Monitoring Manhole Cover, Round 4" x 8" Bolt-in Lid

The Koby Environmental MH48 is a compact 4" x 8" monitoring manhole cover with a bolt-in lid. Designed for small-diameter monitoring wells where a full-size manhole is unnecessary. The bolt-in lid provides secure, tamper-resistant closure.

Key Features

• 4" nominal size — fits standard 4" monitoring well casings
• 8" overall height — low-profile installation
• Bolt-in lid — secure, tamper-resistant closure
• Durable construction — built for long-term field deployment

Technical Specifications

Applications

Small-diameter monitoring wells, piezometers, soil gas probes, and compact access points where standard-size manholes are too large.

About Koby Environmental

Koby Environmental has designed and manufactured environmental monitoring well hardware in the USA for over 30 years. Their Torquer, FlushLock, and EasyLock product lines are specified by environmental consultants, remediation contractors, and regulatory agencies nationwide.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — we ship within the USA and welcome tax-exempt purchasing for qualified accounts.