How to Change a Sink Trap Without Causing Leaks

Replacing a sink trap is often a simple DIY job, but small mistakes with seals and compression washers can quickly lead to leaks. This guide explains how to change a sink trap correctly, avoid common fitting errors, and understand when a minor plumbing issue could point to a larger drainage problem. Learn the proper installation process, common pitfalls, and what a reasonable sink trap replacement should cost in the UK.