Authorised to work
In New Zealand, most sanitary plumbing, gasfitting or drainlaying is 'restricted'. That means it's illegal to do it yourself because of the health and safety risks. You also risk expensive mistakes and even voiding your insurance.
You need to call on the services of an authorised tradesperson.
When you use a plumbing firm that is a member of Master Plumbers, you know they are authorised to carry out the work they do.
All Master Plumbers members have a Certifying tradesperson on the team. These people have the highest qualification available and are responsible for making sure the company's work is done competently.