Graf Herkules™ 430 Gallon Complete Rainwater System
The Most Versatile Starter Tank on the Market, Above Ground or Underground
Looking for a complete, hassle-free solution to store rainwater underground? The Graf Herkules™ 430 Gallon Complete System comes with everything you need: the tank, structural support column, 8" riser, and access dome. It’s purpose-built for homeowners who want to install a clean, efficient system with minimal digging and zero guesswork.
The tank is lightweight (only 130 lbs), fits through tight spaces like 32" doorways, and can be buried up to 40 inches deep, even in high groundwater zones. It’s ideal for basements, under decks, or in small backyards where space is limited.
This is not just a tank, it’s a fully integrated system that’s expandable, easy to install, and designed to grow with you. Whether you're starting with one or planning to connect more tanks in the future, this system sets you up with everything you need to collect, store, and use rainwater smarter.

Return & Refund Policy
If you are not satisfied with your purchase, please contact us and request a Return Material Authorization prior to returning any merchandise. Requests for returns for standard non-special-order items may be made within 30 days of the item's ship date.

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