Quiet PVC exhaust?
October 9, 2007 3:34 PM Subscribe
How do I eliminate noise from 20ft of 3in PVC exhaust pipe without reducing pipe diameter or airflow?
posted by kuujjuarapik to Home & Garden (8 answers total)
I recently had a new hot water tank installed. It is one of the energy efficient gas types which has an electric exhaust. The plumber had to run about 20ft of PVC to get the exhaust gases outdoors. It's all good, but the problem is that the exhaust makes a low whuuuur noise that is amplified by the time it reaches the outside. I can't change the diameter of the exhaust pipe as this restricts the flow too much and the heater shuts down. What device can I build that will eliminate this noise without restricting the airflow?