Holding Tanks
These heavy-duty holding tanks are built to extend the capabilities of portable restrooms by providing additional waste storage. Made from impact-resistant polyethylene, they are engineered to withstand years of demanding use. Reinforced corners and internal support pillars add strength, while the smooth design helps prevent cracking and wear from sliding or dragging. All fittings are molded for durability and recessed to reduce the risk of breakage during transport or use. With the ability to connect tanks end-to-end, they offer flexible storage solutions for events, worksites, and long-term applications.
More Information
- Details
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Designed for use with portable toilets and restroom trailers
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Heavy-duty polyethylene construction for maximum durability
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Reinforced corners and support pillars for added strength
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Molded, recessed fittings to prevent damage
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Connectable end-to-end for increased capacity
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Built to resist cracking, dragging, and heavy stacking
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- Specifications
250 Gallon:
- Height: 18” (460 mm)
- Width: 47.5” (1210 mm)
- Length: 72” (1830 mm)
- Color: Natural
- Fresh Water: 250 gal (946.35L)
- Weight: 100 lbs. (45.3 kg)
300 Gallon:
- Height: 16.35” (415.3 mm)
- Width: 60” (1524 mm)
- Length: 95” (2413 mm)
- Color: Dark Gray and Natural
- Fresh Water: 300 gal (1135.62L)
- Weight: 136.3 lbs. (61.8 kg)


