Use with any InnoFlue® siphon. Placed at the end of the last Branch Tee in a cascade configuration, the Horizontal Drain Fitting removes condensate from the system and allows for inspections and system clean out 32 mm OD drain. Centrotherm Eco Systems InnoFlue® Drain Fitting, Horizontal, For Use With: InnoFlue® Siphon and InnoFlue® Polypropylene Vent Systems, 8 in Dia Nominal, Polypropylene, Gray, 8.8 in OD x 12.7 in L, Domestic