Home > HDPE Pipe – Dissimilar Connection – HDPE to RCP Concrete Encased with Adapter-D-1-123 HDPE Pipe – Dissimilar Connection – HDPE to RCP Concrete Encased with Adapter-D-1-123 June 17, 2014 1-123 HDPE to RCP Connection-Concrete Encased Detail Categories: Stormwater Core Products Fittings & Accessories Applications Projects Support