Knowledge · G-02
How to clean
an IBC tote.
Short answer
- Triple rinse = 3 × ~28 gallons on a 275, with agitation
- Always strip the valve — residue hides behind the disc
- Never flush residue to a storm drain
- Permeated odour cannot be washed out at any pressure
Rather we did it?
The procedure
Six steps, in this order
The order matters. Washing before you strip the valve is the single most common way to produce a tote that looks clean and is not.
- 01
Identify the prior contents
Before opening anything. Read the label, the plate and any shipping paperwork; ask whoever handled it. If you cannot establish what was in it, stop — an unknown residue can be incompatible with your chemistry, with your drain permit, or with your lungs. An unidentified tote is a recycling candidate, not a cleaning project.
- 02
Drain and manage the heel
Open the valve and drain the residual heel — typically one to three gallons — into a labelled container. Never to a storm drain, never onto the ground, never into a sanitary sewer without checking your permit. Measure what came out; it tells you how thorough the previous user was and what you are dealing with.
- 03
Strip the valve, lid and gaskets
Remove the butterfly valve with a strap wrench, take off the lid, and pull both gaskets. Residue collects behind the valve disc and in the gasket seats, and washing around a fitted valve leaves a ring there that no amount of pressure reaches. Plan to replace both gaskets — they are nine dollars and they are the usual cause of a weep afterwards.
- 04
Wash with matched chemistry
Rotating lance through the 6-inch lid, under 2,500 psi. Hot water at 70 – 82 °C for sugars, syrups, starches, glycols and food residues. A 2 – 4% caustic solution for soaps, surfactants, ag chemicals and alkaline-compatible residues. Solvent work should not be attempted outside a closed-loop system. Work the lance across the bottom radius deliberately — it is where everything settles.
- 05
Triple rinse with verification
Three successive flushes of at least 10% of container volume — about 28 gallons each on a 275 — agitating or lancing each time and draining completely between. Three partial rinses with agitation remove far more than one large static fill. If you have a conductivity meter, check the third rinse against your mains water; that is the cheapest verification available.
- 06
Inspect, dry, and only then close up
Look inside with a torch. You are checking four things: residue rings at the bottom radius, haze or whitening in the wall, stress cracks at the bottom corners, and odour. Then dry it — a closed damp tote grows things. Fit new gaskets, refit the valve hand-tight plus a quarter turn, and water-test before you trust it with product.
Chemistry
Match the wash to the residue
Running the wrong chemistry either fails to clean or converts the residue into something harder to remove. This is the whole reason our yard has three lines rather than one.
| Residue | Use | Conditions | Do not use |
|---|---|---|---|
| Sugars, syrups, molasses | Hot water | 82 °C, lance, 10 min | Caustic — it caramelises residues |
| Starches and gums | Hot water + agitation | 82 °C, extended dwell | Cold water, which gels them |
| Soaps and surfactants | Hot water (rinse-heavy) | 70 °C, 5 rinses not 3 | Extra detergent — it worsens foaming |
| Ag chemicals (non-haz residue) | Caustic | 2 – 4% NaOH, 70 – 80 °C | Acid rinses |
| Glycols and coolants | Hot water | 82 °C | Solvent |
| Latex and water-based paint | Warm water, immediately | Before it cures — after, it is scrap | Any delay |
| Resins, adhesives, coatings | Closed-loop solvent only | Professional handling | Water, caustic, or a DIY attempt |
| Fragrances and essential oils | Nothing works reliably | Assume permeation | Any procedure, honestly |
| Unknown | Nothing | Send it to recycling | Guesswork |
Short answer
- Food grade cannot be restored — permeation is permanent
- Hazmat residue needs a manifest and permitted disposal
- Solvent work needs a closed-loop recovery system
- Unknown residue has no safe procedure
For water storage
Sanitising a food-grade tote for potable use
A food-grade tote is acceptable for drinking water, but it is not sterile on arrival. This is the step people skip.
- Confirm the unit is food grade with a documented history. A chemical tote cannot be sanitised into potable service, and this is not a judgement call.
- Rinse thoroughly with potable water and drain completely.
- Fill about 10% with water and add unscented household chlorine bleach at roughly one cup per 50 gallons of eventual fill volume. Scented bleach contains fragrance compounds that permeate HDPE — you will never get them out.
- Close the lid and roll or rock the tote so the solution contacts every internal surface including the underside of the lid. Leave 30 minutes.
- Drain fully, then rinse twice with potable water until there is no chlorine smell.
- Fit a solid lid rather than vented, and keep the tote shaded. UV through translucent HDPE drives algae growth faster than almost anyone expects.
Repeat annually for stored emergency water, and more often for anything in sunlight. Full build detail for rain capture is on the rainwater harvesting guide.
Kit list
- Pressure washer with a rotating tote lance
- Strap wrench (never pliers on the outlet boss)
- Chemical-resistant gloves, apron, face shield
- Labelled container for the drained heel
- New lid and valve gaskets
- Torch for the interior inspection
- Conductivity meter, if you want rinse verification
Three ways people get hurt
- Opening a valve on a tote assumed empty. Two inches of head is enough to cover you.
- Lancing a caustic wash without a face shield. It comes straight back out of the lid.
- Entering a tote. Never. It is a confined space, and that is a fatality category rather than an injury one.
Questions
Cleaning questions
Can I clean an IBC tote myself?
For water, non-hazardous residues and general industrial duty, yes — and this page is the procedure. What you cannot do at home is restore food grade, remove permeated odour, or legally handle hazmat residue. Those three need documentation and equipment rather than effort.
How do I sanitise a tote for drinking water?
Start with a food-grade tote; a chemical tote cannot be made potable. Then: rinse, fill 10% with water, add unscented household chlorine bleach at about 1 cup per 50 gallons of final volume, agitate so the solution wets every internal surface, leave 30 minutes, drain, and rinse twice with potable water until no chlorine smell remains.
What is a triple rinse?
Three successive flushes with fresh water, each using at least 10% of the container volume — so about 28 gallons per rinse on a 275. Agitate or pressure-lance each time, and drain completely between rinses. Three partial rinses with agitation remove far more residue than one large static fill.
Can I use a pressure washer?
Yes, with a rotating lance through the 6-inch lid. A straight wand only cleans what it points at and will leave a residue ring around the bottom radius, which is exactly where the camera inspection looks. Keep pressure under about 2,500 psi — higher will craze the HDPE.
How do I remove a smell from a tote?
If it is surface residue, the right chemistry removes it. If it is permeation — product absorbed into the HDPE wall — nothing removes it, because there is nothing on the surface left to remove. Test by washing one unit: if the odour returns within a week of drying, it is permeation and the tote should be regraded or rebottled.
Water and waste
How much water a wash uses, and where it goes
The part of the procedure people plan for least. A triple rinse on a 275 is around 85 gallons, and all of it has to go somewhere legal.
| Stage | Water used | What is in it | Disposal route |
|---|---|---|---|
| Heel drain | 0 gal | 1 – 3 gal of product residue | Labelled container; never a drain |
| Primary wash | 25 – 40 gal | Residue plus chemistry | Interceptor or permitted discharge |
| Rinse 1 | ~28 gal | Dilute residue | Interceptor |
| Rinse 2 | ~28 gal | Trace residue | Interceptor or sewer under permit |
| Rinse 3 | ~28 gal | Essentially clean | Usually sewer under permit |
| Total | ~110 – 125 gal | — | — |
Check your own discharge permit before you start. For water and genuinely non-hazardous residues this is usually straightforward; for anything else the effluent is the regulated part of the job, not the container. If that is a problem, toll washing exists precisely because the permit is the hard part.
Safety
The five things that hurt people doing this
Written plainly because every one of these has happened to somebody, and four of the five are entirely preventable with a habit rather than equipment.
| Hazard | How it happens | Prevention |
|---|---|---|
| Residual product release | Opening a valve on a tote assumed empty | Open the lid and look before touching the valve |
| Caustic splash-back | Lancing without a face shield | Face shield, apron, gloves — lance spray returns through the lid |
| Confined space entry | Climbing in to scrub a stubborn residue | Never. This is a fatality category, not an injury one |
| Pressure washer injection | Hand in front of the lance at 2,000+ psi | Treat it as a tool that can inject, because it can |
| Incompatible mixing | Adding chemistry to an unidentified residue | Identify prior contents before any chemistry goes in |
Short answer
- Never enter a tote. There is no version of this that is acceptable.
- Open the lid before the valve, every time
- Face shield for anything other than plain water
- No chemistry until prior contents are identified
From the Yard Journal
Longer pieces from the people who run the wash line, the test bay and the trading desk.
2 September 2022 · 6 min
Why your tote still smells after we washed it
Permeation is not a cleaning failure. It is a material property of HDPE, and understanding it explains most of the grading rules in this industry.
Priya Raghunathan · Head of reconditioning
Read18 December 2025 · 4 min
Our grading floor is deliberately boring
Six labelled bays, one decision per unit, no judgement calls allowed at the end of a shift. Interesting processes produce inconsistent grades.
Priya Raghunathan · Head of reconditioning
Read26 October 2023 · 5 min
Our first failed partner yard audit
We decertified a yard in 2021. They were not cutting corners on purpose — they were running one wash chemistry, and that is enough.
Marcus Vreeland · Founder
Read
Next move
Fifty totes is not an afternoon.
At volume, toll washing on a proper line with matched chemistry and a test record costs less than your own labour and produces documentation you can hand an auditor.