Build a 275-gallon rainwater catchment
A complete build from a Grade C tote, with a parts list, a stand that will not sink, a first-flush diverter, overflow to a second tote and a winterising plan that survives a York County February.
Quote a tote or a finished kit
Tell us whether it is for edibles — that decides which prior-service stock we can send you.
Tell us what you have.
We will tell you what it is worth.
Buying, selling, washing, hauling or recycling — one form covers all of it. Replies come from a specialist in York, PA, by email, inside one business day.
Prefer plain email? Write to info@ibctotesreco.com — include your ZIP, quantity and what the totes last held.
Use a Grade C tote — documented edible prior service if the water will touch food crops. Put it on a level, load-bearing stand (a full tote is about 2,350 lb). Fit a first-flush diverter, a screened inlet, a bulkhead spigot and an overflow routed away from your foundation. Block all light to stop algae and triple the bottle's life. Drain or two-thirds fill with a vented lid before the first hard freeze.
Before you start: the two decisions that matter
Will the water touch anything you eat? If yes, the tote must have documented edible prior service. This is not fussiness — a container that held liquid fertiliser or crop protection is permanently unsuitable for edible-crop irrigation, and no washing changes that. Why that is permanent.
How much roof are you collecting from? Roughly 0.6 gallons per square foot per inch of rain after losses. A 1,000 sq ft roof section produces about 600 gallons from a single inch — so one 275-gallon tote will fill and overflow in a moderate storm. Decide now whether you are building a one-tote system or the first tote of a four-tote array, because the manifold is trivial to build at the start and tedious to retrofit.
Build the stand first
A filled 275-gallon tote is about 2,350 lb on a 48 × 40 inch footprint — roughly 180 lb per square foot. That will sink into lawn, settle unevenly on bare soil and rack the cage. Build on a compacted gravel pad, concrete pavers bedded level, or a timber frame on footings. Elevation buys you gravity pressure: every foot of height is about 0.43 psi, so a stand 3 feet high gives you around 1.3 psi at the outlet — enough for a soaker hose, not enough for a sprinkler.
Fit a screened inlet
Cut or adapt the 6-inch lid to take a downpipe, with stainless or fibreglass insect mesh across the opening. Mesh does two jobs: it keeps leaves and grit out, and it keeps mosquitoes from breeding in your reservoir, which in a hot August is not a theoretical concern. Keep the mesh accessible — it needs clearing after every storm in autumn.
Install a first-flush diverter
The first few gallons off a roof carry the accumulated dust, pollen, bird droppings and roofing grit of however long it has been dry. A first-flush diverter is a vertical pipe section that fills before water reaches the tank and then drains slowly through a small orifice. Size it at roughly 1–2 gallons per 100 sq ft of roof. It is the single biggest improvement you can make to stored water quality and it costs almost nothing.
Fit the outlet and a bulkhead spigot
The existing 2-inch S60x6 outlet takes a standard valve plus an adapter to garden hose thread — a 3/4-inch GHT adapter is the most common part we sell. If you want a second, higher draw-off point, fit a bulkhead fitting through the wall rather than drilling and hoping: a proper bulkhead with a gasket either side seals reliably, and a self-tapping fitting into a 60-mil HDPE wall does not.
Plumb the overflow properly
This is the step people skip and regret. A full tote in a storm will overflow, and if that overflow is at the lid it will run down the side of the container and into whatever the tote is standing next to — frequently a house foundation. Fit a 2-inch overflow at the top of the bottle, piped away from the structure, or to the inlet of a second tote. Never rely on the lid as an overflow.
Link a second and third tote, if you have the roof for it
Two totes side by side, connected low with a 2-inch bulkhead and a short flexible hose, equalise and behave as one 530-gallon vessel. Connect the overflow of the last one to a soakaway. A four-tote array on a 96 × 80 inch pad gives you 1,060 gallons and weighs 9,400 lb filled — check that your pad and your ground can take it.
Block the light
Paint the exposed faces with an exterior-grade coating in a dark colour, wrap it in a UV-stable cover, or build a simple shade structure. This stops algae completely and roughly triples the bottle's own service life, because UV is what destroys polyethylene — not water, not age, not frost.
Winterise before the first hard frost
Either drain the tote entirely, or leave it no more than two thirds full with a vented lid so expanding ice has somewhere to go. Remove or insulate the valve, the adapter and any hose: fittings and small-bore plumbing freeze solid long before 265 gallons of water does, and a cracked valve boss writes off the container.
What a one-tote build takes
| Part | Qty | Note |
|---|---|---|
| Grade C IBC tote, 275 gal | 1 | Edible prior service if irrigating food |
| 2" butterfly valve, EPDM | 1 | Often already fitted |
| S60x6 to 3/4" GHT adapter | 1 | Garden hose connection |
| Insect mesh, stainless or fibreglass | 1 sheet | Across the inlet |
| Downpipe adapter / diverter kit | 1 | To suit your gutter |
| First-flush diverter pipe & fittings | 1 | 1–2 gal per 100 sq ft of roof |
| 2" bulkhead fitting | 1–2 | Overflow, and optional high draw-off |
| 2" overflow pipe & elbows | as needed | Routed away from the foundation |
| Exterior coating or UV cover | 1 | Non-negotiable for stored water |
| Compacted gravel, pavers or timber frame | 1 pad | 180 lb per sq ft, level |
| Vented lid | 1 | For winter and for drawn-down use |
| Hose, soaker or lay-flat | 1 | Gravity pressure is low |
Five mistakes that end in a ruined tote
- Standing it on grass or soil. It sinks, unevenly, and the cage goes out of square. Then it will not stack, will not sit level, and the bottle carries load it was not designed to carry.
- Leaving it full and sealed through a freeze. The most common write-off by a wide margin.
- No overflow. Storm water runs down the container and into a foundation or a crawl space. Expensive, and entirely preventable with a $15 fitting.
- Leaving it clear. Algae within weeks, a chalky brittle bottle within three summers.
- Self-tapping fittings into the wall. A 60-mil HDPE wall will not hold a threaded fitting reliably under head pressure. Use a bulkhead with gaskets both sides, or use the moulded outlet you already have.
Beyond irrigation
The same build, with a 2.5-inch adapter on the outlet, is a perfectly serviceable fire-suppression reserve for a rural property — a pumper can draft from it, and several of our customers keep a four-tote array at the end of a long driveway for exactly that reason. With a heater jacket it becomes a winter livestock water supply. With a shallow cut and a wicking medium it becomes a self-watering raised bed.
All of which is the point of keeping Grade C containers out of the granulator: a bottle too stained to hold product will hold rainwater for fifteen years.
| Roof area | 0.5" | 1" | 2" |
|---|---|---|---|
| 200 sq ft | 60 gal | 120 gal | 240 gal |
| 400 sq ft | 120 gal | 240 gal | 480 gal |
| 600 sq ft | 180 gal | 360 gal | 720 gal |
| 1,000 sq ft | 300 gal | 600 gal | 1,200 gal |
| 1,500 sq ft | 450 gal | 900 gal | 1,800 gal |
| 2,000 sq ft | 600 gal | 1,200 gal | 2,400 gal |
At roughly 0.6 gal per sq ft per inch after losses. York County averages about 42 inches of precipitation a year, so a 1,000 sq ft roof section sheds roughly 25,000 gallons annually — vastly more than one tote can hold.
Rainwater FAQ
How much rain will a 275 gallon IBC tote actually collect?
Roughly 0.6 gallons per square foot of roof per inch of rain, after losses. A 1,000 sq ft roof section yields about 600 gallons from one inch of rainfall — which means a single 275-gallon tote fills and overflows in a moderate storm. If you have real roof area, plan for two or four totes manifolded together from the start; it is far easier than adding them later.
Which grade of tote should I use for rainwater?
Grade C is ideal and the cheapest sound container available anywhere. For garden irrigation of edibles, insist on documented edible prior service — a fertiliser or crop-protection tote is permanently unsuitable for anything you will eat, no matter how it is washed. For non-edible use, lawn and ornamental irrigation, washing or fire water, industrial-prior Grade C is fine.
How do I stop algae growing in the tote?
Block the light. A natural HDPE bottle is translucent, and stored water in sunlight grows algae within weeks. Paint the cage side with an exterior-grade coating, wrap it in a dark UV-stable cover, or build it under cover. Blocking light also roughly triples the bottle's own service life, since UV is what destroys polyethylene.
Will the tote survive a hard freeze?
Only if you do not leave it full and sealed. Water expands about 9% on freezing, and a full sealed tote will bulge, split a wall panel or blow out the valve boss. Either drain it before the first hard frost, or leave it no more than two-thirds full with a vented lid, and insulate or remove the valve and plumbing — the fittings freeze long before the bulk does.
Is harvested rainwater safe to drink?
Not without treatment, and not from a used IBC without a great deal more care than this guide covers. Roof runoff carries particulates, bird droppings, and whatever is on your roofing material. Treat this as irrigation, washing and fire-suppression water. If you genuinely want potable storage, use a rebottled tote with a virgin bottle, keep it fully shaded, and treat the water properly.
Do I need a permit?
In Pennsylvania and most of the eastern US, domestic rainwater harvesting for garden use is unregulated and encouraged. Some western states have historically restricted it under water-rights doctrine, and any plumbed connection to a building's water system is a plumbing-code matter wherever you are. Check locally before you connect anything to a structure.
Related pages
Yields, loads, pressures and parts
Everything you need to size a system before buying anything, including the pad calculation that most failed arrays got wrong.
| Roof area | 0.5" | 1" | 2" | Annual |
|---|---|---|---|---|
| 200 sq ft | 60 gal | 120 gal | 240 gal | ≈ 5,000 gal |
| 400 sq ft | 120 gal | 240 gal | 480 gal | ≈ 10,000 gal |
| 600 sq ft | 180 gal | 360 gal | 720 gal | ≈ 15,000 gal |
| 1,000 sq ft | 300 gal | 600 gal | 1,200 gal | ≈ 25,000 gal |
| 1,500 sq ft | 450 gal | 900 gal | 1,800 gal | ≈ 38,000 gal |
| 2,000 sq ft | 600 gal | 1,200 gal | 2,400 gal | ≈ 50,000 gal |
| 3,000 sq ft | 900 gal | 1,800 gal | 3,600 gal | ≈ 75,000 gal |
| Array | Usable storage | Footprint | Filled weight | Covers a 1" event on |
|---|---|---|---|---|
| One 275 gal | 265 gal | 48 × 40" | ≈ 2,350 lb | ≈ 440 sq ft of roof |
| Two 275 gal | 530 gal | 96 × 40" | ≈ 4,700 lb | ≈ 880 sq ft |
| Three 275 gal | 795 gal | 144 × 40" | ≈ 7,050 lb | ≈ 1,320 sq ft |
| Four 275 gal | 1,060 gal | 96 × 80" | ≈ 9,400 lb | ≈ 1,760 sq ft |
| Two 330 gal | 640 gal | 96 × 40" | ≈ 5,670 lb | ≈ 1,070 sq ft |
| One 550 gal | 532 gal | 48 × 48" | ≈ 4,690 lb | ≈ 890 sq ft |
Which tote, and what to bolt to it
If the water touches anything edible, the container must have documented edible prior service. Everything else is plumbing.
Prior-service eligibility — the permanent disqualifications
| Prior product | Family | Food-grade eligible? | Programme | Best grade | Seal | Note |
|---|---|---|---|---|---|---|
| Apple juice concentrate (70 Bx) | Food & beverage | Yes | PF | A | FDA EPDM | Best inbound stock we see; sugars rinse clean |
| Orange juice concentrate | Food & beverage | Yes | PF | A | FDA Viton | Citrus oil fraction can scent the bottle |
| Grape juice concentrate | Food & beverage | Yes | PF | A | FDA EPDM | Watch for tartrate scale at the outlet |
| Liquid sugar / sucrose syrup | Food & beverage | Yes | PF | A | FDA EPDM | Hot rinse only, no caustic needed |
| High-fructose corn syrup | Food & beverage | Yes | PF | A | FDA EPDM | Viscous; 3" outlet helps decanting |
| Molasses | Food & beverage | Yes | PF | A | FDA EPDM | Heated rinse; heavy heel |
| Honey | Food & beverage | Yes | PF | A | FDA EPDM | Crystallises; heater jacket recommended |
| Maple sap | Food & beverage | Yes | PF | A | FDA EPDM | Benign but sugars feed biofilm fast |
| Maple syrup | Food & beverage | Yes | PF | A | FDA EPDM | Hot rinse; inspect lid seat |
| Apple cider | Food & beverage | Yes | PF | A | FDA EPDM | Vented lid essential — ferments |
| Wine / must | Food & beverage | Yes | PF | A | FDA EPDM | Tartrate scale; usually leased |
| Beer / wort | Food & beverage | Yes | PF | A | FDA EPDM | Stainless preferred for repeat service |
| Brine (pickling liquor) | Food & beverage | Yes | PF | A | FDA Viton | Check cage for chloride attack |
| Vinegar, 10% | Food & beverage | Yes | PF | A | FDA EPDM | Easy; acid-resistant seal needed |
| Soy sauce | Food & beverage | Yes | PF | A | FDA Viton | Salt plus colour; monitor ghosting |
| Edible soybean oil | Food & beverage | Yes | P2 | A | FDA Viton | 140°F minimum or fat re-deposits |
| Edible canola oil | Food & beverage | Yes | P2 | A | FDA Viton | As above |
| Olive oil | Food & beverage | Yes | P2 | A | FDA Viton | Polyphenols can tint the wall |
| Glycerine, USP | Food & beverage | Yes | PF | A | FDA EPDM | Often effectively first-use stock |
| Propylene glycol, food grade | Food & beverage | Yes | PF | A | FDA EPDM | Frequently single-product filler stock |
| Liquid egg | Food & beverage | Case by case | PF | A | FDA EPDM | Protein film needs verification |
| Milk / dairy intermediate | Food & beverage | Case by case | PF | A | FDA EPDM | Allergen changeover record required |
| Whey concentrate | Food & beverage | Case by case | PF | A | FDA EPDM | Protein scale; hot detergent |
| Tomato paste | Food & beverage | Yes | PF | A | FDA Viton | Acidic; stains but rinses |
| Fruit purée | Food & beverage | Yes | PF | A | FDA EPDM | Pulp load; coarse settling matters |
| Flavour concentrate / essence | Food & beverage | No | Refused | Rebottle | PTFE | Permeates HDPE permanently — use stainless |
| Citrus terpene oil | Food & beverage | Never | Refused | Recycle | PTFE | One batch ends a poly bottle's usefulness |
| Spent grain slurry | Food & beverage | No | P2 | B | EPDM | By-product duty; 3" outlet strongly advised |
| Yeast slurry | Food & beverage | Case by case | P2 | B | EPDM | Vent — active fermentation |
| UAN 32 liquid nitrogen | Agricultural | Never | P1 | B | EPDM | Rinses readily; dense — check ratings |
| UAN 28 | Agricultural | Never | P1 | B | EPDM | As above |
| Liquid starter 10-34-0 | Agricultural | Never | P1 | B | EPDM | Polyphosphate scale at the outlet |
| Ammonium thiosulphate | Agricultural | Never | P1 | B | EPDM | Sulphur odour persists faintly |
| Potassium thiosulphate | Agricultural | Never | P1 | B | EPDM | Very dense; 275 format only |
| Calcium nitrate solution | Agricultural | Never | P1 | B | EPDM | Crystallises when cold |
| Humic / fulvic acid | Agricultural | Never | P2 | B | EPDM | Dark staining, usually washes out |
| Fish hydrolysate fertiliser | Agricultural | Never | P3 | C | Viton | Odour frequently permanent |
| Foliar micronutrient blend | Agricultural | Never | P1 | B | EPDM | Metal salts can tint the wall |
| Glyphosate concentrate | Agricultural | Never | P3 | C | Viton | Labelled rinse programme governs |
| 2,4-D amine concentrate | Agricultural | Never | Refused | Per label | Viton | Label prescribes rinse-and-destroy |
| Crop oil adjuvant | Agricultural | Never | P3 | C | Viton | Attacks EPDM; permeates slowly |
| Surfactant adjuvant (NIS) | Agricultural | Never | P1 | B | EPDM | Foams heavily on transfer |
| Molluscicide suspension | Agricultural | Never | Refused | Per label | Viton | Refused — labelled destruction |
| Livestock drinking water | Water & inert | Yes | P1 | A | EPDM | Effectively first-use |
| Irrigation water | Water & inert | Yes | P1 | A | EPDM | May carry silt; coarse settling |
| Sodium hydroxide 50% | Industrial chemistry | Never | P1 | B | EPDM | 3,497 lb filled — check every rating |
| Sodium hydroxide 25% | Industrial chemistry | Never | P1 | B | EPDM | Easy wash; dilute and drain |
| Potassium hydroxide 45% | Industrial chemistry | Never | P1 | B | EPDM | As NaOH; dense |
| Sulphuric acid 93% | Industrial chemistry | Never | Refused | Dedicated | PTFE | 4,182 lb filled; dedicated service only |
| Sulphuric acid 35% | Industrial chemistry | Never | P1 | C | PTFE | Fume attack on cage galvanising |
| Hydrochloric acid 31% | Industrial chemistry | Never | P1 | C | PTFE | Cage usually the limiting factor |
| Phosphoric acid 75% | Industrial chemistry | Never | P1 | B | PTFE | Dense; viscous at low temperature |
| Nitric acid 42% | Industrial chemistry | Never | Refused | Dedicated | PTFE | Oxidiser — embrittles HDPE |
| Hydrogen peroxide 35% | Industrial chemistry | Case by case | P1 | B | PTFE | Vent; absolutely no contaminants |
| Sodium hypochlorite 12% | Industrial chemistry | Never | P1 | B | EPDM | Degasses; vent and shield from UV |
| Ferric chloride 40% | Industrial chemistry | Never | P2 | C | Viton | Heavy orange staining is permanent |
| Aluminium sulphate | Industrial chemistry | Never | P1 | B | EPDM | Scale at the outlet boss |
| Polyaluminium chloride | Industrial chemistry | Never | P1 | B | EPDM | Gels if allowed to dry out |
| Propylene glycol coolant | Industrial chemistry | Never | P1 | B | EPDM | Ideal duty; nothing to watch |
| Ethylene glycol | Industrial chemistry | Never | P1 | B | EPDM | Toxic — never re-grade for potable |
| Calcium chloride brine 32% | Industrial chemistry | Never | P1 | B | Viton | Chloride attack on lower cage |
| Magnesium chloride de-icer | Industrial chemistry | Never | P1 | B | Viton | As above; rinse frames each spring |
| Potassium acetate de-icer | Industrial chemistry | Never | P1 | B | EPDM | Benign; airport runway chemistry |
| Urea solution (DEF) | Industrial chemistry | Never | P1 | B | EPDM | Purity-critical next fill; usually dedicated |
| Nickel plating solution | Industrial chemistry | Never | Refused | Recycle | Viton | Metal-bearing; never re-used |
| Chromic acid solution | Refused | Never | Refused | Refused | PTFE | Not accepted at the gate |
| Cyanide plating bath | Refused | Never | Refused | Refused | PTFE | Acutely hazardous — licensed facility only |
| Phosphate conversion coating | Industrial chemistry | Never | P2 | C | Viton | Scale and staining |
| Amine corrosion inhibitor | Industrial chemistry | Never | P2 | B | Viton | Fish-like odour can persist |
| Sodium silicate | Industrial chemistry | Never | P3 | C | EPDM | Sets hard if dried; wash promptly |
| Polymer flocculant emulsion | Industrial chemistry | Never | P3 | C | EPDM | Extremely slippery; gels with water |
| Sodium bisulphite | Industrial chemistry | Never | P1 | B | EPDM | Sulphur odour; vent |
| Antifoam silicone emulsion | Industrial chemistry | Never | P3 | C | Viton | Film is very hard to remove |
| Latex paint, white | Coatings & inks | Never | P3 | C | EPDM | Heavy ghosting; often rebottle |
| Latex paint, tinted | Coatings & inks | Never | P3 | C | EPDM | Pigment ghosting permanent |
| Water-based pigment dispersion | Coatings & inks | Never | P3 | C | EPDM | Strong colour transfer into the wall |
| Flexographic ink | Coatings & inks | Never | P3 | Rebottle | Viton | Resin binder plasticises the surface |
| UV-curable coating | Coatings & inks | Never | Refused | Recycle | PTFE | Cures in the bottle; not washable |
| Acrylic adhesive emulsion | Coatings & inks | Never | P3 | Rebottle | EPDM | Caustic at 180°F, often still ghosts |
| PVA wood adhesive | Coatings & inks | Never | P3 | C | EPDM | Wash before it skins over |
| Polyurethane resin, 2-part | Coatings & inks | Never | Refused | Recycle | PTFE | Cross-linked; nothing shifts it |
| Asphalt emulsion | Coatings & inks | Never | P3 | C | Viton | Hot caustic plus long dwell |
| Concrete release agent | Coatings & inks | Never | P2 | C | Viton | Oily film; 140°F detergent |
| Mineral oil, hydraulic | Oils & fuels | Never | P3 | B | Viton | Permeation; faint odour often remains |
| Cutting fluid, soluble | Oils & fuels | Never | P3 | B | Viton | Bacterial odour is the real problem |
| Gear oil | Oils & fuels | Never | P3 | C | Viton | Heavy film; two cycles common |
| Used motor oil | Refused | Never | Refused | Recycle | Viton | Waste stream — not accepted for reuse |
| Diesel fuel | Oils & fuels | Never | Refused | Recycle | Viton | Permanent odour; bottle compromised |
| Kerosene | Oils & fuels | Never | Refused | Recycle | Viton | As diesel |
| Biodiesel B100 | Oils & fuels | Never | P3 | C | Viton | Solvency attacks some HDPE grades |
| Vegetable-based lubricant | Oils & fuels | Never | P2 | B | Viton | Oxidises to a varnish if left |
| Anionic surfactant concentrate | Cleaning & sanitation | Never | P1 | B | EPDM | It is soap — rinses, but foams |
| Non-ionic surfactant | Cleaning & sanitation | Never | P1 | B | EPDM | Easy wash |
| Alkaline degreaser | Cleaning & sanitation | Never | P1 | B | EPDM | Compatible with our own loop |
| Acid descaler | Cleaning & sanitation | Never | P1 | B | PTFE | Segregate heel from caustic tanks |
| Quaternary ammonium sanitiser | Cleaning & sanitation | Case by case | P1 | B | EPDM | Residual actives need verification |
| Peracetic acid sanitiser | Cleaning & sanitation | Case by case | P1 | B | PTFE | Oxidiser; vent and shield |
| Hand sanitiser (ethanol 70%) | Cleaning & sanitation | Case by case | P1 | B | Viton | Alcohol flashes off; little residue |
| Laundry detergent, liquid | Cleaning & sanitation | Never | P1 | B | EPDM | Optical brighteners can tint |
| Car wash soap concentrate | Cleaning & sanitation | Never | P1 | B | EPDM | Very common inbound stock |
| Floor finish / wax emulsion | Cleaning & sanitation | Never | P3 | C | EPDM | Films hard; wash before it dries |
| Potable water | Water & inert | Yes | P1 | A | FDA EPDM | Frequently first-use stock |
| Deionised water | Water & inert | Yes | P1 | A | FDA EPDM | Best-value first-use source |
| Distilled water | Water & inert | Yes | P1 | A | FDA EPDM | As above |
| Glycerine, technical | Water & inert | No | P1 | B | EPDM | Technical grade is not food grade |
| Saline solution, industrial | Water & inert | Never | P1 | B | Viton | Chloride; inspect cage |
| Unknown or mixed residue | Refused | Never | Refused | Refused | — | Safety assessment, not a grading question |
| RCRA P-listed residue | Refused | Never | Refused | Refused | — | Licensed treatment facility only |
| Radiological material | Refused | Never | Refused | Refused | — | No testing, no discussion |
| Pesticide, labelled destruction | Refused | Never | Refused | Refused | — | Service life ended by regulation |
Adapters, bulkheads and spigots
| Part | Group | Options | Materials | Typical use | Availability |
|---|---|---|---|---|---|
| S60x6 to 3/4" GHT | Adapters | Male / female | PP, nylon, brass | Garden hose connection | Stocked |
| S60x6 to 2" NPT | Adapters | Male / female | PP, nylon | Pipe and pump connection | Stocked |
| S60x6 to camlock | Adapters | Type A, F; 2" | PP, aluminium, 316 | Quick-connect transfer | Stocked |
| S56x4 to S60x6 converter | Adapters | — | PP | Older and imported bottles | 1–3 days |
| Camlock coupler | Adapters | Types A–F, DC, DP | PP, aluminium, 316 | Hose and pump halves | Stocked |
| Hose tail / shank | Adapters | 3/4" to 3" | PP, brass, stainless | Hose clamping | Stocked |
| Reducer / increaser | Adapters | 2"×3", 2"×1.5" | PP, aluminium | Matching an existing hose | Stocked |
| 2.5" fire thread adapter | Adapters | NST / NH | Aluminium, brass | Fire-water draft points | 1–3 days |
| Bulkhead fitting | Adapters | 1/2" to 2" | PP, EPDM gaskets | Through-wall on upcycled builds | Stocked |
Covers, jackets and freeze protection
| Part | Group | Options | Materials | Typical use | Availability |
|---|---|---|---|---|---|
| Heater jacket | Temperature | 120 V, 240 V | Insulated silicone element | Winter viscosity, freeze protection | 1–3 days |
| Insulated cover | Temperature | 275 / 330 gal | Reflective PE / PVC | Frost and UV protection | 1–3 days |
| UV / blackout cover | Temperature | 275 / 330 gal | UV-stable PE | Algae control, triples bottle life | Stocked |
| Exposure | Realistic life | Note |
|---|---|---|
| Indoors, dry, no direct sun | 10–15 years | The bottle outlives most process changes |
| Indoors, skylights / direct sun | 8–12 years | Rotate the containers occasionally |
| Outdoors, fully covered | 9–14 years | A cover is the highest-return intervention there is |
| Outdoors, shaded north side | 7–10 years | Orientation matters as much as cover |
| Outdoors, partial sun | 5–7 years | One face chalks before the other |
| Outdoors, full sun | 3–5 years | Chalky, boardy wall; sudden failures |
| Outdoors, full sun + freeze cycles | 2–4 years | The worst combination we see |
Handling and stands
| Part | Group | Options | Materials | Typical use | Availability |
|---|---|---|---|---|---|
| Spill pallet / bund | Handling | 1, 2 or 4 tote | PE | Secondary containment | 1–3 days |
| Tote stand | Handling | Fixed, adjustable | Galvanised steel | Gravity head for decanting | 1–3 days |
| Tote tipper frame | Handling | Manual | Steel | Draining the last heel | To order |
| Transfer pump | Handling | Diaphragm, drum, 12 V | PP / SS wetted parts | Dispensing | 1–3 days |
Formats and footprints for pad design
| Format | Nominal | Usable | L × W × H | Tare (steel base) | Gross, water | Outlet | Stack filled | Availability |
|---|---|---|---|---|---|---|---|---|
| 275 gal standard | 275 gal / 1,041 L | 265 gal | 48 × 40 × 46" | 137 lb | 2,347 lb | 2" S60x6 | 2 high | Ex-stock |
| 275 gal tall | 275 gal / 1,041 L | 264 gal | 48 × 40 × 53" | 141 lb | 2,342 lb | 2" S60x6 | 2 high | Regular |
| 330 gal standard | 330 gal / 1,249 L | 320 gal | 48 × 40 × 53" | 165 lb | 2,834 lb | 2" S60x6 | 2 high | Ex-stock |
| 350 gal | 350 gal / 1,325 L | 338 gal | 48 × 40 × 58" | 172 lb | 2,991 lb | 2" or 3" | 2 high | Occasional |
| 400 gal | 400 gal / 1,514 L | 386 gal | 48 × 46 × 60" | 198 lb | 3,417 lb | 3" buttress | 1 high | Order |
| 550 gal | 550 gal / 2,082 L | 532 gal | 48 × 48 × 72" | 251 lb | 4,688 lb | 3" buttress | 1 high | Occasional |
| 120 gal mini | 120 gal / 454 L | 115 gal | 32 × 32 × 36" | 71 lb | 1,030 lb | 2" S60x6 | 2 high | Occasional |
| 180 gal | 180 gal / 681 L | 174 gal | 40 × 40 × 42" | 98 lb | 1,549 lb | 2" S60x6 | 2 high | Order |
Unit conversions for build planning
| Quantity | From | Equals |
|---|---|---|
| Volume | 1 US gallon | 3.785 litres |
| Volume | 1 litre | 0.2642 US gallons |
| Volume | 275 US gal | 1,041 litres |
| Volume | 330 US gal | 1,249 litres |
| Volume | 1 cubic foot | 7.481 US gallons |
| Volume | 1 US gal | 0.1337 cubic feet |
| Weight | 1 US gal of water | 8.34 lb |
| Weight | 1 litre of water | 1.0 kg |
| Weight | 1 lb | 0.4536 kg |
| Weight | 1 kg | 2.2046 lb |
| Weight | 1 short ton | 2,000 lb / 907 kg |
| Length | 1 inch | 25.4 mm |
| Length | 48" | 1,219 mm |
| Length | 40" | 1,016 mm |
| Pressure | 1 psi | 6.895 kPa |
| Pressure | 1 bar | 14.5 psi |
| Pressure | 1 foot of water head | 0.433 psi |
| Temperature | 140°F | 60°C |
| Temperature | 180°F | 82°C |
| Area | 1 sq ft | 0.0929 m² |
| Rainfall yield | 1" rain on 1,000 sq ft | ≈ 600 usable gallons |
Six rainwater mistakes that end in a ruined tote
Standing it on grass or soil
180 lb per square foot. It sinks unevenly, the cage goes out of square, and the bottle then carries load it was not designed for.
Leaving it full and sealed through a freeze
The most common write-off by a wide margin. Drain it, or two thirds with a vented lid.
No overflow
A full tote in a storm will overflow. At the lid it runs down the side into whatever the tote stands next to.
Leaving it clear
Natural HDPE is translucent. Block the light and you also take the bottle from three-to-five years to ten-to-fifteen.
Self-tapping fittings into the wall
A 60-mil HDPE wall will not hold a threaded fitting reliably. Use a bulkhead with gaskets both sides, or the moulded outlet.
An inputs tote for edible-crop irrigation
A container that held fertiliser or crop protection is permanently unsuitable for anything you will eat.