Infiltrator Systems’ TW-Series Septic tanks offer a revolutionary improvement in plastic septic tank design, offering exceptional strength in comparison to concrete tanks. These tanks provide superior strength for long-term, water-tight performance. Innovative features not found in any other septic tank include: thick, triple wall design manufactured with proprietary state-of-the-art rotomolding technology; permanent, factory-installed structural bulkheads; and reinforced access ports. No special installation, backfill or water filling procedures are required. All tanks are pre-plumbed and ready for easy installation!

Infiltrator TW-Series Septic Tank
500 Gallon capacity

• Triple wall provides a thick composite wall structure that acts like a structural I-beam.
• Bulkheads offer superior structural stability under heavy loads
• Reinforced access ports do not distort upon backfilling or during pump-outs
• Can be pumped dry during pump-outs (no need to refill with water)
• Resistant to flotation in high water table conditions
• Can be installed with 6 to 48 inches of cover
• Available as single or dual compartment tanks
• Suitable for use as septic and pump tanks
• Flat bottom allow for easy storage and installatio

Infiltrator TW-Series Septic Tank
1050 Gallon capacity

• Triple wall provides a thick composite wall structure that acts like a structural I-beam.
• Bulkheads offer superior structural stability under heavy loads
• Reinforced access ports do not distort upon backfilling or during pump-outs
• Can be pumped dry during pump-outs (no need to refill with water)
• Resistant to flotation in high water table conditions
• Can be installed with 6 to 48 inches of cover
• Available as single or dual compartment tanks
• Suitable for use as septic and pump tanks
• Flat bottom allow for easy storage and installatio

Infiltrator TW-Series Septic Tank
1500 Gallon capacity

• Triple wall provides a thick composite wall structure that acts like a structural I-beam.
• Bulkheads offer superior structural stability under heavy loads
• Reinforced access ports do not distort upon backfilling or during pump-outs
• Can be pumped dry during pump-outs (no need to refill with water)
• Resistant to flotation in high water table conditions
• Can be installed with 6 to 48 inches of cover
• Available as single or dual compartment tanks
• Suitable for use as septic and pump tanks
• Flat bottom allow for easy storage and installatio