Caged & composite totes
Five parts. Each one fails differently.
01 / ANATOMY
Part by part
What each piece does, and how it gives up
01 — ≈40 lb · HDPE · translucent or black
The bottle
Blow-moulded HDPE, 60 to 80 thousandths of an inch at the thinnest wall. Translucent by default so you can see your fill level, which is a genuinely underrated feature. Fails by stress whitening at the corners, scoring from aggressive agitation, or odour fixation from the wrong cargo.
02 — ≈75 lb · galvanised tube · welded lattice
The cage
Galvanised tubular steel, welded at every intersection. Carries the stack load, not the bottle. Fails by bending, almost never by rusting through. A bent cage is twelve minutes in a press, which is why we rebottle rather than scrap.
03 — 25–45 lb · four-way entry
The pallet
Plastic, steel, composite or wood. Plastic is lightest and washes best; steel takes the most abuse; composite is the compromise most new units ship with; wood is cheapest and the only option that ever needs a heat-treatment stamp for export.
04 — 2 in S60x6 or NPT · butterfly or ball
The outlet
Usually a 2 inch S60x6 buttress thread with a butterfly valve and a dust cap. NPT ball valves are common on older and North American units. The valve and gasket are consumables — we replace them routinely and sell them separately.
05 — 6 in · vented or solid · gasketed
The lid
Six inch fill cap, vented or solid. Vented lets the bottle breathe during temperature swings; solid is required for anything that must stay sealed. Getting this wrong is the most common cause of a bottle deforming in a hot trailer.
Fig. 1 — labelled elevation
Dimensions shown are nominal for a 275 gallon unit on a composite pallet. Full tables live on the dimensions page.
02 / BUYING NOTES
Four minutes of inspection saves a bad load
What to look at before you accept a unit
Look at the bottle
- Corners: white, chalky patches mean stress and a shorter remaining life.
- Interior walls: scoring and crazing hold residue no wash will reach.
- Smell: open the lid. HDPE remembers terpenes and surfactants forever.
- Shape: a bottle that has bulged has been over-pressured or cooked.
Look at the frame
- Cage squareness: sight along the top rail. Bent means re-stack risk.
- Welds: broken intersections are a reject, not a repair.
- Pallet feet: cracked plastic feet fail in a forklift pocket.
- Valve threads: cross-threading is the most common hidden fault.
A / SPECIFICATION
Reference
Dimensions, fittings and seat materials
Fig. 1
Fig. 2| Capacity | Litres | Footprint | Height | Tare | Gross (water) | Stack loaded |
|---|---|---|---|---|---|---|
| 275 gal | 1,041 | 48 × 40 in | 46 in | ≈140 lb | ≈2,435 lb | 2 high |
| 330 gal | 1,249 | 48 × 40 in | 53 in | ≈155 lb | ≈2,905 lb | 2 high |
| 350 gal | 1,325 | 48 × 40 in | 56 in | ≈165 lb | ≈3,075 lb | 2 high |
| 120 gal | 454 | 40 × 32 in | 38 in | ≈95 lb | ≈1,095 lb | 2 high |
| 180 gal | 681 | 42 × 36 in | 42 in | ≈115 lb | ≈1,616 lb | 2 high |
| 550 gal | 2,082 | 60 × 48 in | 60 in | ≈240 lb | ≈4,830 lb | 1 high |
B / FITTINGS
What threads onto it
Fittings, threads and seat materials
| Fitting | Size | Seals by | Seat options | Typical service |
|---|---|---|---|---|
| S60x6 butterfly valve | 2 in | Flat gasket face | EPDM, Viton, PTFE | The standard IBC outlet |
| S70x6 butterfly valve | 2 in | Flat gasket face | EPDM, Viton | European and some 330 gal units |
| 2 in NPT ball valve, poly | 2 in | Thread flanks + tape | EPDM, Viton | Retrofits, metered dispensing |
| 2 in NPT ball valve, stainless | 2 in | Thread flanks + tape | PTFE | Solvents, pressure, hot cargo |
| 3 in butterfly valve | 3 in | Flat gasket face | EPDM, Viton | Viscous cargo, high flow |
| 6 in fill cap | 6 in | Gasketed lid | EPDM, silicone | Vented or solid — choose deliberately |
| Camlock adapter, type C | 1.5 / 2 in | Cam arms + gasket | Buna, Viton | Repeated connect / disconnect |
| Bulkhead tap | 3/4 in | Both-side gaskets | Brass, poly | Rain kits, site water |
| Material | Good with | Avoid with | Temperature | Cost |
|---|---|---|---|---|
| EPDM | Water, acids, caustics, brine, ag-chem | Oils, fuels, aromatics | -40 to 250 °F | Low |
| Viton (FKM) | Solvents, oils, fuels, aromatics | Ketones, amines, hot steam | -15 to 400 °F | High |
| Nitrile (NBR) | Oils, diesel, greases, hydraulics | Ozone, strong oxidisers | -30 to 250 °F | Low |
| PTFE envelope | Almost all chemistry, high purity | Needs very flat flange faces | -100 to 450 °F | High |
| Silicone | Food contact, wide temperature | Solvents, abrasion | -60 to 450 °F | Medium |
C / COMPATIBILITY
Will HDPE hold it?
Sixteen cargo families, rated
| Cargo family | HDPE | Seat | Notes |
|---|---|---|---|
| Water, potable and non-potable | A | EPDM / silicone | Food-history units for potable |
| Acids and caustics, aqueous | A | EPDM / PTFE | Vent fuming cargo |
| Liquid fertiliser, UAN, NPK | A | EPDM | SG up to 1.32 — check your lift-gate |
| Brine and chloride de-icer | A | EPDM | Hard on galvanising, kind to HDPE |
| Food syrups, oils, concentrates | A | Silicone / Viton | Documented food history only |
| Glycols | A | EPDM | Very common; SG 1.04–1.11 |
| Alcohols | A | Viton / PTFE | Flammable — bond and vent |
| Diesel and gas oil | B | Viton / NBR | Permeates slowly over long storage |
| Mineral spirits | B | Viton | Swells HDPE slowly |
| Surfactants and detergents | B | EPDM | Odour fixation risk — dedicate units |
| Latex, adhesives, water-based paint | A | EPDM | Cures if left. Wash promptly. |
| Ketones, aromatics, chlorinated solvents | C | — | Crazes HDPE. Stainless only. |
| Gasoline and low-conductivity fuels | C | — | Static risk. Steel or stainless. |
| Essential oils, flavour concentrates | C | — | Fixes into the wall permanently. Never. |
| Hydrogen peroxide above 10% | C | — | Decomposition and pressure risk |
| Dairy and hot-fill above 140 °F | C | — | Needs CIP and steam. Stainless. |
Permeation
Small non-polar molecules pass slowly through HDPE rather than attacking it. The bottle looks perfect and your cargo quietly leaves. It is a storage-duration problem: diesel for a week is fine, diesel for a year is not.
Crazing
Ketones, aromatics and chlorinated solvents cause fine surface cracking that propagates under stress. It is invisible until you hold the wall against a raking light, and it is a critical grading failure.
Odour fixation
Terpenes and some surfactants dissolve into the polymer itself rather than sitting on the surface. No wash removes them. This is why a food-grade tote has to have been a food tote from new.
E / GRADING
A grade is a promise, not a mood
How every unit is scored
| # | Point | Critical? |
|---|---|---|
| 01 | Prior cargo declaration — present, written, specific | Yes |
| 02 | Residual liquid — any volume at all | Yes |
| 03 | Odour after wash — fixed odour by trained nose | Yes |
| 04 | Bottle corner stress whitening | No |
| 05 | Interior scoring you can feel | No |
| 06 | Interior crazing — fine surface cracking | Yes |
| 07 | Bottle bulge or deformation | Yes |
| 08 | Wall thickness at the thinnest point | Yes |
| 09 | Dome port condition and flange flatness | No |
| 10 | Outlet threads — cross-threading, chipping | Yes if crossed |
| 11 | Valve function, full open and close | No, replaceable |
| 12 | Gasket condition — compression set, bloom | No, replaceable |
| 13 | Cage squareness along the top rail | No, pressable |
| 14 | Cage weld integrity at tube intersections | Yes |
| 15 | Cage coating and galvanising loss | No |
| 16 | Pallet condition — cracked feet, rot, corrosion | No, replaceable |
| 17 | Forklift pocket integrity | No |
| 18 | UN marking legibility and date | No, re-markable |
| 19 | Leak test under our procedure | Yes |
D / ORDERING
Commercial terms, up front
Lead times, minimums and what happens when it goes wrong
| Item | Detail |
|---|---|
| Minimum order | One unit. No account minimum, no membership. |
| Stock lead time | Grade A and B 275 gal usually ship the same week |
| Rebottled lead time | 2–3 weeks, built to order in bay D |
| Food-grade lead time | 1–3 weeks when stock exists; supply-dependent |
| Full truckload | 45 on a 48 ft flat, 48 in a 53 ft van, 90 empties double-stacked |
| Payment, first order | Prepay by ACH or card |
| Payment, established | Net 30 on credit approval |
| Grade guarantee | Regrade or replace, our freight both ways, 14 days |
| Leak warranty | 30 days from delivery, normal atmospheric service |
| Cancellation | Free until the truck is loaded |
| Returns | 14 days on unused stock units, freight at your cost |
| Sales tax | Indiana resale certificates and out-of-state equivalents accepted |
G / PITFALLS
Learned the expensive way
Five mistakes that cost people money
Ordering a 330 without measuring the ceiling
A 275 and a 330 share a footprint; the 330 is seven inches taller. Two 330s stacked is 110 inches against 96 for two 275s, and most sprinkler regimes want eighteen inches of clearance below the deflector. That seven inches is frequently the whole margin.
Forcing an NPT fitting into an S60x6 port
Both are roughly two inches, so it bites and feels tight. It is not sealing, it is chewing the buttress thread. The joint weeps two days later, usually in transit, and cross-threading is one of the few faults that condemns an otherwise perfect bottle.
Reusing a flange gasket
A gasket is a one-use part the moment it has taken a compression set. Reusing one is the cause of most 'the new valve still leaks' emails we get. They cost a couple of dollars. Keep a box at the fill point.
Specifying a solid lid on a tote that sees sun
Sealed container, rising temperature, nowhere for the expansion to go. The bottle bulges between the cage bars and does not fully return. A vented lid is the cheapest risk control in this industry.
Ignoring specific gravity
A full 275 of water is 2,435 lb. The same tote of UAN 32 is 3,168 lb, and a 330 is 3,785 lb. Plenty of lift-gates are rated at 2,500 or 3,000 lb, and the rating assumes a centred load.
F / END OF LIFE
Reuse first, recycle last
What happens when the container is finally finished
| Step | Outcome | Share of mass | Cost to us |
|---|---|---|---|
| 01 | Reuse as is — wash and redeploy | 63.9% | 11 gal of mostly reclaimed water |
| 02 | Repair and reuse — valve, gasket, pallet, cage | 11.4% | Parts and bench time |
| 03 | Rebottle — new bottle, reclaimed steel | 9.6% | A new bottle, two thirds of mass retained |
| 04 | Upcycle — rain kits, grow beds, wash stations | 3.2% | Fabrication time |
| 05 | Material recovery — HDPE regrind, steel, wood | 11.3% | Grinding, washing, drying energy |
| 06 | Residual to licensed disposal | 0.6% | Sludge, gasket rubber, fasteners, laminates |
Spec help is free