This 500 gallon underground septic pump tank is built for below-grade wastewater management applications where reliable holding capacity and access are essential. Molded from polyethylene and rated ANSI/NSF 61 approved, it is suited for septic system installations that require a dedicated pump chamber to move effluent to a drain field or secondary treatment system. The single-compartment, 500 gallon capacity gives installers and property owners a right-sized solution for residential and light commercial septic pump configurations.

At 64'' W x 64'' D x 67'' H, this tank is sized for underground burial and arrives not preplumbed, allowing the installer to fit it to the specific plumbing layout of the site. A single 20'' gasketed manway provides the liquid access point needed for pump installation, inspection, and routine service without requiring excavation of the full tank footprint.

Septic pump tanks are installed downstream of a primary septic tank to collect clarified effluent and house the pump that doses a drain field or advanced treatment unit on a timed or demand basis. This tank fits that role in a single-compartment configuration, keeping the pump chamber separate and accessible. The 20'' gasketed manway opening is sized to accommodate standard submersible effluent pumps and float assemblies, and the underground environment rating confirms the tank is intended for buried installation. Because the tank is not preplumbed, the contractor selects and installs the appropriate inlet, outlet, and pump connections to match the system design. The polyethylene construction resists corrosion from wastewater contact, and the black color is standard for underground tanks of this type.

Key Features:

• 500 Gallon Capacity: Provides ample holding volume for a dedicated septic pump chamber in residential or light commercial underground systems.
• ANSI/NSF 61 Approved: Meets the ANSI/NSF 61 standard, confirming the tank material is evaluated for contact with water and wastewater in applicable system types.
• 20'' Gasketed Manway: Single top-access manway with a gasketed seal gives technicians a secure opening for pump installation, float adjustment, and inspection.
• Polyethylene Construction: Molded polyethylene resists corrosion and chemical degradation from ongoing wastewater exposure underground.
• Underground Environment Rating: Designed and rated for below-grade burial, making it appropriate for standard septic pump chamber installations.
• Not Preplumbed: Arrives without factory-installed plumbing fittings, giving installers the flexibility to configure inlet, outlet, and pump connections to match the specific system design.

This 500 gallon polyethylene septic pump tank is a practical choice for underground pump chamber installations where a single-compartment, ANSI/NSF 61 approved tank with a serviceable manway is required. Confirm site dimensions, burial depth, and local code requirements before ordering, as the tank is not preplumbed and plumbing connections must be field-installed.