Choosing the right size mechanical test plug depends on the diameter of the pipe you need to seal or test. Measure the inside diameter of your pipe carefully, then select a plug that matches or slightly exceeds that measurement. Most plugs are labeled with their compatible pipe sizes, so check the product details for guidance. If you're unsure, bring your pipe measurements to the store or consult with a store associate for help. Picking the correct size helps ensure a secure fit and effective sealing during testing or repairs.

Mechanical test plugs are commonly used for sewer pipes, as well as drains and other plumbing systems.

• They're designed to temporarily seal pipe openings for leak testing or maintenance.
• Make sure the plug material is suitable for your application—steel and rubber are popular choices for durability.
• Always follow the manufacturer's instructions for installation and removal to avoid damage or leaks.

Installing a mechanical test plug is straightforward, but it's important to do it safely.

1. First, clean the pipe opening to remove debris.
2. Insert the plug into the pipe, making sure it's centered.
3. Tighten the wing nut or screw mechanism until the plug expands and forms a tight seal.
4. Don't overtighten, as this can damage the plug or pipe.

Most mechanical test plugs are designed to be reusable, especially those made from durable materials like steel and rubber.

• After use, clean the plug thoroughly to remove any residue.
• Inspect for wear or damage before reusing.
• Store in a dry place to prevent rust or deterioration.

If your mechanical test plug leaks, try these steps:

• Check that the plug is the correct size for your pipe.
• Retighten the wing nut or screw to improve the seal, but avoid overtightening.
• Inspect the plug for cracks, worn rubber, or debris that might prevent a tight fit.
• Clean the pipe opening and reinstall the plug.