fol-da-tank

Fol-Da-Tank Dielectric Testing Tank — Portable Collapsible Frame with 28 Oz Vinyl Liner

Portable Dielectric Testing for Field Crews

Collapsible frame design — Folds flat for transport and storage
28 oz vinyl liner — Chemical-resistant for dielectric testing fluids
Three capacity options — 685, 822, and 987-gallon sizes available
Steel or aluminum frame — Heavy-duty construction for field use
  • FREE Pre-offer Spec Review -- We verify your capacity and frame material before you order
  • FREE Shipping -- LTL delivery to your site — call for job-site options

Price range: $1,779.00 through $1,919.00

30-day money back · No restocking fee

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Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • Framed dielectric testing tank
  • 28 oz vinyl liner
  • Frame components
Fol-Da-Tank Portable Dielectric Testing Tank
Fol-Da-Tank Dielectric Testing Tank — Portable Collapsible Frame with 28 Oz Vinyl Liner
$1,779.00 – $1,919.00Price range: $1,779.00 through $1,919.00

Portable Dielectric Testing for Field Crews

The Fol-Da-Tank framed dielectric testing tank delivers a portable, controlled environment for immersing electrical equipment in insulating oil during high-voltage procedures. Built-to-spec with a heavy-gauge steel or aluminum frame and a 28 oz chemical-resistant vinyl liner, this unit handles demanding field conditions without degrading. Its collapsible frame sets up and breaks down quickly, making it ideal for mobile testing labs and utility maintenance crews. Available in 685, 822, and 987-gallon capacities. Pay as low as $49/month with Affirm. Ships free.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
Chemical Resistant Liner
Foldable Frame Design
High Voltage Testing
Multiple Size Options
685–987 Gal
Capacity Options
28 Oz
Vinyl Liner Weight
$1,779
Starting Price
Spec'd Correctly Before It Ships

Spec'd Correctly Before It Ships

The last thing your testing crew needs is a tank that arrives with the wrong capacity or incompatible liner material. At Tank Vault, we verify your application requirements — voltage class, fluid type, and equipment dimensions — before your order ships. If you need the 987-gallon steel frame for transformer testing but your PO references the 685-gallon aluminum model, we catch it. No guesswork, no return freight, no stalled testing schedule. Every Fol-Da-Tank dielectric testing tank we ship is field-proven and built-to-spec for the job you're running.

Collapsible Frame for Mobile Testing Crews

Collapsible Frame for Mobile Testing Crews

Mobile testing labs and utility maintenance crews don't have room for rigid tanks between job sites. The Fol-Da-Tank foldable frame collapses to a fraction of its assembled footprint, letting you stack it in a truck or store it in a shop corner. Setup and breakdown are fast — unfold the heavy-duty steel or aluminum frame, drop in the 28 oz vinyl liner, and you're ready for dielectric fluid immersion testing. No tools, no extended downtime between locations. The industrial-grade frame holds its shape under load, and the chemical-resistant liner handles repeated fill and drain cycles without degradation.

Three Capacities for Any Test Scenario

Three Capacities for Any Test Scenario

Not every dielectric test calls for the same tank volume. The Fol-Da-Tank line covers 685, 822, and 987-gallon capacities in both steel and aluminum frame options, so you match the tank to the equipment you're testing — not the other way around. Each size uses the same 28 oz vinyl liner material, ensuring chemical compatibility with standard dielectric testing fluids across the entire range. Whether you're testing distribution transformers in a mobile lab or running batch procedures at a utility yard, there's a configured size that fits the workload without wasting fluid or floor space.

Verify Your Setup Requirements

Ensure this dielectric tank aligns with your testing environment and crew capabilities before ordering.

  • Requires a flat, level surface capable of supporting 685 to 987 gallons of dielectric fluid
  • Frame footprint dimensions must fit within your designated mobile lab or truck bed space
  • Compatible with standard dielectric testing fluids and insulating oils

Primary Applications

Designed for electrical maintenance professionals who require reliable fluid testing in the field.

Mobile Testing Labs
Utility Company Testing
Electrical Maintenance

Full specifications

At a glance

Dimensions
See product page
Surface
Aluminum, Steel
Warranty
See product page
Full specifications8 data points across 4 categories

Dimensions

685 Gallon (Steel)5'x5'x44"
685 Gallon Folded (Steel)5'x44"x7"
822 Gallon DimensionsSee product page
987 Gallon DimensionsSee product page

Power & Performance

ApplicationHigh voltage dielectric fluid testing

Materials

Frame MaterialAluminum, Steel
Liner Material28 Oz Vinyl

Compliance & Warranty

WarrantySee product page

The Tank Vault Promise

Every product we carry is vetted for build quality, real-world performance, and documentation support.

Exact Spec MatchThe capacity and frame material you select is exactly what ships to your site—no substitutions.
Ships Free NationwideLTL freight delivery arranged directly to your job site or facility at no additional cost.
30-Day Hassle-Free ReturnsIf it arrives damaged or doesn't meet your spec sheet, we resolve it immediately—no runaround.
★★★★★
“We use the 987-gallon steel frame model for transformer testing across three service regions. Folds down small enough to fit in the test truck alongside our other equipment. Liner has held up through over forty fill cycles this year with no issues.”
F
First L.Knoxville, TN

The Fol-Da-Tank framed dielectric testing tank provides a portable solution for high voltage dielectric fluid testing.

The Dielectric Testing Tank provides a clean, controlled environment for immersing electrical equipment in insulating oil or fluid during testing procedures.

The frame tank design incorporates high quality, chemical resistant materials for long lasting performance.

The collapsible design offers efficient storage and transportation.

Applications:

  • Mobile testing labs, utility company testing, and electrical maintenance crews.

Features:

  • Heavy duty steel or aluminum frame.
  • 28 ounce vinyl liner.
  • Compatible with dielectric testing fluids.
  • Foldable frame allows for quick and easy setup and break down.

Available Sizes / Dimensions / Folded Dimensions / Weight:

Steel

  • 685 Gallon: 5’x5’x44″ / 5’x44″x7″ / 112 pounds steel
  • 822 Gallon: 5’x6’x44″ / 6’x44″x7″ / 125 pounds steel
  • 987 Gallon: 6’x6’x44″ / 6’x44″x7″ / 155 pounds steel

Aluminum

  • 685 Gallon: 5’x5’x44″ / 5’x44″x8″ / 90 pounds steel
  • 822 Gallon: 5’x6’x44″ / 6’x44″x8″ / 100 pounds steel
  • 987 Gallon: 6’x6’x44″ / 6’x44″x8″ / 110 pounds steel

Liner Material:

  • 28 ounce vinyl

Colors

  • Black
  • Red
  • Yellow
  • Orange
  • Blue

Additional Options:

  • Compare other collapsible water tank options and all Fol Da Tank options.

Additional information

Material

Aluminum, Steel
Liner

28 Oz Vinyl
Size

685 Gallon, 822 Gallon, 987 Gallon

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Frequently Asked Questions

The 28 oz vinyl liner is chemical-resistant and designed for use with standard dielectric testing fluids, including insulating oils. If you're working with a specialized fluid blend, contact Tank Vault before ordering with your fluid specifications and we'll confirm liner compatibility. We don't guess on chemical compatibility — we verify it against the liner material data sheet.
Both frames are heavy-duty and designed for repeated setup and breakdown cycles. Steel frames offer higher load tolerance and are suited for stationary or high-frequency testing environments. Aluminum frames reduce overall weight, which matters for mobile testing crews that transport the tank between job sites. Same liner, same capacities — frame material is the only variable.
The foldable frame design allows quick assembly without tools. Unfold the steel or aluminum frame, seat the 28 oz vinyl liner, and the tank is ready for fill. Breakdown follows the same process in reverse. Exact time depends on crew familiarity, but most field teams report under fifteen minutes from folded to fluid-ready.
Yes. Tank Vault works with municipal utilities, electrical cooperatives, and industrial maintenance departments. PO and net-30 terms are available for qualified organizational accounts. Contact us before placing your order and we'll set up your account, verify the correct tank size and frame material for your testing program, and process the PO directly.
The collapsible frame folds flat for efficient storage. Clean and dry the 28 oz vinyl liner before folding to prevent fluid residue degradation. Store in a dry, sheltered area out of direct sunlight when possible. No special climate controls are required, but extended outdoor exposure of the liner will reduce service life.
That's why we offer free pre-offer spec review. Tell us the equipment you're testing, the fluid volume required, and your transport constraints. We'll confirm whether the 685, 822, or 987-gallon capacity is the right fit before you order. If a post-purchase issue arises on an uninstalled tank, our 30-day return policy covers it.
SKU: DET-S-5544-28-V Categories: , Brand:

The Tank Vault Promise

Every product we carry is vetted for build quality, real-world performance, and documentation support.

Exact Spec Match The capacity and frame material you select is exactly what ships to your site—no substitutions.
Ships Free Nationwide LTL freight delivery arranged directly to your job site or facility at no additional cost.
30-Day Hassle-Free Returns If it arrives damaged or doesn't meet your spec sheet, we resolve it immediately—no runaround.

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About fol-da-tank Dielectric Tank

fol-da-tank is a trusted manufacturer of premium dielectric tank. TankVault is an authorized dealer offering the full fol-da-tank lineup with free delivery, price match guarantee, and expert support.

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