If you’re simply replacing the visible trim kit on a wall-mounted bathroom mixer tap, such as the handle, cover plate, or finish, it may be possible to do so yourself, provided you’re not disconnecting any plumbing components. However, if the installation requires access to the mixer body inside the wall, adjustment of plumbing connections, or replacement of internal cartridges, the work should be carried out by a licensed plumber.
Wall-mounted mixer taps can be complex, and incorrect installation may result in leaks inside the wall cavity, leading to costly water damage that can go unnoticed for months. For standard basin mixer taps, any work involving the water supply connections or replacement of the tap itself should also be completed by a licensed plumber to ensure a safe, leak-free installation. If you’re unsure whether your project involves more than a cosmetic trim kit replacement, it’s always safest to seek professional advice.