Venting

4'' Oval 6" Length - 4" Diameter - Ridge Pipe B-Vent Gas Vent Chimney, Duravent.   Oval Gas Vent Instructions Chimney Venting Sizing Handbook

4'' Oval 12" Length - 4" Diameter - Ridge Pipe B-Vent Gas Vent Chimney, Duravent.   Oval Gas Vent Instructions Chimney Venting Sizing Handbook

4'' Oval Adjustable 12" Length - 4" Diameter - Ridge Pipe B-Vent Gas Vent Chimney, Duravent.   Oval Gas Vent Instructions Chimney Venting Sizing Handbook

4'' Oval 6" Length - 4" Diameter - B-Vent Gas Vent Chimney, Duravent. Model OV is an oval Type B Gas Vent that provides the venting capacity equivalent to round Type B Gas Vent. Available in 4"- 6" diameters Aluminum inner liner Galvanized outer wall...

4'' Oval Adjustable 12" Length - 4" Diameter - B-Vent Gas Vent Chimney, Duravent. Model OV is an oval Type B Gas Vent that provides the venting capacity equivalent to round Type B Gas Vent. Available in 4"- 6" diameters Aluminum inner liner Galvanized...

National Chimney’s 2-Ply 3003 aluminum liner can be used to vent Category I gas appliances with A.F.U.E. of 83% or lower. In many cases, especially when only water heaters are vented into masonry flues, the gas appliances are vented into oversized...

4RV-WB is a 4" Diameter, Wall Band for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and galvanized outer wall heats...

4RV-UAM is a 4" Diameter, Universal Adapter for Male for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and galvanized...

4RV-UAF is a 4" Diameter, Universal Adapter for Female for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and...

4RV-TC is a 4" Diameter, Tee Cap for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and galvanized outer wall heats up...

4RV-TF is a 4" Diameter, Tall Cone Flat Roof Flashing for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and...

4RV-TFA is a 4" Diameter, Tall Cone Adjustable Roof Flashing for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and...

4RV-TK is a 4" Diameter, RV Termination Kit for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and galvanized outer...

4RV-3RA is a 4" Diameter, Rheem Adapter for 4" RV Round, Galvanized Selkirk Metalbestos Gas Vent. Model RV features Lock-Tab locking system which provides 360 degree flexibility while maintaining security. Aluminum inner liner and galvanized outer wall...