These adapters are designed for use with Modine HD and Sterling GG gas heaters and feature built-in mechanical locking bands and silicone gaskets on both sides. Heater adapters are required to secure category 3 venting to a gas unit heater. All pipes and components are engineered with smooth clean welds located 90° from mechanical locking bands. 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 corrosion resistant 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 # VF, ZF, 4650170, 4650175, 4650176, 4651175, 4651176, 4660160, 4660261, ZF4650170, ZF4650175, ZF4650176, ZF4651175, ZF4651176, ZF4660160, ZF4660261