Rinnai 11" To 20" Vent Pipe Extension For Ex17c/Ex22cw

Rinnai 11" To 20" Vent Pipe Extension For Ex17C/Ex22CW Rinnai Gas Direct Vented Space Heaters can use extension venting for up to 13 feet with max 2 elbows (The Bend at the heater does not count towards the max of 2 elbows) Pipe must be accessible and cannot be buried in a wall and must be accessible Rinnai extensions exceeding this length should drain to the outside and sloped 3 Degree downward slope to allow moisture to drain out of the pipe instead into the heater, which would damage the unit 11-20-inch adjustable exhaust pipe For use with Rinnai EX17, EX22C 29.5-Inch air intake hose MFG# FOT-219