I just finished installing a new Oneida Dust Gorilla dust collector that is really overkill for a two car garage shop. The duct work I used was HVAC sheet metal with hand cut 4" Y's off of the main 7" line. The 4" runs are flexible aluminum dryer tubing running to the machines in the shop. When I started the system it has so loud a whistle that I can't stay in the shop with it running. Opening all of the blast gates helps some, but it is still intolerable.
I have duct taped all of the joints. What do you-all suggest as a next step to silencing this monster. Paul Gilbert Dallas, TX