MJ 20” Pressure Manhole Covers up to 18PSI
20” pressure manhole, general purpose access door for non-code applications <= 18PSI for cargo tank / industrial / bulk storage tanks.
-
Knappco Industrial Product Catalog
Features & Benefits
- 6 Quick-opening adjustable cam levers
- Safety catch helps prevent accidents when opening against residual pressure
- Locking tabs enable contents to be secured with tamper proof seal
Part Numbers and Drawings
- MJ1110 20" Pressure Manhole Carbon Steel Cover & Weld Ring, Plated Steel Hardware and Buna Gasket
Features & Benefits
- 6 Quick-opening adjustable cam levers
- Safety catch helps prevent accidents when opening against residual pressure
- Locking tabs enable contents to be secured with tamper proof seal
Part Numbers and Drawings
- MJ1110 20" Pressure Manhole Carbon Steel Cover & Weld Ring, Plated Steel Hardware and Buna Gasket
Need help? Contact support.
Customer Support
Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Technical Support
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
Contact a Distributor
Locate a Nearby Distributor for Replacement Parts
Product Enquiry
Product Information request form to find the right solution
Need help? Contact support.
Customer Support
Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Technical Support
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
OPW CORPORATE HEADQUARTERS
9393 Princeton-Glendale Road
Hamilton, Ohio, USA 45011
Copyright © 2026 OPW, A Dover Company, and its affiliated entities.