The Bushman 330 Gallon Mocha Rainwater Collection Storage Tank is a polyethylene rainwater tank built for above-ground water storage, holding 330 gallons in a compact 41 by 41 inch footprint. At 63 inches tall, it slots into tight side yards, garage corners, and patio edges where a wider water storage tank won't fit, and its opaque Mocha wall doesn't just blend into exterior walls and landscaping - it blocks light penetration, which suppresses the algae growth that plagues translucent or light-colored tanks holding standing rainwater. Whether you're collecting roof runoff for irrigation, garden use, or a rural water reserve, this is a straightforward, durable storage tank that does the job without complication.
Will it work for my site?
Capacity is 330 gallons across a 41.0 x 41.0 inch footprint at 63 inches tall. Filled to the brim, the tank and its water weigh about 2,752 pounds, so plan your base accordingly: a level, fully supported pad rated for that load is the difference between a tank that lasts decades and one that leans or cracks at the base. For a slab under an above-ground poly tank, the engineering boundaries are walked through in our guide to concrete pad sizing for above-ground polyethylene tanks. The tank is built in polyethylene and carries a 1.0 specific gravity rating, which is correct for water and rainwater service - it is rated for water-density contents only, so anything heavier than water (most liquid fertilizers, brines, and chemicals) exceeds its rating and calls for a properly SG-rated tank instead. The drawing for this tank shows a 1-inch bulkhead fitting (part 60427); see the technical drawing on this page for the fitting location and exact dimensions before you plumb your inlet, overflow, and draw lines.
Sizing it right
If you're matching tank volume to roof area, rainfall, and draw rate, run your numbers through the Tank Sizing Calculator and review the Tank Sizing Guide before you commit. Rainwater harvesting works best when the storage volume is paired with proper inlet filtering and a first-flush diverter; our Bushman rainwater harvesting first-flush diverter sizing guide sizes that diverter using the Texas Manual on Rainwater Harvesting. Putting this tank into a larger reuse setup with grey-water or HVAC condensate? The industrial water reuse tank topology guide covers how to band and sequence storage. For rural fire-reserve duty, the fire-water reservoir design guide walks the NFPA 22 sizing discipline and cold-climate freeze protection.
The mistake to avoid
The most common error on a tank this size is the foundation. A base carrying nearly 2,752 pounds when full needs continuous, level support across the entire 41 x 41 inch footprint, not corner blocks or a partial pad. Set it on uneven or unsupported ground and the bottom takes uneven stress. The flip side matters too: an empty poly tank this tall and narrow is light and easy to tip, so anchor or strap it against wind until it's filled, especially on exposed or elevated installs. When you plumb the 1-inch bulkhead outlet, remember it seals through the tank wall with a gasket and backing nut - seat the gasket properly and snug the connection hand-tight plus a quarter turn rather than over-torquing, which distorts the poly wall and starts leaks. Confirm your pad is level and rated for the full water weight before you fill, and route the outlet line so it's supported and not hanging weight on the fitting.
This tank ships LTL freight from a single West Coast plant in Temecula, CA, so buyers east of the Rockies should expect longer transit and higher freight - get a real number up front with freight quoted live to your ZIP through our Freight Cost Estimator or by phone at 866-418-1777. Listed at the price shown, before freight. Get your freight estimate in seconds with the estimator, or call and we'll quote it with you.
