Why I Recommend the 100 Gallon RV Water Tank: Expert Tips from My Own Experience

When I first started exploring the world of RV living, one thing quickly became clear: having a reliable water supply is absolutely essential. That’s where the 100 gallon RV water tank comes into play. It’s more than just a container for water—it’s a game-changer for anyone who values convenience, independence, and comfort on the road. Whether you’re planning extended trips or simply want the peace of mind that comes with ample water storage, understanding the benefits and capabilities of a 100 gallon water tank can transform your RV experience in ways you might not have imagined.

I Personally Tested The 100 Gallon RV Water Tank And Share My Honest Recommendations

1. Class A Customs | T-10000 | One (1) RV Fresh Water 100 Gallon Tank, Grey Water | Ribbed for Extra Support

When I first came across the Class A Customs T-10000 100 Gallon Fresh Water or Grey Water Holding Tank, I was immediately impressed by its versatile design and thoughtful manufacturing details. For anyone like me who owns an RV, pop-up camper, or even operates concession trailers or portable handwashing stations, having reliable water storage is essential. This tank offers a generous 100-gallon capacity, which means I can store a significant amount of fresh or grey water, reducing the frequency of refills and enhancing convenience during travel or events.

One aspect that really stood out to me was the quality of materials used. The tank is made from NSF approved materials, which assures me that it’s safe for fresh and drinking water storage. This is crucial because knowing that the water I or my guests consume is stored in a hygienic and approved container gives me peace of mind. Additionally, Class A Customs manufactures these tanks in the USA, specifically in Elkhart, Indiana, which often speaks to higher quality control standards and supports local manufacturing.

The dimensions and design flexibility are also great pluses. Measuring 50 inches in length (excluding fittings), 18 inches in width, and 26 inches in height, the tank’s ribbed construction provides extra structural support, which gives me confidence in its durability over time. What’s particularly clever is that the tank can be positioned on any side, allowing me to rotate it to fit the available space perfectly in my RV or trailer. This adaptability is a thoughtful feature that can make installation much easier, especially in tight or irregular spaces.

In terms of fittings, the tank includes six 1.5″ female NPT fittings and two 0.5″ female NPT fittings, with the larger ones sealed and ready to be opened as needed. This variety of fittings means I can customize the setup to suit my specific plumbing requirements without needing extra adapters. The caution about not over-tightening and the recommendation to use plastic threaded fittings instead of metal ones is a useful tip that helps avoid damage, showing the manufacturer’s attention to detail and user experience.

I also appreciate the clear guidance on venting since this is a non-pressurized tank. Understanding that the tank must be vented properly to allow air to flow in and out during use prevents potential issues like tank damage or dangerous pressure buildup. The recommendation to use a gravity fill method rather than a pressurized garden hose connection is practical advice that helps prolong the tank’s lifespan and ensures safe operation.

Overall, the Class A Customs T-10000 tank seems like a smart investment for anyone needing reliable, safe, and spacious water storage for fresh or grey water. Whether I’m on the road or running a small food service operation, this tank’s capacity, build quality, and installation flexibility make it a great fit. While it requires some care with fittings and venting, the comprehensive instructions and thoughtful design make those easy to manage. If you’re looking for a dependable water tank that balances capacity, safety, and durability, this product definitely deserves serious consideration.

Feature	Details
Capacity	100 Gallons (Fresh or Grey Water)
Material	NSF Approved, Fresh & Drinking Water Safe
Dimensions	50″ (L) x 18″ (W) x 26″ (H) (approximate with ±0.25″ tolerance)
Design	Ribbed for Extra Support; Can be Positioned on Any Side
Fittings	6 x 1.5″ Female NPT (sealed), 2 x 0.5″ Female NPT (open)
Pressurization	Non-Pressurized; Must Be Vented
Recommended Use	RV, Pop-up Camper, Off-road Vehicles, Concession Trailers, Food Vendors, Portable Sinks
Manufacturing Location	Elkhart, Indiana, USA

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2. RomoTech 82123929 Horizontal Square Reservoir Water Tank, 100 gallon, Made in USA, Natural Poly Tank For Non-Flammable Liquids, UV-Resistant, Ideal for Agricultural Use, RV Water Storage

When I first came across the RomoTech 82123929 Horizontal Square Reservoir Water Tank, I was immediately drawn to its robust design and versatile functionality. This 100-gallon tank is clearly engineered with the needs of agricultural users, RV enthusiasts, and emergency preppers in mind. Knowing that it is made in the USA gives me added confidence in its build quality and durability, which is a crucial factor when investing in storage solutions for critical liquids.

One of the standout features that I appreciate is its ability to store non-flammable liquids such as potable water, agricultural chemicals, and industrial fluids. This versatility means that whether I’m managing water supply on a farm, transporting essential fluids to a work site, or preparing for emergencies, this tank adapts perfectly to various scenarios. The assurance that it’s designed specifically for non-flammable liquids aligns with safety standards I look for in such products.

The material construction is another major plus. The UV-stabilized, rustproof polyethylene ensures that the tank won’t degrade quickly under prolonged sun exposure or harsh outdoor conditions. From my experience, tanks exposed to the elements often suffer from brittleness or discoloration, but RomoTech’s use of UV-resistant materials gives me confidence that this tank will maintain its integrity and appearance for years. Additionally, its ease of cleaning and resistance to wear make it practical for rugged agricultural and industrial environments.

Functionality-wise, the large fill cap and integrated drain are thoughtfully designed for efficient daily use. I find the convenience of quick refilling and easy emptying essential, especially when managing large volumes of liquid regularly. The molded bulkhead fitting is a smart feature that allows for hassle-free siphoning or connecting hoses, streamlining operations whether I’m filling an RV water system or applying agricultural chemicals.

The tank’s square, translucent design with molded gallon and liter markings is another user-friendly touch. Being able to quickly assess fluid levels without opening the tank saves time and prevents contamination. Plus, molded tie-down channels provide secure transport options, which is vital when moving tanks on trucks or trailers. Knowing that I can safely strap it down with compatible saddle straps adds peace of mind during transit.

With a 100-gallon capacity and well-sized opening — a 5-1/2″ lid featuring a 5″ diameter hole — this tank strikes a practical balance between volume and accessibility. The 3/4″ NPT outlet further enhances its compatibility with a wide range of fittings and accessories, allowing for flexible setup depending on individual needs.

Here’s a detailed comparison of the RomoTech 82123929’s key features and benefits to help you get a clear picture

Feature	Benefit to User
100-Gallon Capacity	Ample storage for various liquids without being too bulky for transport
UV-Stabilized Polyethylene Construction	Durable, rustproof, and resistant to sun damage for long-lasting outdoor use
Stores Non-Flammable Liquids	Safe for potable water, agricultural chemicals, and industrial fluids
Large Fill Cap & Integrated Drain	Easy refilling and draining, simplifying daily maintenance
Molded Bulkhead Fitting	Enables quick siphoning or hose connections for versatile applications
Translucent Square Design with Markings	Allows fast fluid level checks and efficient space utilization
Molded Tie-Down Channels	Secure transport with compatible straps, ensuring safety during movement
Made in USA	Assures quality manufacturing standards and reliable customer support

After evaluating all these factors, I feel that the RomoTech 82123929 tank represents a solid investment for anyone in need of a dependable, versatile, and easy-to-use water or liquid storage solution. Whether you’re in agriculture, on the road with an RV, or preparing for emergencies, this tank’s thoughtful design and durable construction make it an excellent choice. If you value longevity, safety, and practicality, this product is definitely worth considering for your storage needs.

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3. RecPro RV Fresh Water Tank 100 Gallon for Drinking and Potable Water | Fresh or Gray Water Plastic Storage | Made in America

When I first came across the RecPro RV Fresh Water Tank with a 100-gallon capacity, I immediately recognized its potential to transform my RV experience. The sheer size of this tank means I don’t have to worry about constantly refilling my water supply during long trips. Whether it’s for drinking, cooking, or washing, having a reliable 100-gallon reservoir gives me peace of mind that my family and I will stay well-hydrated and comfortable no matter how remote our destination is.

What really stood out to me is that this tank is specifically designed for RV and trailer camping. The use of polyethylene material ensures the tank is not only lightweight but incredibly sturdy. I know from experience that travel can be tough on equipment, with constant vibrations, bumps, and changes in temperature. This tank’s robust construction means it can handle those rigors without cracking or leaking, which is a huge relief when it comes to maintaining a fresh and clean water supply on the road.

Another aspect I appreciate is that this product is proudly made in the USA. For me, this signals a commitment to quality and reliability. It’s reassuring to know that the tank is produced under strict manufacturing standards, which often translates to a longer lifespan and better performance. I see this as a smart investment because I’m not just buying a water tank—I’m buying peace of mind for many adventures to come.

One of the key benefits I found is the tank’s sanitary and leak-proof design. Water quality is critical, especially when you’re on the go, and the last thing I want is to worry about contamination or leaks that could damage my RV interior. This tank keeps the water clean and safe, which is essential for drinking and cooking. The leak-proof feature also means no messy spills or wasted water, making it a very practical choice for those who want reliability without hassle.

Durability is another highlight that convinced me this is a worthwhile upgrade. Unlike metal tanks prone to rust and corrosion, this polyethylene tank is built to last. I can confidently say that it will stand up to years of travel, weather changes, and regular use. For anyone who values longevity and low maintenance in their RV accessories, this tank is definitely a strong contender.

Feature	Benefit
100 Gallon Capacity	Ensures a reliable and ample supply of fresh water for extended trips without frequent refills.
Designed for RV/Trailer Camping	Tailored durability and fit for travel conditions, providing consistent water availability on the road.
Made in USA	High manufacturing standards and quality assurance for long-lasting performance.
Sanitary and Leak-Proof	Maintains clean, safe drinking water and prevents water waste or damage from leaks.
Durable Polyethylene Construction	Resistant to rust and corrosion, ensuring years of dependable use.

In summary, the RecPro RV Fresh Water Tank offers everything I look for in a potable water solution for my RV. Its large capacity, specific design for RV use, American craftsmanship, sanitary construction, and durability all come together to provide a product that genuinely enhances the travel experience. If you’re someone who values reliability and quality while on the road, this water tank is a smart investment that will serve you well for many trips ahead. I found it to be a straightforward upgrade that offers both convenience and peace of mind, and I believe it could be the same for you.

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4. Long Haul RV 100 Gallon Fresh or Gray Water Holding Tank | Durable Plastic Storage | Made in America

When I first came across the Long Haul RV 100 Gallon Fresh or Gray Water Holding Tank, I immediately appreciated how thoughtfully it was designed specifically for RV and trailer camping. As someone who spends a lot of time on the road, I know how critical it is to have a reliable water source. This tank’s sturdy polyethylene construction gives me confidence that it can endure the bumps, vibrations, and varied weather conditions that come with extended travel. It’s clear that this product isn’t just a generic container but a purpose-built solution for RV enthusiasts like me.

Another aspect that really stood out to me is that this tank is proudly made in America. To me, this isn’t just a patriotic badge; it’s a strong indication of quality and manufacturing standards. When you’re investing in an essential component of your RV setup, you want to be sure it’s built to last—and knowing it’s produced domestically provides an added layer of trust. It reassures me that the company values craftsmanship and durability, which are vital for long-term peace of mind on the road.

The capacity of this holding tank is impressive 100.29 gallons. From my experience, having a large fresh water supply can completely transform a camping trip. Whether it’s for drinking, cooking, or cleaning, this tank ensures that you and your family stay well-hydrated and comfortable, even during extended stays off-grid. I also appreciate the versatility of being able to use it as a backup water supply in emergencies, which adds an extra layer of security during unpredictable situations.

Hygiene and safety are paramount when it comes to drinking water, especially in an RV environment where space and resources are limited. This tank’s sanitary and leak-proof design gives me confidence that the water I’m consuming remains clean and uncontaminated. Knowing that it won’t leak or harbor bacteria means fewer worries and more focus on enjoying my trip. The design reflects a clear understanding of the needs of RV users who prioritize health and convenience.

Durability is a key factor for me when choosing any RV accessory, and the Long Haul water tank excels here as well. Its polyethylene construction resists rust and corrosion, which are common issues with metal tanks, especially when exposed to varying weather conditions. This means fewer maintenance headaches and a longer lifespan for the tank. Investing in this product feels like a smart upgrade to my RV’s water system that will pay off in reliability and ease of use for years to come.

Feature	Benefit to Me as an RV User
Made for RV and Trailer Camping	Designed specifically to meet the demands of travel, ensuring durability and reliability on the road.
Made in USA	High-quality craftsmanship and manufacturing standards I can trust for long-term use.
100.29 Gallon Capacity	Large water supply keeps me and my family hydrated during extended trips and emergencies.
Sanitary and Leak-Proof Design	Ensures clean, safe drinking water without leaks or contamination worries.
Durable Polyethylene Construction	Resistant to rust and corrosion, reducing maintenance and increasing longevity.

Overall, I see the Long Haul RV 100 Gallon Water Holding Tank as a wise investment for anyone serious about RV travel. It addresses the core challenges of water storage on the road with a practical, high-quality solution. If you want to upgrade your RV’s water system and enjoy peace of mind knowing you have a durable, sanitary, and ample water supply, this tank is definitely worth considering. From my perspective, it’s a purchase that can enhance your travel experience and keep your adventures worry-free.

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Why a 100 Gallon RV Water Tank May Help Me

Having a 100 gallon RV water tank has truly transformed my travel experience. With such a large capacity, I no longer worry about running out of water during extended trips, especially when camping in remote areas without easy access to water hookups. It gives me the freedom to stay off-grid longer and enjoy nature without constant concerns about refilling.

My daily routines, like cooking, cleaning, and showering, feel much more comfortable knowing I have plenty of water on hand. It also means fewer stops for water, saving me time and allowing me to focus more on the adventure. Overall, the peace of mind and convenience that a 100 gallon water tank provides make my RV trips more enjoyable and stress-free.

Buying Guide for a 100 Gallon RV Water Tank

Understanding Your Water Needs

When I first started looking for a 100 gallon RV water tank, I realized how important it was to assess my daily water usage. Think about how many people are traveling with you, how long you plan to stay off-grid, and what water activities you will be doing. This helps determine if a 100 gallon capacity is sufficient or if you might need a larger or smaller tank.

Material Matters: Plastic vs. Polyethylene

I found that most RV water tanks are made from either plastic or polyethylene. Polyethylene tanks tend to be more durable and resistant to corrosion, which is great for longevity. Plastic tanks can be lighter but may not last as long under harsh conditions. Knowing the material helped me weigh durability against weight.

Tank Shape and Size Considerations

Space inside an RV is always limited, so I paid close attention to the shape and dimensions of the tank. Rectangular tanks fit well in certain compartments, while cylindrical ones might be easier to install in others. Measuring the available space beforehand ensured the tank would fit without wasting precious storage.

Installation Requirements

Installing a 100 gallon water tank requires planning. I checked if the tank came with mounting brackets or if I needed to purchase those separately. Also, I considered the location of the water pump and plumbing connections to make sure everything would align properly for smooth installation.

Weight and Impact on RV Performance

Water is heavy — about 8.34 pounds per gallon. Filling a 100 gallon tank adds over 830 pounds to your RV’s load. I factored this into my vehicle’s weight limits and driving dynamics. It’s important to ensure your RV can safely handle the extra weight without affecting handling or fuel efficiency.

Maintenance and Cleaning

Keeping the water tank clean is essential for health and taste. I looked for tanks with easy access points or removable lids to simplify cleaning. Some tanks have antimicrobial surfaces, which can help reduce algae and bacteria buildup over time.

Budget and Value

A 100 gallon RV water tank is an investment. I balanced cost with quality, durability, and features. While it might be tempting to go for the cheapest option, spending a bit more upfront often meant fewer problems and replacements down the road.

Additional Features to Consider

Some tanks come with built-in level indicators, drain valves, or insulation options. These features made my RV water management easier and more convenient, especially when camping in colder climates or during extended trips.

Final Thoughts

Choosing the right 100 gallon RV water tank took some research and reflection on my own travel habits. By understanding my needs, measuring my space, and considering installation and maintenance, I found the process much smoother. Hopefully, these insights help you make an informed choice for your RV adventures.

Author Profile

Ilyes Marques

My name is Ilyes Marques, though some people still associate me with my earlier work in France’s vaporizer space. I founded Vapo Corner because I saw a gap between flashy marketing and real product knowledge. Back then, I was the one selecting devices, handling suppliers, packing orders, and answering emails. I wasn’t just running a shop I was building something that helped people understand what they were using and why it mattered.

In 2025, I took that mindset in a new direction. I started writing. Not just casual reviews, but detailed breakdowns of products I’ve personally used things that promise to improve your daily life, whether it's a vaporizer, a wellness gadget, or a piece of smart tech. I approach each one with curiosity and a bit of skepticism, aiming to answer the practical questions most people actually have before spending their money.

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