Frequently Asked Questions

• What duct sizes are available for these metal 90-degree adjustable elbows?

  They are offered in common round diameters to match standard duct runs. Select the elbow size that matches your duct; use reducers if needed.

• Are these elbows compatible with standard round sheet metal ducting?

  Yes. They’re designed for standard round metal duct systems with conventional male/female (crimped) ends for a secure fit.

• How do I measure and install a 90-degree adjustable elbow for a tight space?

  Measure the available clearance and centerline path. Set the elbow angle, dry-fit, then secure with screws and seal the joints to prevent leaks.

• Do these elbows require sheet metal screws or sealant for proper installation?

  Use at least three sheet metal screws per joint and seal with duct mastic or UL 181 foil tape for airtight connections.

• Are these elbows suitable for both supply and return air runs?

  Yes. They’re commonly used on both supply and return ducts when correctly sized, supported, and sealed.

• What gauge of metal are these elbows made from?

  They’re constructed of galvanized steel in contractor-grade gauges. Exact gauge can vary by size; check the product details for specifics.

• Can these elbows be used in light commercial duct systems?

  Yes. They are appropriate for residential and light commercial applications; verify local codes and sizing for your project.

• Are these elbows compatible with flexible duct or only rigid metal duct?

  They’re primarily for rigid round metal duct. To attach flex, use a starting collar or coupling and secure with clamps and approved tape.

• What is the adjustable range-can I set less than 90 degrees?

  Yes. The sections articulate so you can set the elbow anywhere from a shallow bend up to 90 degrees.

• Which end should be crimped for correct airflow direction?

  Install with the crimped (male) end pointing in the direction of airflow to help prevent air leaks at the joint.