Selkirk 187704 Round Type B Gas Vent Wall Thimble, 4", #4RV-WT BF20 1-pole Twin

1-pole Twin

repelling the cold

It secures easily to any exterior wall and can be used for lighting entryways

AN8300 (2-3-1/4

Selkirk 187704 Round Type B Gas Vent Wall Thimble, 4", #4RV-WT BF20 1-pole TwinThe 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 WT Measures: 4 58" x 8 1 4" Used to ensure clearance to combustibles is maintained Wall Thimble also serves as a firestop Adjusts from 4 1 8" to 7" to fit thickness of wall