
Cherne‘s Gripper plugs can be used in a variety of applications including DWV (drain, waste and vent) testing and stack testing. End-of-Pipe design won’t fall in, whereas the Inside-of-Pipe design allows you to locate the plug inside the pipe as far as you need. Time tested, the Gripper® remains one of the most popular mechanical plugs on the market.
Original Gripper® Plug Features:
- Ideal for sewer testing and long-term applications
- Made with glass-reinforced ABS plastic
- End-of-pipe design seals only at the end of a pipe
- Inside-of-pipe design seals inside pipe as far as needed
Equipped with:
- Easy to install extra large zinc wing nut – won’t rust
- Natural rubber o-ring
- Galvanized carriage bolt to prevent corrosion


Hub-Fit Gripper® Plug Features:
- Ideal for use in hub fittings and in bell-end pipe
- Pressure rated for conducting DWV tests
- Made with glass-reinforced ABS plastic
- Yellow color for greater visibility in pipe
- Natural rubber o-ring for positive seal
- Galvanized carriage bolt to prevent corrosion
- Easy-to-install, extra large zinc wing nut – won’t rust

Clean-Out Gripper® Plug Features:
- Guaranteed to seal any damaged threads
- Made with glass-reinforced ABS plastic
- Black color blends well with cast-iron pipe
- Stainless steel hardware
- NPT sizes, including hard to find 3½”
- Natural rubber threaded o-ring for positive seal
Cherne Mechanical Plugs (Download here)
Cherne Product Catalog (Download here)