Selkirk® by Duravent - Round Female Vent Adapter/Connector, 4 in Dia

Selkirk® by Duravent - Round Female Vent Adapter/Connector, 3 in Dia

Selkirk® by Duravent - Round Vent Cap/Termination, 3 in Dia

Selkirk® by Duravent - Round Vent Cap/Termination, 4 in Dia

Selkirk® by Duravent - Round Vent Cap/Termination, 5 in Dia

Approved Vendors - Dielectric Nipple, 2 in, Groove

Approved Vendors - Dielectric Nipple, 2-1/2 in, Groove

Approved Vendors - Dielectric Nipple, 3 in, Groove

Approved Vendors - Dielectric Nipple, 4 in, Groove

Selkirk® by Duravent - Round Male Vent Adapter/Connector, 4 in Dia