Three Methods — Choose by Use Case
| Method | Best For | Output Pressure | Flow Rate | Cost |
|---|---|---|---|---|
| Gravity (no pump) | Low-flow irrigation, filling buckets, garden hose at low pressure | 0.43 PSI per foot of elevation (~1 PSI per 2.31 ft) | Depends on elevation and pipe size; 2–5 GPM typical | $0 |
| 12V demand pump | Household fixtures, tiny house plumbing, off-grid living | 40–50 PSI | 3–5 GPM | $50–$100 pump + $200+ solar kit |
| Transfer/utility pump | Filling another tank; short-duration high-volume transfer | Not intended for sustained household pressure | 50–200+ GPM | $80–$300 |
Method 1 — Gravity Feed
The simplest approach: open the 2" ball valve at the bottom of the tote and let gravity do the work. Water flows through the outlet and into your hose or pipe. No power required.
Pressure is determined by elevation: every 2.31 feet of height between the tote outlet and the point of use delivers approximately 1 PSI. A tote sitting at ground level with the outlet 2 feet off the ground delivers less than 1 PSI at the end of a long hose run — enough to fill a bucket slowly, not enough for a shower or household fixture.
When gravity works well: drip irrigation, slow-fill applications, filling a secondary vessel at lower elevation, or any application where 2–5 PSI is sufficient. When it doesn't: any fixture requiring 20+ PSI — showers, most sink faucets, tankless water heaters — need a pump.
Method 2 — 12V Demand Pump
A 12V RV-style demand pump (Shurflo 3.5 GPM is the most commonly used) draws water from the IBC by gravity-assist and pressurizes it to 40–50 PSI. The pump starts automatically when water pressure drops below the cut-in threshold (when a tap opens) and stops when the cut-off pressure is reached.
Connection Steps
- Identify your IBC's bottom valve fitting type: Camlock, 2" NPT, or square thread — these are not interchangeable
- Install the matching adapter (camlock male → female NPT is most common). Apply PTFE tape to any NPT threads
- Connect a short run of reinforced flexible hose (¾" or 1" ID) from the adapter to the pump inlet — flexible hose absorbs pump vibration
- Connect pump outlet to accumulator tank inlet, then to your distribution line
- Connect power (12V battery or solar); open the IBC ball valve; prime the pump if needed (most 12V demand pumps are self-priming)
Troubleshooting Common Pump Problems
| Problem | Cause | Fix |
|---|---|---|
| Pump runs, no water | Ball valve closed; airlock; prime lost; camlock not fully seated | Open IBC valve fully; manually prime the pump inlet; re-seat camlock with both levers locked |
| Pump pulses at partial flow | No accumulator tank | Install 1–2 gallon accumulator between pump outlet and distribution |
| Pump won't reach cut-off pressure | Leak in system; undersized supply hose; worn pump valves | Check all connections; verify no open valves or drips; upsize supply hose to 1" minimum |
| Check valve failure / backflow | Foot valve or check valve failed; pump loses prime when idle | Replace check valve; locate it correctly on inlet line (not outlet) |
| Low flow rate despite full tote | Supply hose too small; too many fittings in suction line | Use non-collapsible 1" hose; eliminate unnecessary fittings; keep run under 3 feet |
| IBC draining faster than expected | Leak at fitting; drain valve not fully closed | Inspect all connections; verify ball valve is fully closed when not in use |