DuraVent FasNSeal W2 7" 29-4C Stainless Steel Double Wall Standard Tee sqft1050 The key valve housing is

The key valve housing is easily accessed from the side of the unit

Millivolt ignition in propane gas

Heat up quickly and evenly thanks to its 4777 BTU

and finished in Graphite

DuraVent FasNSeal W2 7" 29-4C Stainless Steel Double Wall Standard Tee sqft1050 The key valve housing isFasNSeal W2 (double wall) vent lengths and components feature patented built in mechanical locking band and triple lipped directional gaskets. All pipes and components are engineered with smooth clean welds located 90 from mechanical locking bands. This construction feature allows for ease of installation. The air space between the inner and outer wall on FasNSeal W2 helps to reduce the clearance to combustibles in addition to creating a heat shield