450mm Diameter Unsealed Lockable Covers

Compact and Practical Access for Septic and Water Tanks

The Nobis 450mm lightweight access cover and frame is designed for smaller tanks or installations where space is limited. It can be cast into concrete tank lids or screwed or bolted onto plastic, steel, or fibreglass tanks, ensuring a secure and reliable fit.

With a 450mm clear opening, this cover is lightweight at less than 5kg yet strong enough to withstand loads of up to 1.5 tonnes (15kN), making it ideal for light traffic areas. Its compact size minimises accidental entry risks while allowing sufficient access for maintenance.

Manufactured from a high-strength composite of fibreglass and special resin, the cover is moulded under high temperature and pressure, creating a durable and lightweight alternative to traditional covers.