Selkirk 187704 Round Type B Gas Vent Wall Thimble, 4", #4RV-WT BF20 or #1889 universal outlet for

or #1889 universal outlet for each opening

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

1-pole Twin

652054 & 545886

The paper contains 60% recycled fiber with a minimum of 40% post-consumer waste content to meet EPA guidelines for post-consumer waste in paper towel products

Selkirk 187704 Round Type B Gas Vent Wall Thimble, 4", #4RV-WT BF20 or #1889 universal outlet forThe 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