A blocked bath or shower leaves standing water and can harm the room over time. Hair and soap scum usually combine into a plug in the trap or pipe. Shower trays often clog sooner, since their pipes are narrow. Because a second blockage can hide further along, the pipe beyond the trap needs a check too.
The engineer lifts the drain cover or waste fitting to reach the trap. Hair and debris near the top often come out by hand. Because this is quick, it is usually the first step.
A flexible drain snake runs through the pipe to break up the plug. For a stubborn clog, a rotating head can cut through packed hair and soap. This works well since the snake follows the bends in the pipe.
Water then flushes the pipe clean. Where needed, a micro-jetting nozzle removes the film left on the pipe walls. As a result, water flows freely again.
Fill the bath or run the shower to see how fast it drains. If you still notice gurgling or slow flow, ask the engineer to look again. Then wipe down the area, since some debris may land on the tray.
The cost of bath and shower unblocking depends on the blockage. A shower tray with tight access can take more work, and so can a blockage further down the pipe. Because prices vary, ask for a written quote before work starts. Also ask whether there is a call-out charge.
A hair catcher over the plughole is the simplest fix. It stops hair before it enters the pipe, because hair is the main cause. Clean it after each use, and flush the drain with hot water each week.
Usually, yes, because slow drainage often means a partial blockage in the trap or pipe. However, poor venting can also slow the flow, since air cannot enter behind the water. An engineer can check for both causes.
It can. If the bath shares a waste pipe with the basin or toilet, a blockage in the shared part can slow them all. When several fixtures drain slowly, the blockage is likely in the underground drain. Since the fix differs, tell the engineer which fixtures slow down.