Prinzing GmbH from Blaubeuren has brought a new production method for manhole bottoms onto the market under the brand name PRIMUS. A preliminary report appeared in BWI 06/07. The completely new method has been further developed up to readiness for production and distinguishes itself by a high degree of automation, so that only very little use of personnel is required for the production of manhole bottoms with variable channels. The monolithic PRIMUS manhole bottoms fulfil the highest demands in relation to dimensional accuracy, function and long service life. The method additionally fulfils the latest requirements in relation to ecological environmental consciousness.