Tank washout requirements
What shippers usually expect from a tank trailer washout, what to bring to the wash, and how to find a facility that handles your load.
Why the requirements matter
Tank trailers often switch between products. A shipper or receiver may reject a load if the tank was not cleaned for the next product, so the washout and its paperwork matter as much as the wash.
Requirements come from shippers, receivers, and regulators, and they differ by product. Confirm the rules for your load with your shipper before you book.
What is commonly requested
A wash ticket or cleaning certificate. Many shippers ask for a document showing the date, facility, tank, prior product, and cleaning method.
Prior-load information. The facility needs to know what was in the tank to choose the cleaning method and handle the residue properly.
Food-grade or kosher handling. Food-grade loads often require a facility that does food-grade washes, and some loads need specific certifications.
Hazardous residue. Facilities that accept hazardous prior loads must be set up for them; not every wash can take them.
Before you go
Call ahead with the prior product, tank type, compartments, and the certificate your shipper needs. Ask about wait times and whether the facility can accept your residue.
Quick answers
Can any truck wash do a tank washout?+
No. Interior tank cleaning needs specialized equipment and residue handling. Look for listings that show tank cleaning or trailer washouts, and call to confirm.
Do I always need a cleaning certificate?+
Not always, but many shippers require one. Ask your shipper what document they need before the wash.
Where can I find washout providers?+
States with enough listings have a trailer washout page, and city pages show which providers list washouts.