Installing stove pipe fittings, such as reducers, increasers and elbows, requires only basic skills and common tools. Stove pipe reducers simply slip over the crimped ends of stove pipes and join the components' ends with a set of self-tapping sheet metal screws. Importantly, stove pipe manufacturers offer both smooth reducers and pre-crimped types. The cost difference between smooth and crimped pipes is negligible, and using crimped pipes greatly reduces installation time and effort.
- Skill level:
- Moderately Easy
Things you need
- Large-diameter stove pipe
- Crimped stove pipe reducer
- Power drill
- Nut driver
- Self-tapping sheet metal screws
- Small-diameter stove pipe
Slip the smooth, large side of a stove pipe reducer fitting over the crimped end of a large-diameter stove pipe. Slide the reducer onto the pipe until the reducer completely covers the crimps around the pipe's circumference.
Attach a nut driver to a power drill; nut drivers are drill-mounted sockets that fit precisely around the head of hexagonal, self-tapping sheet metal screws. Mount a self-tapping sheet metal screw into the nut driver.
Press the screw's tip against the reducer at the joint between the reducer and stove pipe. While firmly pressing the screw tip against the reducer, activate the drill to drive the screw through both the reducer and stove pipe. Maintain firm forward pressure, while driving the screw, to ensure that the screw's self-tapping tip bores through the metal.
Drive a total of three screws through the joint between the reducer and the stove pipe. Space the screws equidistant around the circumference of the joint.
Slip the small-diameter stove pipe over the open, crimped end of the reducer. Slide the pipe onto the reducer until the pipe completely covers the crimped portion of the reducer.
Mount another screw into the nut driver. Firmly press the screw's tip against the joint between the pipe and reducer and drive the screw through both. Drive two more screws into the joint; space the screws equidistant around the pipe's circumference.
Tips and warnings
- Use a magnetic nut driver to prevent the screw from wobbling during driving; a magnet at the base of a magnetic nut driver's interior holds screws straight.
- Check building codes for minimum stove pipe diameters and clearances; municipalities restrict installing pipes near combustible materials and often prohibit reduction in pipe size.
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