Field guide — 6 min read

Winterizing IBC totes

Water expands about 9% when it freezes, and an IBC bottle does not. Every spring we take in totes that spent one bad February learning this.

Sheet: 78
Revision: 2026-10
Scale: 1:1
Drawn at: Peoria IL

You have three choices before the first hard freeze: empty it, heat it, or accept that you are buying a new bottle in March.

Drain below the sump

Water left in the sump and valve body freezes first and splits the most expensive parts. Open the valve, cap off, let it breathe.

Blow the lines

Manifolds and headers hold water in places gravity never reaches. Compressed air beats hope.

Insulate or heat if you need the volume

Closed-cell wraps buy you a few degrees; inline tank heaters and heat-trace with a thermostat buy you the winter.

Drop the stack

Frozen contents plus a double stack is how cages fail. Single-tier anything you cannot drain.

What survives a freeze and what does not

Component	Freeze tolerance	Typical outcome
HDPE bottle	Poor when full	Sump bulge or wall split — rebottle
Steel cage	Good	Fine unless the bottle pushed it out of square
Ball/butterfly valve	Very poor	Cracked body; cheapest part to lose
EPDM gasket	Fair	Compression set, replace in spring
Composite pallet	Good	Watch for ice-jacking under the runners

Already have a cracked bottle?

Do not scrap the whole tote. The cage, pallet and often the valve are fine — that is a rebottle, not a replacement.

See reconditioning →

Checklist

The October walk-round, in order

Step	What to do	What it protects	Time
1	Drain below the sump — valve open, cap off	The valve body, which cracks first	2 min each
2	Blow the lines and manifolds with air	Horizontal runs gravity cannot reach	15 min
3	Open every isolation valve on a bank	Trapped water between containers	5 min
4	Drop filled double stacks to single tier	Cages, if contents freeze and expand	Varies
5	Turn stacks so outlets face away from wind	Two or three degrees of margin	10 min
6	Mark the drain date on the container	Next year's memory	1 min
7	Insulate and heat-trace anything that must stay full	The season's capacity	2 hr per unit
8	Check pallets are not sitting in standing water	Ice-jacking under a runner	5 min

Trigger: Overnight dew point within 4°F of freezing, two nights running
Water expansion on freezing: About 9%
First component lost: The outlet valve body, $14–24
Most expensive outcome: Bulged sump — a rebottle at $74–96
Insulation jacket: Buys a few degrees, not a winter
Heat trace with thermostat: Buys the winter

Air temperature lies to you. A clear, still night radiates heat off a dark container faster than the air cools, and we have pulled ice out of sumps on mornings that never officially dropped below 34°F. The dew point rule is the one that works.

FAQ

Frequently Asked Questions

Why do IBC totes crack in winter?

Water expands about 9 percent when it freezes and an IBC bottle does not. Water trapped in the sump and valve body freezes first and splits the most expensive parts, so the guide says to drain below the sump.

What is the first part to fail in a freeze?

The outlet valve body, which the guide prices at $14 to 24. A bulged sump is the most expensive outcome, a rebottle at $74 to 96. The cage and composite pallet usually survive.

Can I keep a tote full all winter?

Yes, but you need heat. The guide says an insulation jacket buys a few degrees, not a winter, while heat trace with a thermostat buys the winter. Otherwise empty it before the first hard freeze.

When should I start winterizing?

The guide's trigger is an overnight dew point within 4°F of freezing, two nights running. Air temperature alone misleads, since a dark container on a clear still night can ice up while the air stays above 34°F.

Is a cracked-bottle tote scrap?

No. The cage, pallet and often the valve are fine, so the guide calls it a rebottle, not a replacement. See the reconditioning service page, or ask the yard through the contact form.

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