Spillover junction fittings can be retro-fitted to existing horizontal runs. 4x4 FiberRunner System Spillouts attach to 4x4 channel and/or fittings to create a 90° vertical drop from a horizontal run. Hinged door included. They accept FTR4X4YL, FIDT4X4BL, S4X4YL6 or E4X4YL6 directly. Spillouts accept optional snap-on cover FRHC4YL6 in conjunction with channel.