SHTFandGO Gravity Well Nano UF Membrane Water Filter — 7-Gallon Emergency Filtration System
Gravity Well Nano Membrane Water Filter — 7-Gallon Off-Grid Water Filtration System
Water filtration without relying on grid power. When municipal water is unavailable, the SHTFandGO Gravity Well Nano combines an ultrafiltration (UF) membrane with a secondary filtration stage in a portable, gravity-fed water treatment system. It is designed for emergency preparedness, homesteading, off-grid cabins, and camping.
Current supplier status: SHTFandGO confirmed availability of the Nano Gravity Well in its November 5, 2026 dealer update. Orders are subject to final supplier acceptance and dispatch confirmation; no exact shipment date is guaranteed.
Why choose the Gravity Well Nano?
- 0.02-micron UF membrane: A physical filtration stage intended to capture fine suspended particles and many microbial contaminants. Actual removal performance depends on source-water conditions and proper operation; ask us for available manufacturer test data if you need a particular contaminant reduction rating.
- Two-stage treatment: A washable Nano UF membrane works with the included three-stage secondary filter. The manufacturer also offers a stainless steel bone-char secondary filter configuration; contact us for price and availability of that version.
- Gravity-fed operation: Treat water without electricity. A hand air pump is included for pressure-assisted flow when desired.
- Family-size capacity: Two stackable, BPA-free 3.5-gallon containers provide 7 gallons of total container volume, with an easy-dispense faucet.
- Portable and versatile: USA-made containers, screw-down lids, and a paracord handle; the UF membrane may also be used separately as a personal filter with the manufacturer's tubing setup.
What comes with the three-stage-filter configuration?
- Nano ultrafiltration membrane
- Stainless steel J-tube manifold
- Three-stage secondary filter and adapter
- Hand air pump
- Dispensing faucet
- Two BPA-free containers with gasketed lids
- Paracord handle
Specifications
| System | Gravity-fed Nano membrane filter with secondary three-stage filter |
|---|---|
| Capacity | 7 gallons total across two 3.5-gallon containers |
| Membrane pore size | 0.02 micron (manufacturer specification) |
| Output | Manufacturer reports up to 12+ gallons/hour when pressure-assisted; actual flow varies |
| Approximate dimensions | 18 × 14 × 14 inches |
| Approximate weight | 15 lb |
| Membrane service life | Manufacturer estimates up to 20,000+ gallons with proper use and care; water quality affects life |
| Power | No electricity required for gravity filtration; manual hand pump included |
Important: Filtration is not distillation or desalination
The Gravity Well Nano is a water filtration system, not a distiller. Unlike the Gravi-Stil, it does not remove dissolved salts from seawater and should not be used to make saltwater drinkable. No single filter removes every chemical contaminant; verify that the selected filter is appropriate for your source water.
Questions before ordering?
Not sure whether you need filtration, UV treatment, or seawater desalination? Contact Prepper Hideout and tell us your water source and intended use. We'll help you choose the correct system.