Home page Button Prefab Prefabricated drains CAD consultant Loose parts References News News BUTTON STORES dBlue and FRIAPHON. KNAPPENS continues its successful investment in being a leader in customized sewage solutions. Together with GLYNWED AB, we have agreed to stock up on the 2 sound-absorbing ... Read the whole news >> New website Today, Tuesday, September 11, 2012, we release our new website. Through our collaboration with the advertising agency ohappa, we have made an effort with all our marketing material and worked out an updated ... Read the whole news >> 1 Norrkämstaleden 20 827 31 LJUSDAL Tel: 0651 - 162 50 info@knappens.se Knappens Prefab develops and manufactures products for the plumbing industry and other industries. Since the company was founded in 1967, Knappens Prefab has developed into a market leader in prefabricated sewage frogs. The company is known for its high quality and is used in both new buildings and ROT projects. The company has a self-developed machine park and works in a 3D-CAD application that provides the opportunity to prefabricate sewer frogs with very high precision. Construction drawings / CAD drawings are converted into production drawings and sewer frogs, quality checked, produced and delivered. Knappens Prefab AB has been owned 50% by LV Invest in Ljusdal and 50% by Jörgen Hylander since January 2007. The company is located in Ljusdal and has Sweden as its main market. Home page Button Prefab Prefabricated drains CAD consultant Loose parts References News MADE BY ohappa