400-Gal. Flexible Secondary Containment Tank NO Drain
★★★★★ 5.0 out of 4 reviews · Google Reviews- 18 oz. PVC fabric — excellent chemical compatibility, folds flat for storage
- 400-gallon capacity — meets EPA 40 CFR 264.175 & SPCC requirements
- Aluminum L-brackets — removable for compact folding, quick 15-minute setup
- Made in USA — mfr.,FREE Shipping
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Product Overview
Technical Specifications
Flexible Containment Sump — 18 oz. PVC Fabric
| SKU | A2850U |
|---|---|
| Capacity | 400 Gallons |
| Outside Dimensions | 102" L x 48" W x 24" H |
| Material | Copolymer 2000 |
| Drain | No Drain |
| Color | Black |
| Weight | 45 lbs |
| Setup | L-Bracket Easy Set-up |
| Shipping | Ships UPS |
| Manufacturer | UltraTech |
Expert Insights
Frequently Asked Questions
400-Gal. Flexible Secondary Containment Tank NO Drain
What is the difference between the drain and no-drain versions?
The no-drain version (A2850U) requires collected liquids to be pumped out manually. The drain version (A2851U) includes a built-in drain fitting for gravity discharge. Many SPCC plans require the no-drain version to prevent accidental release of contaminated stormwater.
How do I set up this flexible containment tank?
The tank uses L-bracket corners that fold flat for transport and pop up for quick assembly. No tools are required. One person can set it up in minutes. Simply unfold, insert the L-brackets at each corner, and the tank is ready for use.
Will this tank hold a 275-gallon IBC tote?
Yes. At 400 gallons, this tank provides more than 110% containment capacity for a single 275-gallon IBC tote, meeting EPA SPCC secondary containment requirements. The 102" x 48" footprint accommodates standard IBC dimensions.
What chemicals is the Copolymer 2000 material compatible with?
Copolymer 2000 is resistant to most petroleum products, oils, coolants, and many common industrial chemicals. For specific chemical compatibility questions, contact AbsorbentsOnline technical support with your exact chemical list.
Can this tank be used outdoors year-round?
Yes, the Copolymer 2000 material is UV-resistant and designed for outdoor use. For extended outdoor deployment, consider a cover to prevent rainwater accumulation, which would reduce effective containment capacity.
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Cross-Reference Guide
This product is compatible with applications that use the following part numbers:
- introCompatible part numbers for 400-gallon flexible secondary containment:
- partsA2850UUltraTech 2850A2851U (with drain version)
- noteUltraTech 400-Gallon Flexible Containment Sump, no drain. AbsorbentsOnline SKU: A2850U. Also available with drain as A2851U.

