Norwesco 62397 Manhole Extension 20x15 Inch Ground Tank

Product Description

The NORWESCO 62397 is a manhole extension designed for use with ground-level storage tanks. This component adds vertical height to an existing manhole opening, allowing easier access for inspection, cleaning, and maintenance of underground or ground-mounted liquid storage systems. Constructed from polyethylene, the extension offers corrosion resistance and long service life in demanding outdoor and agricultural environments. At 20 inches in diameter and 15 inches in height, it fits standard ground tank manhole configurations. Installation is typically handled by tank service technicians, irrigation contractors, or agricultural equipment installers.

This manhole extension is used in agricultural, rural water supply, and industrial liquid storage applications where ground tanks require service access. It is suited for installations where a riser section is needed to bring the manhole opening flush with or above grade. The without-lug design affects how the extension seats and secures to the tank opening, so verify the mating tank manhole specification before ordering.

Key Features

• Polyethylene construction resists corrosion, chemicals, and UV degradation
• 20-inch diameter fits standard ground tank manhole openings
• 15-inch height provides a full riser section for above-grade access
• Without-lug design — confirm compatibility with tank manhole before installation
• Lightweight material simplifies handling and field installation

Compatibility

Designed for use with ground tanks requiring a standard 20-inch diameter manhole extension riser section. Verify tank manhole configuration and lug requirements before installation, as this extension does not include lugs.

Installation Notes

Installation should be performed by a qualified technician familiar with liquid storage tank systems. Ensure the tank is drained and depressurized before working at the manhole opening. Verify that the tank manhole flange matches the without-lug configuration of this extension before mounting. Follow all applicable local codes and manufacturer guidelines for sealing and securing the extension to the tank.

Technical Specifications

• Diameter: 20 inches
• Height: 15 inches
• Material: Polyethylene
• Application: Ground Tank

Standard Information

• Brand: NORWESCO
• Manufacturer Part Number: 62397