Big Sky Flattanks

Big Sky Flattanks We build custom Flattanks and custom water trailers.

05/23/2026
Fun wedding at big sky Flattank’s!  Congratulations David and Sydney
04/16/2026

Fun wedding at big sky Flattank’s!  Congratulations David and Sydney

04/10/2026

This one is heading for Iowa today.

Finished this one today.
01/21/2026

Finished this one today.

12/23/2025
Need a solid way to outfit a water truck without overspending?Our DIY Flat Tank Kits are built from the same Big Sky Fla...
12/23/2025

Need a solid way to outfit a water truck without overspending?

Our DIY Flat Tank Kits are built from the same Big Sky Flattanks designs we use on our finished tanks — just shipped ready to build. You get everything you need, with toolboxes available and customizable to fit how you actually work.

Same steel. Same specs.
More control over the build and the budget.

If your shop can weld, DIY kits are another solid option alongside our fully assembled tanks.

👉 bigskyflattanks.com

Some trucks we did recently.
09/23/2025

Some trucks we did recently.

Address

7575 Roughsawn Drive
East Helena, MT
59602

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