how do you level a floor with a drain in it?
Installing the Finish Lineâ¢ Adjustable Drainage System. Step 1: Set The Drain. Set the Finish Lineâ¢ so the top is flush to the concrete pour level. The height is adjusted by threading the coring sleeve up or down. The concrete is poured level with the top of the Finish Lineâ¢. The concrete contractor can easily power-trowel the slab and eliminate the need to hand finish around drains and cleanouts.