(DSAC)-with coupler. For use in new installations, this part can be installed by twist-locking the coupler on the DSAC into the first section of Model SSII type HT chimney pipe. Used to connect either model DS smoke pipe or single wall stove pipe to SSII type HT insulated chimney pipe. The part is designed to slip inside single wall stove pipe to contain any creosote dripping down the chimney on the inside of the pipe system.