Used for standard and high-wind through-the-wall terminations. Comes with built-in screens to keep birds out. All pipe and fittings are UL1738 approved for category II, III and IV venting applications.
What is UL 1738? In short, it is a US standard for gas venting systems required in category 3 applications. Category 3 refers to positive vent pressure which is created by exhaust blowers in unit heaters. These vent systems must be constructed of 316L stainless steel, contain gaskets for sealing, and have a built in mechanical locking band among other requirements. All category 3 vent pipe and fittings offered are single wall.
Features
- Made of 316L corrosion resistant stainless steel
- Built-in high temp silcone gaskets for air tight seal
- Built-in locking band to insure a secure fit (no hardware needed)
- UL1738 approved for category 3 venting applications
- Limited lifetime warranty
Item # VM 4660155, 4660255, 4651365, VM4660155, VM4660255, VM4651365