Rainwater harvesting is gaining momentum across Kentucky and the broader Midwest as water conservation becomes increasingly important. Whether you're a homeowner looking to reduce your water bill, a gardener wanting chemical-free irrigation water, or a farmer building resilience against drought, an IBC tote rainwater system is the most cost-effective high-capacity solution available.
Why IBC Totes Are Ideal for Rainwater
Standard rain barrels hold 50-60 gallons. In a moderate rainfall event (1 inch on a 1,000 square foot roof), about 625 gallons of water runs off that roof. A single standard rain barrel captures less than 10% of that runoff. With a 275-gallon IBC tote, you capture nearly half — and with two totes connected in series, you capture most of it.
IBC totes offer several other advantages for rainwater:
System Design Basics
A basic IBC rainwater system has four components:
1. Collection surface — your roof 2. Conveyance — gutters and downspouts 3. Filtration — pre-filter before the tote 4. Storage — the IBC tote(s)
Calculating Your Needs
To determine how many totes you need, calculate your roof runoff:
Runoff (gallons) = Roof area (sq ft) × Rainfall (inches) × 0.623
For example, a 2,000 square foot roof in a 1-inch rain event produces approximately 1,246 gallons of runoff. That's about 4.5 IBC totes of capacity.
In central Kentucky, average annual rainfall is about 46 inches. A 2,000 sq ft roof collects roughly 57,000 gallons per year — far more than most residential systems can store. So don't worry about oversizing; your totes will refill quickly after each use.
Installation Steps
Step 1: Site Selection
Place your IBC tote(s) near a downspout on level, compacted ground. A full 275-gallon tote weighs approximately 2,440 lbs — that's over a ton of weight concentrated on a 48"×40" footprint. The ground must be stable. Consider a concrete pad or compacted gravel base for permanent installations.
Step 2: Elevation
If you plan to gravity-feed from the tote (no pump), elevate it as high as practical. Every foot of elevation gives you approximately 0.43 PSI of water pressure. A tote elevated 4 feet provides about 1.7 PSI — enough for a slow but steady garden hose flow. For better pressure, consider adding a small utility pump.
Step 3: Downspout Connection
The simplest approach is a downspout diverter. This device installs in your existing downspout and redirects water into a pipe that leads to your tote. When the tote is full, excess water continues down the original downspout path.
Connect the diverter output to the tote's top opening. Use a screen or mesh filter at the tote inlet to prevent leaves and debris from entering. A simple 1/4" hardware cloth screen works well for basic filtration.
Step 4: First-Flush Diverter (Recommended)
The first few gallons of rain runoff carry the most contaminants — dust, pollen, bird droppings, and roof debris. A first-flush diverter captures this initial dirty water and diverts it away from your storage tank. After the first-flush volume is captured (typically 1-2 gallons per 100 sq ft of roof), clean water flows to your IBC tote.
First-flush diverters are inexpensive and significantly improve water quality. We strongly recommend them for any IBC rainwater system.
Step 5: Overflow Management
When your tote is full, excess water needs somewhere to go. Install an overflow fitting near the top of the tote (just below the fill line) and route a pipe to a safe discharge point — a rain garden, dry well, or simply back to the ground near the downspout.
Step 6: Dispensing Setup
For gravity dispensing, the tote's existing 2" butterfly valve works perfectly. Add a garden hose adapter (we sell these) to connect a standard hose. For pressurized distribution, install a small 1/2 HP utility pump on the outlet line.
Multi-Tote Systems
For larger capacity, connect multiple IBC totes in series. The simplest method is to connect the overflow of Tote 1 to the inlet of Tote 2, so excess water cascades through the system. For equalized water levels, connect the totes at the bottom with a 2" pipe — water will seek the same level in all connected totes.
Maintenance
Kentucky Regulations
Good news: Kentucky does not restrict rainwater harvesting for residential use. There are no permits required to collect rainwater from your own roof for personal use. However, if you're planning a large commercial system or one that connects to a potable water supply, check with your local building department for applicable codes.
What to Buy from IBC Kentucky
For a basic single-tote rainwater system, you'll need:
We can supply all of these items and even pre-assemble the tote with fittings if you prefer. Contact us for rainwater system pricing.