The Bushman 420 Gallon Vertical Rainwater Harvesting Tank (SKU 45438) is a green vertical storage tank built to collect and hold captured rainwater for irrigation, garden, and non-potable household supply. It stands 64 inches tall on a 47 x 47 inch footprint, so it tucks against a wall or into a corner near a downspout while holding a full 420 gallons. The green tint blocks light to slow algae growth, which matters for rainwater that sits between storms.
Will it work for your site?
Confirm two things before you buy: the footprint and the fill weight. This tank occupies a 47.0 x 47.0 inch square (about 15.3 square feet) and reaches 64 inches at the top, so measure your pad and your gutter or diverter drop height. Water is heavy: filled to 420 gallons this tank carries roughly 3,503 pounds, which works out to about 230 pounds per square foot across the base. The pad must be flat and continuous under the whole footprint — a tank tipping on a soft or uneven edge is the most common poly-tank failure. A compacted gravel pad or a poured slab both work. Our concrete pad sizing guide walks through the ACI framework for above-ground poly tanks, and the Tank Sizing Calculator helps you match tank volume to your roof catchment area and local rainfall. For diverter setup, see our first-flush diverter sizing write-up and the broader rainwater harvesting sizing by state guide.
Fittings and outlet
The technical drawing on this page documents one bulkhead fitting sized at 1 inch NPT. Inlet, overflow, and vent provisions are not specified on the sheet, so confirm those by phone before assuming a second port, and note that 1 inch is a modest outlet for draining 420 gallons by gravity. The bulkhead seals against the tank wall with a gasket — inspect or replace that gasket and use thread sealant, not just tape, on the NPT side to prevent weeping at the connection. Review the technical drawing before ordering hardware so your valve, hose, or pump inlet threads match the 1 inch NPT bulkhead on the first try.
The mistake to avoid
Rainwater harvesting tanks like this one are built for water, not chemical storage. Do not repurpose this tank for fertilizer concentrates, pool chemicals, or any solution heavier than water without confirming a proper specific gravity rating first, which is not published for this tank. Keep it on collected rainwater and irrigation-grade supply. If you need a rain barrel, cistern, or storage tank matched to a different volume, the Tank Sizing Guide and sizing tools above will point you to the right capacity.
This 420 gallon Bushman tank ships LTL freight, quoted live to your ZIP through our Freight Cost Estimator. Get a freight quote for your address, or call 866-418-1777 and we will size the tank, confirm the fittings, and quote the freight with you.
