The Key Certifications Explained
- PGDB Licence: The Plumbers, Gasfitters and Drainlayers Board issues practising licences to qualified plumbers. Every NZ plumber doing sanitary work must hold a current PGDB licence. You can verify a licence at pgdb.co.nz.
- Master Plumbers NZ membership: A voluntary membership requiring members to hold appropriate insurance, provide a 12-month workmanship guarantee, and meet ongoing training requirements.
- Gasfitter's licence: Required for any gas pipe work, including gas hot water installation. A separate PGDB registration category.
- Certifying Plumber: The highest PGDB level — can sign off their own work. Standard registered plumbers must have their work certified by a Certifying Plumber.
How to Verify Your Plumber's Credentials
Before booking: Ask to see their PGDB licence number and check it at pgdb.co.nz. For Master Plumbers, verify membership at masterplumbers.co.nz. Any reputable Christchurch plumber will be happy to provide this information.
Red Flags to Watch For
- Can't provide a PGDB licence number
- Won't provide a Certificate of Compliance after the job
- Significantly cheaper than all other quotes (often indicates unlicensed work)
- No fixed address or ABN/GST registration