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Description
Black Septic Holding Tanks – 1000L, 1500L, 2500L Heavy-Duty Waste Tanks for Sewage SystemsHeavy Duty Black Water Septic Holding Tanks (600L to 2500L) Ditch the fragile, thin walled wastewater containers that crack under ground pressure. These heavy duty black water septic holding tanks are engineered for serious commercial and agricultural applications, providing rugged, long lasting waste containment for remote job sites, off grid homesteads, and rural RV parks lacking municipal sewage access. Constructed with impact resistant reinforced
Heavy-Duty Black Water Septic Holding Tanks (600L to 2500L)
Ditch the fragile, thin-walled wastewater containers that crack under ground pressure. These heavy-duty black water septic holding tanks are engineered for serious commercial and agricultural applications, providing rugged, long-lasting waste containment for remote job sites, off-grid homesteads, and rural RV parks lacking municipal sewage access. Constructed with impact-resistant reinforced walls ranging up to 7.0 mm (0.28") thick, these tanks safely contain raw sewage, chemical fertilizers, and harvested rainwater without leaking or degrading. Shipped compact for easy freight transport, we stock these commercial-grade septic systems at wholesale prices to ensure you get real value for the dollar on your heavy infrastructure projects.
Key Features:
- Heavy-Duty Reinforced Walls: Built with ultra-thick walls (up to 7.0 mm (0.28")) that easily withstand heavy ground pressure, extreme weather, and chemical exposure without buckling.
- Chemical & Weather Resistant: The industrial-grade black composite safely stores caustic black water sewage, agricultural fertilizers, and rainwater while blocking algae growth.
- Expandable Height System: Optional heightened barrels can be bolted onto the top ports to increase vertical capacity while maintaining the original tank footprint.
- Multiple Capacity Options: Ranging from a compact 600 L (158.5 Gal) system for remote cabins up to a massive 2500 L (660.4 Gal) tank for high-volume commercial waste containment.
Detailed Technical Specifications:
| Capacity Model | Dimensions & Physical Details |
| 600 L (158.5 Gal) Septic Tank | |
| Wall Thickness | 3.0 mm (0.12") |
| 1000 L (264.2 Gal) Septic Tank | |
| Dimensions (L x W x H) | 172.0 cm x 96.0 cm x 92.2 cm (67.7" x 37.8" x 36.3") |
| Wall Thickness | 5.0 mm (0.2") |
| Dry Weight | 48.1 kg (106 lbs) |
| 1500 L (396.3 Gal) Septic Tank | |
| Dimensions (L x W x H) | 200.9 cm x 108.2 cm x 103.6 cm (79.1" x 42.6" x 40.8") |
| Wall Thickness | 7.0 mm (0.28") |
| Dry Weight | 58.1 kg (128 lbs) |
| 2000 L (528.3 Gal) Septic Tank | |
| Wall Thickness | 7.0 mm (0.28") |
| 2500 L (660.4 Gal) Septic Tank | |
| Dimensions (L x W x H) | 275.1 cm x 120.9 cm x 116.6 cm (108.3" x 47.6" x 45.9") |
| Wall Thickness | 7.0 mm (0.28") |
| Dry Weight | 128.8 kg (284 lbs) |
| Heightened Barrel Add-On (General) | |
| Dimensions | 25.4 cm Height x 30.5 cm Diameter (10" H x 12" Dia) |
Available Tank Models & SKUs:
| SKU | Capacity | Wall Thickness |
| ST60L | 600 L (158.5 Gal) | 3.0 mm (0.12") |
| ST100L | 1000 L (264.2 Gal) | 5.0 mm (0.2") |
| ST150L | 1500 L (396.3 Gal) | 7.0 mm (0.28") |
| ST200L | 2000 L (528.3 Gal) | 7.0 mm (0.28") |
| ST250L | 2500 L (660.4 Gal) | 7.0 mm (0.28") |
Available Heightened Barrel Accessories:
| SKU | Item Description |
| 2025316 | 2-Port Heightened Barrel for 600L Tank |
| 2025113 | 2-Port Heightened Barrel for 1000L Tank |
| 2025315 | 3-Port Heightened Barrel for 1500L Tank |
| 2025314 | 3-Port Heightened Barrel for 2500L Tank |
Optional Add-On: Professional Assembly Service
Perfect For:
- Off-grid homesteads, remote cabins, and rural RV parks
- Containing heavy volumes of wastewater at commercial construction sites
- Agricultural storage for liquid fertilizers and rainwater harvesting
- Anyone needing a rugged, high-capacity underground holding tank at budget-friendly prices
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Game changing storage!
Size: 4-tier, Style: wall mount&floor mount
I love the shelves. I got to use my own wood which was a reclaimed piece that I found and sanded and then stained. I'm so proud to see them on the shelves. It got so much clutter corralled from around the room and put in one place where it all looks good displayed together. The support pieces are very good quality and I found this to be very good value for the price. I'm very happy with this item.
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Reviewed in the United States on February 25, 2024
★★★★★ 5
Good all around, some imperfections on threads difficult to screw together
Size: 4-tier, Style: wall mount&floor mount
I received a complete product as advertised, it's a solid steel design with everything you need to mounted included. One small issue I encountered is that the pieces screw together but they wouldn't screw all the way it felt difficult and possibly if forced the steel might crack. Unfairly enough other pieces did completely screw in. So it's probably because of imperfections on the threads.
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Reviewed in the United States on May 9, 2021
★★★★★ 5
Build w/ a Friend, and BYOL (Bring Your Own Level)
Size: 4-tier, Style: wall mount&floor mount
Definitely a two-person job. Not because it's heavy, but a little awkward at first. I installed the first bracket, and my 12 yo assisted. Then, she hung the second bracket, and I assisted. Have a level handy. I didn't want to roll the dice and allow her to hang from the bracket, but it seems super-strong. We hung the brackets 32" apart, and 6" overhang, i.e. 48" x 12" laminate shelves. Gorgeous.
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Reviewed in the United States on March 12, 2025
★★★★★ 5
Nice, sturdy kit...would buy again!
Size: 4-tier, Style: wall mount&floor mount, Size: 4-tier, Style: wall mount&floor mount
Purchasing this kit instead of each piece of pipe and fittings required was a no-brainer. It was especially easy because all pieces are prepainted. It went together with ease.
Mounting was simple with planning, measurements, and a level.
*Note*
I purchase the pine stair treads from Home Depot that are 1" thick and then chemically aged them before adding polycrylic. It is cheaper than plywood and shelving boards, and a full 1" thick rather than 1x12 shelving.
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Reviewed in the United States on February 28, 2021
★★★★★ 5
Looks amazing!
Size: 4-tier, Style: wall mount&floor mount, Size: 4-tier, Style: wall mount&floor mount
Very straight forward to build. Mine was not hard but to a bit more effort because my ceiling is at an angle so I had to get a little creative. I cut a piece of wood and placed it between the ceiling and one of the arms for it to be even. It’s also not completely even cause I didn’t have a long level but still looks amazing.
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Reviewed in the United States on August 12, 2023