DS EN877 MLK Cast iron pipe and fittings Dinsen supplies a comprehensive range of EN877 SML /MLK/MLB/ drainage cast iron pipe and fittings from DN 40 up to DN 300. Apart from the simple EN877 cast iron fittings such as bends, branches and reductions. Dinsen also supplies special fittings such as single branch, short pipe with door. EN877 SML cast iron pipes are suitable for installation inside or outside buildings. When grey iron pipes was been installed outside the buildings, it will not get rust with the protection of the coating.