When you need a reliable 100 gallon water tank, this guide highlights practical, space-saving options that fit tight setups like RVs, trailers, and remote properties. Each product below is chosen for durability, ease of use, and suitability for long-term water storage. Best for frequent travelers, remote campers, and small-scale agricultural setups, these tanks balance capacity with compact dimensions for easier transport and installation.
Summary of selected products:
| Product | Capacity | Best For | Key Benefit |
|---|---|---|---|
| RecPro 100 Gallon RV Fresh Water Tank | 100 gallons | RVers and trailer campers | Sturdy rotomolded polyethylene construction |
| RomoTech 82123929 Horizontal 100 Gallon Tank | 100 gallons | Agriculture and RV use | UV‑resistant, clear gallon marks for level view |
| RomoTech 82123925 100 Gallon Horizontal Tank | 100 gallons | Non-flammable liquid storage | Molded gallon/ liter marks, 3/4″ NPT outlet |
| Elkhart Plastics 1000 Gallon Vertical Tank | 1000 gallons | Bulk water storage, rain harvesting | 2 manways, optimized fill and drainage, UV resistant |
| RecPro 200 Gallon RV Fresh & Gray Tank Combo | 200 gallons total | RV water systems needing both fresh & gray | Long-lasting BPA-free polyethylene |
RecPro 100 Gallon RV Fresh Water Tank
This 100 gallon tank is designed specifically for RVs and trailers. It uses BPA-free polyethylene and rotomolded construction for durability on the road. The large capacity makes it suitable for extended trips without frequent refills. Best for full-time travelers or seasonal campers who need a dependable fresh water source.
- Best for RVs needing a reliable 100 gallon supply
- Rotomolded, sturdy construction withstands travel stresses
Caution: Ensure proper mounting and secure connections to prevent movement during transit. The product is designed for fresh water storage; use appropriate fittings for your system to avoid leaks.
RomoTech 82123929 Horizontal 100 Gallon Tank
This horizontal square reservoir provides a true 100 gallon capacity with clear gallon markings for quick level checks. UV-stabilized and rust-proof, it’s built for outdoor use in farms, work sites, or trailers. The oversized lid and built-in bulkhead with 3/4″ NPT outlet support easy filling and quick hookups.
- Best for farm or RV storage with visible level indicators
- UV stabilization and corrosion resistance extend life outdoors
Limitation: The design emphasizes accessibility and outdoor durability; ensure compatibility with your existing plumbing fittings at the bulkhead connections.
RomoTech 82123925 100 Gallon Horizontal Tank
Designed as a non-flammable liquid storage option, this black horizontal poly tank features molded gallon and liter marks and a 3/4″ NPT outlet. It suits RVs, agricultural setups, and portable water storage. It’s best for users who want clear measurement cues and a robust poly build.
- Best for users needing clear measurement marks
- Choose this if you want a sturdy non-flammable liquid tank for outdoor use
Note: While the tank is durable, verify that the inlet/outlet fittings match your plumbing jobs to avoid compatibility issues.
Elkhart Plastics 1000 Gallon Vertical Tank
This vertical tank is designed for bulk water storage, rainwater harvesting, and wide-ranging storage needs. It features dual manways for flexible top-down plumbing and both 1.5″ fill fittings and 2″ drain fittings. UV-resistant HDPE keeps sunlight from affecting the water quality and tank integrity. It’s best for bulk storage on properties where space allows a tall footprint.
- Best for bulk storage and rainwater collection setups
- Vertical design maximizes space efficiency in certain layouts
Caution: A 1000 gallon capacity is substantial; ensure your site can accommodate the tank’s dimensions and weight when full. Use appropriate supports and secure mounting where needed.
RecPro 200 Gallon RV Fresh & Gray Tank Combo
This combo unit provides a 200 gallon total capacity in BPA-free polyethylene, suitable for RVs that require both fresh water and gray water handling. The dual-tank setup is ideal for longer trips where separate storage for used water is preferred. Best for RV owners seeking a simplified, integrated water management solution.
- Best for RVs needing a compact dual-tank system
- Better for separating gray water from fresh supply in one setup
Caution: The combined size is larger than a single 100 gallon tank; confirm space and mounting viability before purchase.
Buying Guide: Key Purchase Considerations
- Capacity vs. space: A 100 gallon tank can meet long trips, but taller vertical tanks may require more mounting space. Consider your vehicle dimensions and storage area.
- Material and safety: BPA-free polyethylene is common for RV use. Look for UV resistance if the tank will be exposed to sun for extended periods.
- Fittings and compatibility: Check outlet sizes (often 3/4″ NPT) and lid access to ensure easy filling and drainage with your existing hoses and pumps.
- Drinking water suitability: For potable water, verify FDA and NSF guidelines if critical. Dark or opaque plastics help protect water quality by limiting light exposure.
- Pros and cons by use case: RV travel favors rotomolded, durable tanks; agricultural or rain harvesting setups may benefit from UV stability and visible measurement marks.
- Maintenance and cleaning: Look for wide openings and bulkhead fittings that simplify sanitary cleaning and system checks.
FAQ
- What is the best 100 gallon tank for RV use? Answer: Tanks designed for RVs with rotomolded construction and BPA-free material are typically best, offering durability and safe water storage.
- Are 1000 gallon tanks suitable for RVs? Answer: They can be, but they require more space and structural support; best for stationary storage at a property rather than mobile use.
- Do these tanks have potable water certifications? Answer: Some tanks are designed for drinking water with FDA/NSF guidelines in mind; verify certifications with the manufacturer.
- What fittings should I look for? Answer: Commonly 3/4″ NPT outlets, easy-fill openings, and bulkhead fittings to match hoses and pumps in your system.
- How do I prevent algae growth in external tanks? Answer: Choose UV-resistant tanks, keep lids tightly closed, and minimize direct sunlight exposure where possible.
- Can I use a 200 gallon RV combo for gray water? Answer: Yes, but ensure proper drainage and separation from fresh water to avoid cross-contamination.