Part H of the Building Regulations (2010) clearly states that any new manhole, with a depth measuring greater than 1.2m from the cover to the invert of the chamber, shall have access restricted to 350mm.
We now offer 350mm reducer rings for 450mm openings. Furthermore, Version 2.1 of The Code (May 2021) also continues to require that manhole tops mounted on chambers more than 1m deep, to pipe soffit of the chamber, restrict the frame opening access.
Wrekin’s new chamber reducer ring accessory provides the restricted access needed for adoptable inspection chambers. It is designed to fit a wide range of our Highway and Tristar access covers, the ring is straight forward to install and features a non-return catch that locks them in place for peace of mind. What’s more, they can be factory fitted to avoid confusion on site.
For sites that have neglected to specify a restriction device, it is not too late to rectify, thanks to our solution you can retrofit reducer rings to standard Wrekin manhole cover frames, allowing customers to be confident that they can make their scheme compliant in future if they happen to overlook installation of these safety accessories when the cover is first put in place.
