Comparison of the efficiency of George fisher and metal pipes in water piping system

Background and Aim: The health concern caused by the respiration of drinking water aerosols containing opportunistic pathogens such as Legionella pneumophila is increasing. This study aimed to investigate the effect of George Fisher's piping system on controlling Legionella pneumophila growth. Methods: A total of 32 samples with a volume of 1 liter per hot and cold water system of the gallery commercial-office complex and selective hospital were collected. Then, filtration, concentration, and heat treatment were performed and cultured on selected BCYE agar medium Results: The culture results showed that 5.8% of George Fisher samples and 37.5% of metal tubes were positive for Legionella pneumophila. Conclusion: Legionella pneumophila stopper pipes and fittings of George Fisher Company have a good ability to control the growth and density of Legionella pneumophila in the indoor water supply system and can be considered a suitable option for use in plumbing and indoor water supply.