
800 Gallon Low-Profile Underground Tank for Shallow Burial and High Groundwater
The Graf Platin 800 Gallon Underground Cistern is the ideal solution for residential rainwater harvesting where excavation depth is limited or groundwater levels are high. Engineered for strength, stability, and easy installation, this low-profile tank delivers reliable underground water storage without the need for deep digging. It includes a 14" telescopic riser, a 26" manway opening, and a secure childproof locking lid — making it both functional and safe.
Whether you're storing water for irrigation, toilets, or emergency use, this tank is optimized for performance and peace of mind, and is guaranteed not to collapse when installed properly.
Warranty: 15-Year Manufacturer Guarantee when installed according to specifications.
The Tank Guaranteed Not to Collapse When Empty* * When installed in compliance with manufacturer's installation instructions.

Platin Tank Features
15 Year manufacturer's warranty
Minimal installation depth
Suitable for vehicle loading (when combined with cast iron lid option)
Groundwater stable to the tank shoulder
Internal pre-filtration option
Grass green telescopic riser and latching lid included
Easy to transport and install
Convenient 26" manway opening
Easy-open access in lid for garden hose connection
800 fully-usable gallons
Ease of installation
Minimum installation depth greatly reduces installation time and cost, while modular components and integrated filter technology make the system easy to assemble.
Ultra-high strength materials and design enable a wide variety of installation options like high groundwater tables, underneath driveways and areas where rock and other obstructions prevent deeper burial.
Telescopic riser tilts up to 5°, making it easy to match existing grade.

Tank Dimensions:

Tank
|
400 Gallons
|
800 Gallons
|
1350 Gallons
|
2000 Gallons
|
Part No. |
390000 |
390001 |
390002 |
390005 |
Weight (approx) |
175 lb. |
375 lb. |
530 lb. |
795 lb. |
Length (l) |
83" |
96" |
114" |
142" |
Width (w) |
49" |
83" |
91" |
89" |
Height of tank shoulder (h) |
28" |
29" |
37" |
49" |
Height of dome collar (hc) |
12.5" |
12.5" |
12.5" |
12.5" |
Ø Manway opening (m) |
26" |
26" |
26" |
26" |
Ø Tank dome (d) |
31.5" |
31.5" |
31.5" |
31.5" |
Return and Refund Policy
If you are not satisfied with your purchase, please send an email to support@thefountaindirect.com or call us to request a Return Material Authorization (subject to manufacturer approval) prior to returning any merchandise. Requests for returns on standard, non-special-order items may be made within 30 days of the item's ship date.
In order to provide our customers the highest quality products at the lowest possible prices, we only accept returned merchandise in "factory new” condition. We must be able to resell the product as new in the condition it is returned to us.