DuraVent FasNSeal W2 6" 23 Degree 316L Stainless Steel Double Wall Bird Screen d34 If that does not resolve

If that does not resolve the issue

25 Orifice - Front #43 Orifice - Rear 3

Cold climate mode

It is a standard gas connection and gas shut-off valves are available with the male connection

DuraVent FasNSeal W2 6" 23 Degree 316L Stainless Steel Double Wall Bird Screen d34 If that does not resolveFasNSeal 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