Emergency
water
reserve.
Rebottled or documented food grade only for potable storage. Tell us how many people and how many days and we will size it.
One rebottled 275 gallon tote covers four people for about a month at one gallon each per day, or a fortnight at a realistic two. Use a rebottled unit — a new virgin bladder in a reclaimed cage, $340–$430 — or a documented food-grade unit at $225–$340. Keep it opaque, cool, sealed and on a dated rotation. Never store potable water in a technical-grade tote.
Step 1 — size it against days, not gallons
The standard planning figure is one gallon per person per day for drinking and minimal sanitation. It is austere: it assumes no washing beyond the essential, no laundry, no livestock and careful cooking. Two gallons per person per day is the number to plan on if you want the reserve to feel like water rather than rationing.
| Household and duration | Storage needed |
|---|---|
| 2 people, 14 days, 1 gal/day | 28 gal — a drum will do |
| 4 people, 14 days, 2 gal/day | 112 gal — one tote, part filled |
| 4 people, 30 days, 1 gal/day | 120 gal — one tote |
| 4 people, 30 days, 2 gal/day | 240 gal — one tote |
| 4 people, 90 days, 2 gal/day | 720 gal — three totes |
| Small clinic, 20 people, 7 days | 280 gal — two totes |
| Farm with livestock | Calculate stock demand separately — it dominates |
Step 2 — choose the vessel honestly
Rebottled is our recommendation for potable reserve. A brand-new virgin HDPE bladder from an FDA-compliant resin, in a reclaimed, blasted and zinc-recoated cage. The contact surface has held nothing but air, so there is no provenance conversation to have with a health department or an insurer — and the 80 lb of steel stays in service rather than going to a shredder.
Documented food grade is cheaper and perfectly sound if you are comfortable with the paperwork: an edible prior-contents record tied to the serial number, a CIP wash certificate with cycle data, and an air-hold test result.
Technical grade is not acceptable for potable storage under any circumstances. It is the right tote for the firefighting reserve next to it, and the wrong one for the water you will drink.
Step 3 — site it before you fill it
- Floor loading. 2,330 lb over 13.3 sq ft is 175 lb/sq ft. Fine on a ground-floor slab; check a mezzanine; do not use an older timber upper floor.
- Cool and dark. Temperature stability slows everything biological. Dark stops algae. A basement or an interior garage wall is ideal.
- Accessible. You need to reach the valve with a container under it, which means either a stand or a tote sited where a bucket fits. A 24-inch stand is $180 and makes drawing off genuinely practical.
- Not next to chemicals. HDPE is permeable to vapour. Do not store potable water beside solvents, fuel or pesticides — the water will take on what is in the air around it.
Step 4 — fill and disinfect
- Rinse the new bottle with potable water and drain it through the valve.
- Fill from a potable supply through a food-grade hose — not a garden hose, which leaches and tastes of it.
- Leave 2% headspace minimum, 5% if the space is uninsulated and 10% if it can freeze.
- Disinfect to the level your supply needs. Municipal chlorinated water generally needs nothing. Well water typically wants a dose bringing free chlorine to about 2 ppm at fill.
- Cap with a sealed or vented cap as appropriate and cap the valve outlet.
- Write the fill date on the tote. Not on a label that falls off — on the cage, in paint pen.
Step 5 — rotate on a date
Water does not expire chemically. What changes is biology, and that depends on light, temperature and what got in at fill. Kept opaque, cool, sealed and properly disinfected, a 12-month rotation is comfortable and 24 months is defensible.
Rotate by using it: irrigate the garden, wash the vehicles, fill the stock trough, then refill. A reserve you have never cycled is a reserve you do not know works. Cycling also tells you the valve still seals and the stand still holds.
Step 6 — plan how you will actually draw it
In the event, you will want water into a 5-gallon container, repeatedly, probably in the dark. That means a valve at a height a bucket fits under, a short hose on an adapter, and ideally a hose bib rather than a 2-inch butterfly you cannot modulate. A buttress-to-garden-hose adapter is $9 and a hose bib assembly is not much more — fit them when you build it, not when you need it.
Step 7 — freeze protection
Water expands about 9% on freezing. A brim-filled tote in an unheated space will bulge against the cage and stay bulged. Either keep it somewhere above freezing, leave 10% headspace, or accept that it is a three-season reserve and drain it in November.
Build cost
| Item | Price |
|---|---|
| 1 × 275 gal rebottled tote | ≈$385 |
| or 1 × 275 gal food grade | ≈$280 |
| Welded stand, 24 in | $180 |
| Buttress → garden hose adapter | $9 |
| Vented 6 in cap | $14 |
| UV sleeve, if any daylight | $38 |
| Food-grade fill hose | ≈$40 |
Rotation log
- Fill date
- Paint-pen on the cage
- Rotate at
- 12 months (24 max)
- Check
- Valve seal, cap, stand, sleeve
- Cycle by
- Irrigating or washing, then refill
- Record
- Date, source, disinfection dose
Hard no
Technical-grade totes. Unlabelled totes. Anything with a non-food prior content. Anything whose data plate you cannot read. For potable water the only acceptable answers are documented food grade and rebottled.
Rebottled standardWater storage questions
Why rebottled rather than a used food-grade tote?
Both work, and food grade is cheaper. Rebottled removes an argument: a brand-new virgin bladder has no fill history at all, so there is nothing for a health department, an insurer or a nervous family member to question. If you can get documented food-grade stock and you are comfortable with the paperwork, buy that and save about $100 a unit.
How much water should I store?
The common planning figure is one gallon per person per day for drinking and basic sanitation, and that is austere. Two gallons is realistic if anyone is washing, cooking or caring for an animal. A single 275 gallon tote therefore covers a family of four for about a month at one gallon each, or a fortnight at two.
How long does stored water keep?
Indefinitely in chemical terms — water does not expire. What degrades is the biological state: any organic matter or light ingress lets something grow. Properly disinfected, sealed, opaque and kept cool, a 12-month rotation is comfortable and a 24-month rotation is defensible. Rotate on a date, not on how it looks.
Can I store it outside?
Only with shade and freeze management. UV embrittles the bottle and grows algae even through a lightly translucent wall, and a brim-full tote will deform permanently if it freezes. Indoors on a ground-floor slab is best; under cover on the north side of a building is acceptable with a UV sleeve.
Will my floor take it?
A filled 275 gallon tote is about 2,330 lb over 13.3 square feet — roughly 175 lb per square foot. That is fine on a typical ground-floor concrete slab, marginal on a steel mezzanine rated 125–250, and not acceptable on an older timber upper floor. Check before you fill, not after.
How many people, how many days?
Those two numbers size the reserve. We will quote rebottled and food grade side by side so you can choose.