Top picks for 700 gallon water tanks provide durable, UV-stable storage for potable water, irrigation, emergencies, or industrial liquids. This guide helps buyers choose tanks suited to farms, homes, and remote settings. Each option is evaluated for longevity, ease of use, and suitability for specific needs.
Who should consider these 700 gallon tanks?
– Farmers and ranchers needing bulk water or agricultural solutions.
– Homeowners planning emergency water storage or rainwater harvesting.
– Small to mid-size operations requiring non-flammable liquid storage.
– RVers or campers seeking robust, portable water storage with simple access.
The following table summarizes five well-matched options for quick comparison.
| Product | Best For | Capacity | Key Benefit |
|---|---|---|---|
| RomoTech 550 Gallon Tank | Farms, Industrial sites | 550 gallons | Heavy-duty, UV-stable, BPA-free |
| Elkhart Plastics 1000 Gallon Tank | Rainwater harvesting, bulk storage | 1000 gallons | Vertical design with large access and fittings |
| iSpring 40 Gallon RO Tank | Reverse osmosis systems, small spaces | 40 gallons | Pre-pressurized, adjustable positioning |
| RomoTech 82123925 100 Gallon Tank | Portable storage, non-drinkable liquids | 100 gallons | Molded gallon marks, rugged outdoors |
| Chapin 40 Gallon Tank | Garden and irrigation tasks | 40 gallons | Translucent, easy transport |
Each product below is chosen for relevance to the 700 gallon storage category, durability, and practicality in real-world settings. Use the Buying Guide at the end to refine your choice based on space, access, and liquid type.
RomoTech 550 Gallon Poly Storage Tank
Best for: Farms and industrial settings needing large-capacity, durable liquid storage. This 550 gallon tank is designed for potable water, agricultural solutions, and non-flammable industrial liquids. Built with UV-stabilized medium-density polyethylene, it resists cracking and outdoor degradation, making it a practical option for long-term outdoor use. The tank is rustproof and BPA-free, supporting safe water storage and non-contaminating storage on farms or industrial sites.
Why selected: The combination of UV resistance, rustproof construction, and BPA-free material prioritizes safety and outdoor durability. It’s well-suited for permanent installations where sunlight exposure is a factor and where chemical compatibility is key.
Caution: The 550 gallon size is slightly smaller than a 700 gallon target, so plan higher capacity needs if you require true 700 gallons. It’s best when paired with larger systems for bulk storage or as a supplementary tank in a multi-tank setup.
Elkhart Plastics 1000 Gallon Vertical Tank
Best for: Rainwater harvesting, bulk storage, and long-term water collection. This vertical 1000 gallon tank emphasizes reliability with UV-resistant HDPE to protect against sun exposure. The included features support flexible installation and thorough access. Two 16″ manway lids provide top-down plumbing and filtration catchment, with 1.5″ fitting at the highest point and 2″ fittings at the lowest point to optimize fill and drainage. FDA and NSF/ANSI 61 compliance are noted for safe drinking water use.
Why selected: Its vertical design maximizes space efficiency, while the dual-access design and strategic fittings enable versatile plumbing configurations for a wide range of applications, including emergency water storage and irrigation reservoirs.
Caution: While ideal for bulk storage, the vertical footprint may require more space in tight setups. Confirm available height and clearance for installation before purchase.
iSpring 40 Gallon RO Tank
Best for: Reverse osmosis systems in smaller spaces where compact storage is required. This pre-pressurized tank supports efficient water storage for RO systems and includes necessary components like a tank valve and elbow. It can operate in either vertical or horizontal positions, allowing flexible placement for compact layouts in homes or offices.
Why selected: The tank’s compatibility with RO systems and its flexible positioning make it a practical choice for households needing reliable storage without occupying considerable space. The inclusion of valve and connector components reduces installation steps.
Caution: This option is much smaller than 700 gallons, suitable for RO systems rather than bulk water storage. Use as a companion tank or for localized storage rather than primary bulk capacity.
RomoTech 82123925 100 Gallon Horizontal Tank
Best for: Portable water storage or handling non-flammable liquids in a compact form. This 100 gallon horizontal tank features molded gallon and liter marks, enabling quick level checks for non-potable or potable liquids. It is UV-stabilized and rustproof, designed for outdoor use on farms, work sites, or trailers. A 3/4″ NPT outlet and built-in bulkhead fitting simplify refilling and drainage.
Why selected: The molded measurement marks and rugged exterior make it easy to gauge remaining volume, which supports accurate planning in mobile or temporary storage scenarios. It’s a good option when space is limited but you still need durable outdoor storage.
Caution: At 100 gallons, it does not approach the 700 gallon capacity. Use as an auxiliary tank or for targeted liquid storage alongside larger tanks.
Chapin 98142 Water Storage Tank
Best for: Garden and lawn irrigation tasks where a portable, translucent tank is useful. The Chapin 40 gallon tank is designed for easy transport via truck, tractor, or trailer. It includes a built-in drain and a garden-hose port for controlled emptying, enabling efficient irrigation workflows.
Why selected: The translucent design helps monitor water levels quickly, and the 2″ drain plus 3/4″ garden hose compatibility supports practical water management in outdoor settings.
Caution: Small capacity limits its use for large-scale storage. Use as a supplemental tank or for small projects in yards or fields.
Buying Guide
Key considerations when choosing a 700 gallon or larger storage solution:
- Liquid type and safety: For drinking water, prioritize BPA-free materials and FDA/NSF compliance where noted. For non-potable liquids, ensure chemical compatibility with the tank material.
- Space and layout: Vertical tanks save floor space but require vertical clearance; horizontal tanks may fit better in low-ceiling areas or trailers.
- UV exposure and outdoor use: UV-stabilized HDPE or polyethylene helps prevent cracking and sun damage when tanks sit outdoors for extended periods.
- Access and plumbing: Look for built-in fittings, manways, inlets/outlets, and bulkhead options that match your plumbing plans and filtration needs.
- Portability vs. bulk capacity: Larger tanks offer more storage but are heavier and less portable. Consider whether multiple smaller tanks or a single large tank best meets your logistics and space constraints.
- Maintenance and cleanliness: Dark-colored or opaque tanks limit light penetration and algae growth. Consider ease of cleaning with large openings and accessible fittings.
Frequently Asked Questions
- What size tank should I choose for whole-house emergency water storage?
– For a family, many experts suggest planning for several days to weeks of water. If 700 gallons fits your space and budget, it can be a strong bulk option, with room to add additional tanks if needed. - Are plastic tanks safe for drinking water storage?
– Look for BPA-free materials and certifications (FDA/NSF) as noted on product descriptions. UV protection helps maintain water quality in outdoor installations. - Can these tanks be used for rainwater harvesting?
– Yes. Tanks with UV resistance and appropriate fittings are suitable for rainwater collection, filtration, and storage for irrigation or non-potable use. - What maintenance steps are recommended for long-term storage?
– Regular cleaning, inspecting seals and fittings, and ensuring drains and outlets function properly can extend tank life and maintain water quality. - Do these tanks require special foundations?
– Heavy-duty polyethylene tanks typically need level, stable support. For large volumes, concrete pads or reinforced platforms are common, especially for outdoor installations.