank

Fuel Efficiency Calculator: Full vs. Empty Water Tank







Results:

As a result, you may experience lower miles per gallon and increased fuel costs. For some RVers, the convenience of having ample water on board outweighs the extra fuel expense, but for others, waiting to fill up closer to the destination can help save on gas and improve mileage.

A water spigot with a blue water filter attached is connected to a coiled blue hose lying on the ground. The setup is on a concrete base surrounded by grass and dirt, indicating a campsite or RV park water hookup.

Should You Fill Up Before Leaving or Wait?

Deciding whether to fill up your water tank before you leave or wait until you’re closer to your destination will depend on a few factors, including the availability of water sources along your route and the impact on your fuel efficiency. If you’re heading to a remote area where potable water is scarce, filling up beforehand will ensure that you’ll have a sufficient supply. 

However, if you’re traveling to a more populated area with plenty of water access points, waiting to fill up closer to your destination can help reduce fuel costs and lessen the strain on your RV. Many RVers find a compromise by partially filling their tanks at home and topping off as needed along the way.

How Much Water Should You Carry?

The amount of water you should carry depends on factors like your destination, travel plans, and personal needs. If you’re heading to a campground with full hookups, you may only need enough water to get you there, reducing the weight and saving fuel. 

However, if you’re boondocking or staying in a remote location with limited water access, having a full tank is probably a good idea. A good rule of thumb is to consider how much water you use each day for things like cooking, showering, cleaning and drinking, and then multiply that by the number of days you won’t have access to a water source.

You’ll need to consider where you’re going and the access (or lack of) to water, your RV’s capacity, and your personal water needs in order to find the right balance for each trip.

The underside of an RV shows a damaged and partially detached underbelly panel, exposing a sagging water tank with black and blue hoses attached. The tank appears to be leaking, and insulation material is visible around the edges. This image highlights a potential issue with water tank support in RVs.

Structural Concerns: Will Tanks Fall Out?

While it’s super rare for tanks to fall out, carrying a full tank of water does increase the strain on the structure of your RV. Over time, the added weight can weaken tank supports, especially if they are not being maintained or if you frequently travel over rough or uneven terrain.

To minimize the risk, you should regularly inspect the supports and brackets that hold your tanks in place. Check for signs of rust, loose fittings, or damage to the underbelly. Investing in sturdy tank supports or skid plates can also provide additional stability and protection.

With proper maintenance and a quick inspection you can safely travel with full tanks and reduce the risk of structural issues.

Inspecting Your RV Underbelly Before Travel

It’s essential to inspect your RV’s underbelly for any signs of wear or damage regularly. The underbelly protects critical components, including your water tanks, so keeping it in good condition ensures a safe trip. 

Start by looking for loose brackets, rust, or any signs of deterioration around the tank supports. If you notice anything that seems unstable or corroded, it’s best to address it before traveling.

You’ll want to pay special attention to the mounting points and areas where the tank is fastened to the frame. If you travel on rough terrain a lot, consider installing reinforced brackets or skid plates to add extra protection. 

Regular inspections can help you catch issues early, preventing potential tank damage or failure on the road. Taking a few minutes to check your underbelly before each trip can save you from costly repairs and unexpected complications.

When Should You Drive with Full Tanks?

Driving with full water tanks can be helpful in certain situations, like when your destination is remote or lacks water access. When we know we’ll be boondocking or staying at a campground with limited access, we definitely fill up our tanks before leaving.

Full tanks are also beneficial when traveling to areas with uncertain water quality, as it allows you to bring your own supply of clean water. In general, driving with full tanks makes sense when water access is limited or uncertain. 

Navigating Steep Grades with Full Water Tanks

When you drive on steep grades with full water tanks it can create some challenges for your RV. The extra weight impacts braking, handling, and overall stability, making it more difficult to navigate uphill climbs and control your descent. 

To safely tackle steep terrain, reduce your speed and shift into a lower gear to maintain control. It’s also important to give your brakes regular breaks to prevent overheating, especially on extended downhill stretches. 

If possible, it’s always a good idea to plan routes that avoid steep grades, or consider traveling with a partially filled tank to reduce strain. 

A close-up of an RV water fill inlet with a white twist-lock cap, marked with the brand "B&B." The cap is partially open, allowing access for filling the fresh water tank. A flexible metal hose is visible nearby, suggesting a connection for water supply.

Tips for Traveling with Full or Partially Full Tanks

When you’re deciding how much water to carry, a few practical tips can help ensure a smoother and safer journey, whether your tanks are full or partially filled:

  1. Balance the Load: Distribute the weight evenly by loading other supplies in a way that counterbalances your water tanks. This can improve handling and reduce stress on the suspension.
  2. Check Tire Pressure: Properly inflated tires are essential when carrying extra weight. Overloaded or underinflated tires can increase wear and affect fuel efficiency, so ensure your tires are at the recommended pressure for a heavier load.
  3. Use Water Stabilizers: If you plan to travel with water stored for an extended period, consider using a water stabilizer to keep it fresh and safe for use, especially when boondocking or heading to remote areas.
  4. Drive Cautiously: Extra weight can impact stopping distance, so maintain a safe following distance, especially on downhill stretches. Slow and steady driving helps manage the load more effectively and reduces strain on your RV.
  5. Plan for Refills: Research water refill stations along your route, so you can adjust your water levels as needed. If you’re traveling to areas with access to potable water, consider filling up closer to your destination to save fuel.
  6. Inspect Your Tank Supports: Before any trip, make sure your tank supports and brackets are in good condition. This is particularly important when carrying full tanks over rough terrain.

Advice from Experienced RVers

I asked my fellow RVers for their opinions on traveling with full water tanks so that I could get you the most accurate information. Most of these RVe’rs have several years of on-the-road experience. Here are some of the top recommendations that were given:

  1. Assess Each Trip Individually: Tailor your water load to the specific needs of each trip. Consider factors like distance, terrain, and water access at your destination before deciding how much to carry.
  2. Prioritize Weight Distribution: Focus on overall weight distribution in the RV. Ensuring even load placement can enhance stability and make driving safer, especially with a full water tank.
  3. Check for Local Resources: Look for potable water sources along your route. Local rest areas, truck stops, and campgrounds often provide water refill stations, allowing you to travel lighter until you reach a convenient refill point.
  4. Know Your RV’s Capabilities: RVers who have driven different models suggest getting familiar with your RV’s handling and braking abilities under various load conditions. This helps you anticipate how your vehicle will perform with a full tank versus a partial load.
  5. Invest in Upgrades: Invest in aftermarket upgrades, such as reinforced tank supports, better shocks, and more durable tires, especially if they regularly carry full tanks over rough terrain. These improvements can enhance your RV’s durability and safety.
  6. Stay Flexible and Adaptable: Road conditions, weather, and unexpected detours can impact your water needs, so being open to adjusting your plans on the fly is essential for a successful trip.

By following this advice, you can leverage the knowledge of experienced RVers to enhance your own travel experience. With careful planning and flexibility, you can enjoy the benefits of carrying water while minimizing potential risks and challenges.

FAQ: Traveling with Full Water Tanks

How many gallons of water does it take to shower in an RV?

Typically you’ll use about 2 to 6 gallons of water per shower, depending on your showering habits. Here’s a breakdown:

2-3 gallons for a quick, efficient shower, often referred to as a “navy” or “military” shower, where you turn the water off while lathering.
4-6 gallons for a more standard shower with continuous water flow.

To conserve water, you can use a low-flow showerhead and turn off the water while soaping up, which can significantly reduce overall water consumption. This is especially useful if you’re boondocking or trying to extend your water supply between refills.

Do I need to sanitize my RV fresh water tank?

Yes, you should regularly sanitize your RV fresh water tank to ensure the water remains safe for drinking, cooking, and other uses. Over time, bacteria, mold, and algae can grow in the tank, especially if the water sits for an extended period. Most RVers sanitize their fresh water tank at least once or twice a year, or more frequently if they use their RV often.

Here’s a simple way to sanitize your tank:
Rinse Thoroughly: Drain the bleach solution and flush the tank and lines with fresh water until the chlorine smell is gone.
Drain the Tank: Start by emptying any remaining water from the tank.

Add a Sanitizing Solution: Mix 1/4 cup of household bleach per 15 gallons of tank capacity with water, and pour it into the tank.

Fill and Let Sit: Fill the tank completely with fresh water and let the bleach solution sit for 4-12 hours. Make sure to run the solution through all faucets to sanitize the entire system.

How do you know when your camper water tank is full?

You can tell when your camper’s water tank is full in a few ways:

Sound and Flow: When filling the tank, you may hear a change in the sound as it fills up, usually a gurgling or sputtering noise as air escapes. If you’re using a hose, water may start to back up or spray back as the tank fills completely.

Monitor Panel: Most RVs have a control panel with sensors that indicate the water level in each tank. This is the easiest way to check the status and know when the fresh water tank is full.

Overflow Valve: Many RVs have an overflow valve that will start releasing water when the tank reaches capacity. If you notice water spilling from this valve, it’s a clear sign that the tank is full.

Can I travel with my black tank full?

Yes, you can travel with your black tank full, but it’s generally not recommended unless absolutely necessary. Not only will it add extra weight, but it’ll also be a pretty stinky ride. It’s usually best to empty the black tank before traveling. 

Can you drink from the fresh water tank in RV?

Yes, you can drink from the fresh water tank on your RV. Using RV-safe water filters, sanitizing the tank with diluted bleach, and regularly flushing the system are all good practices to ensure the water is potable.

How long will 40 gallons of water last in an RV?

A 40-gallon water tank can last anywhere from 2 to 5 days in an RV, depending on how conservatively you use the water. Here’s a general breakdown:

  • 2-3 days for two people using water for basic needs like cooking, drinking, quick showers, and dishwashing.
  • 3-5 days if you’re very conservative, using minimal water for each task, taking military-style showers, and reducing dishwashing.

Factors like how many people are in your RV and your water usage habits will affect how long it lasts. 

How often should you empty a grey water tank?

You should empty your RV’s grey water tank whenever it reaches about two-thirds to three-quarters full, or at least every few days. Frequent emptying prevents backups, reduces odors, and keeps the system running smoothly.

What happens when the RV GREY water tank is full?

When your RV’s grey water tank is full, you’ll probably notice water backing up in sinks or the shower, and it may even overflow into your RV if not dealt with quickly. A full grey water tank can also lead to unpleasant odors, as the water contains soap residue, food particles, and other waste from daily activities.

How long can you leave water in your freshwater tank in an RV?

You can safely leave water in your RV’s fresh water tank for about two weeks before bacteria and algae can start to grow.If you’re not planning to use the water for drinking, it might last a bit longer, but it’s generally a good idea to drain and refill the tank every few weeks to ensure the water stays fresh.

Conclusion: Is it Safe to Travel With Full Water Tanks?

Yes, traveling with full water tanks can be safe, as long as you’re prepared and mindful of your RV’s limits. Having a full tank is great when you’re heading somewhere without easy water access, like a remote campsite. 

However, it does add weight, which can affect fuel efficiency and make driving a bit trickier, especially on steep or rough roads. Taking the time to inspect your RV’s supports and checking that everything’s in good shape can help you avoid any issues.

In the end, it’s all about balancing convenience with caution. If you’re not sure, try filling the tank halfway and refilling when you get closer to your destination. As long as you’re flexible and aware of how your RV handles with the extra weight, you’ll be ready for a safe trip.

Need More RV Tips and Advice?

Whether you’re wondering about RV safety, wintering in an RV or boondocking, I’ve got you covered! RV life can be full of surprises, but I’m here to help.

I’ve got tips on propane regulators, LED bulb replacements, the best RV vacuums and surge protectors. Learn how to clean an RV air conditioner filter, how to dump your tanks, how to run your RV fridge on propane and fridge maintenance tips.

Get RV storage ideas for maximizing space both overall and in your closet. You can also learn about roadschooling and how you can make money while traveling.

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