Clark-Drain is reminding builders and specifiers that Building Regulations Part H state that to reduce the risk of accidents, properties with a drainage inspection chamber of more than 1.2 metres depth must ensure that the opening is reduced to no more than 350mm. To meet this requirement the company has introduced the CLKS 499 reducer which is light and easy to install. Featuring a snap lock system, it is compatible with a number of other manhole covers.