The Bushman 100 Gallon Vertical Rainwater Harvesting Tank in black is a compact above-ground catchment tank built for collecting and storing roof runoff at homes, cabins, garden plots, and remote sites where a full-size cistern won't fit. It stands 42 inches tall on a 30-by-30-inch footprint, so it tucks against a wall, under a downspout, or beside an outbuilding while still holding a usable 100 gallons of harvested rain. The black exterior blocks light to slow algae growth in stored water, a practical detail for any rainwater catchment tank kept outdoors.
Will it work for your setup?
This is a vertical storage tank with a 30-inch diameter and 42-inch height. Filled to capacity, 100 gallons of water weighs roughly 834 pounds. Think of the plumbing as a connection map: one 3/4-inch bulkhead outlet with a polypropylene body and EPDM gasket comes ready for your draw line, a 3-inch overflow outlet kit handles peak discharge, and two blank flat fitting pads (8" x 7" and 8" x 6") are sited for you to field-drill and add your own bulkheads or inlet where your setup needs them. The technical drawing on this page shows those flat pads and outlet locations. The EPDM gasket on the 3/4-inch bulkhead is well matched to rainwater and general water service - keep this tank on water, since EPDM is not suited to petroleum or hydrocarbon lines. If you're matching tank volume to your roof area and local rainfall, run the numbers with our Tank Sizing Calculator and Tank Sizing Guide before you buy.
Sizing your rainwater system
A 100-gallon tank is a starter-scale catchment volume - well suited to hand-watering a garden, topping off a livestock trough, or capturing first-flush-diverted rain from a small roof section. Size the overflow and first-flush hardware to the tank, not the other way around; our walkthrough on first-flush diverter sizing per the Texas Manual on Rainwater Harvesting covers the method. If you're weighing capacity against regulations and rainfall where you live, see rainwater harvesting tank sizing by state.
The mistake to avoid
Two things trip people up on a tall, narrow tank like this. First, the pad: 834 pounds spread over a 30" x 30" footprint is only about 0.93 psi, trivial for a slab to carry - but the 42-inch height against a 30-inch width gives this tank a 1.4-to-1 profile, so a dead-level base is a tip-over concern, not just a settling one. Our concrete pad sizing guide walks through the ACI 360R-10 framework if you're pouring a slab. Second, don't skip or undersize the overflow. The overflow kit is deliberately 3 inches while the draw outlet is only 3/4 inch - that gap lets peak storm inflow leave the tank faster than it enters, so water never pressurizes the top ring. Route that overflow away from the pad so heavy-storm discharge doesn't undermine the base you just built.
This tank ships LTL freight, palletized, and freight is quoted separately to your ZIP - never rolled into the list price. Get a live rate with our Freight Cost Estimator, or call 866-418-1777 and we'll help you size the rainwater system and book the shipment.
