Selkirk Single Wall Dripless Smoke Pipe Adapter With Coupler 6 " No.6t-Dsac Type A 6" Part No. 6T-DSAC Measures: 5.940" x 15.75" Dripless Chimney Smoke Pipe Adapter, With Coupler Dripless Smoke Pipe Adapter w/Coupler (DSAC)&ndash;For use in new installations, this part can be installed by twist-locking the coupler on the DSAC into the first section of Sure-Temp&reg;-Type HT chimney pipe.