Hart & Cooley Pellet Vent Elbow 90 DegVenting solutions for your pellet stove. Selkirk gives you the safe, efficient, and cost effective venting system that's engineered precisely for pellet and corn burning stoves. Model VP Pellet Pipe has been tested and listed by Underwriters' Laboratories, Inc., in accordance with UL 641 Standard for Low Temperature Venting Systems. 90 degree. UL listed for type L, low temperature venting systems, AmeriVent Pellet Vent features sturdy, double wall