The main reason behind calling a professional plumber is their high level of expertise. If novices take up the plumbing job that is outside of their skill set, then they could end up causing more damage to the current situation. This would again lead to a bigger expense. Though, professional plumbers are a bit costly, it is better to spend the money than Do IT Yourself and cause further damage.
If you are so experienced and feel confident, then you can do it yourself. If not, it is better to call a professional plumber. Drain Works, the expert plumbers are the best Sydney plumber EVER! Have any problem with your plumbing work at your home or office? Call Drain Works immediately!