How to install a flue pipe for a wood-burning stove

Written by dakota wright
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How to install a flue pipe for a wood-burning stove
The flue pipe connects to the top of the stove. (Jupiterimages/Photos.com/Getty Images)

A flue pipe for a wood-burning stove is separated into several sections, each section performing a specific task. When installed correctly, a flue pipe will not have more than 3 m (10 feet) of straight-run pipe and more than two 90-degree elbows, and will connect to a double- or triple-wall chimney pipe exiting the roof. The installation process is not difficult.

Skill level:
Easy

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Things you need

  • Measuring tape
  • Flue elbows
  • Pipe couplers
  • Screw gun
  • 1.3 cm (1/2 inch) screws
  • Tin snips

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Instructions

  1. 1

    Measure the distance from the wood-burning stove flue collar to the collar on the insulated chimney, using a measuring tape. When a flue pipe travels farther than 3 m (10 feet) to reach the insulated chimney, break the amount of pipe into sections. You would need two 1.5 m (5 foot) sections of flue pipe to travel a 3 m (10 foot) distance.

  2. 2

    Place the wood-burning stove so that all pipe and the stove itself will clear all combustible obstacles by 45 cm (18 inches). Obstacles that could catch fire include furniture, draperies, walls, doors, and shelves. Decrease the amount of clearance by using double-walled insulated pipe near combustible objects.

  3. 3

    Install any 90-degree bends in the wood-burning stove first. A better choice for making bends is the installation of two 45-degree elbows. Fit the male end of one 45-degree elbow into the flue collar. Twist the pipe so that the exhaust end is facing up. Guide the second 45-degree elbow into the first, overlapping the joints 3 cm (1 1/4 inch).

  4. 4

    Attach the first pipe to the appliance flue collar, using a screw gun and 1.3 cm (1/2 inch) self-tapping screws. Use screws to assemble each pipe at the joints, screwing in a minimum of three screws.

  5. 5

    Guide the male crinkled end of the first straight-run flue pipe into the appliance flue collar or pipe elbow.

  6. 6

    Insert the remaining pieces of pipe to reach the height of the double- or triple-walled pipe passing to the outdoors. Flue pipe should be installed straight to decrease the risk of off-gassing and joint leakage.

  7. 7

    Cut the flue pipe needed to complete the assembly with tin snips. Fit flue pipe couplers into the preceding pipe and the flue pipe that was modified. Fasten the flue pipe securely to the insulated chimney with the screw gun and three self-tapping screws.

Tips and warnings

  • Use 24 gauge flue pipe for pipe bigger than 15 cm (6 inches) in diameter.
  • A flue pipe should never run through combustible material. When runs through a floor, ceiling, or wall are necessary, install an approved Stainless Steel Class A Insulated Chimney. All chimneys must have a finished height of 90 cm (3 feet) above the roof peak.
  • Do not run flue pipe through a cupboard or window.

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