The Rectangular Doublewall 90 Degree Straight Tap is applicable to 20 gauge or less in thickness and 3” W.G. or less. Most double wall fittings are fabricated with Pittsburgh seams. All our doublewall fittings are completely assembled with all accessories — TDC corners, vane & rail, etc. — pre-installed.
The 90 Degree Straight Tap is constructed with TDC end treatments. There are two different types of applications:
• Acoustical double wall duct for noise control
• Thermal double wall duct for temperature control
