The building industry says it will fight the influx of counterfeit products being sold in New Zealand stores.
Products such as PVC drain pipes have turned up in stores marked with the appraisal stamps of reputable suppliers, when they're actually not fit for use.
Building Industry Federation chief executive Bruce Kohn says they've circulated an alert to members and hope this can be stopped.
He's concerned that with the rising building market, particularly in Christchurch, some less scrupulous overseas suppliers are seeing what they can get away with.
Bruce Kohn says they will go the Government for help if the problem continues to grow.