Selkirk 104100 Round Type B Gas Vent Tee, 4", #4RV-TSThe RV line of Selkirk round vent pipe and fittings is designed for use on approved gas appliances in residential and light commercial and industrial applications. Round vents for large appliances will be found in the QC section which follows. Size 4" Part No. 4RV TS Measures: 8 12" x 4 34" x 5" Used to transition system from horizontal to vertical orientation Provides easy access for inspection and maintenance Tee Cap sold separately Made in U. S. A.