Tech arrived to a tub spout that had fallen out in the common bathroom due to the fact that it was improperly installed. New tub spout was installed and tested and is working properly at this time. Tenant describe to tech that the sink was draining slowly and he thought it was from A slow drain. Tech explained that due to a cheap quality pop up, most likely supplied with the faucet, that it was not allowing water to properly drain from the sink. Tech replaced the plastic pop up with a new Wolverine brass chrome pop up. Upon installation of the pop-up tell piece underneath the lab sink broke loose. Tech pulled tailpiece Cleaning both the male and female side of the pipe and re-glued drain together.