Oatey 12678 Tub Waste Overflow Test Plug Trending

The OATEY 12678 is a tub waste overflow test plug designed to temporarily seal the overflow opening on a bathtub drain assembly during rough-in pressure testing. Plumbers use this plug to isolate the drain system and verify a watertight seal before walls or surrounds are closed in. The plug inserts into the overflow port and holds pressure while the drain line is tested per code requirements. It is a standard tool in residential and light commercial rough plumbing inspection work.

This test plug is used during the drain, waste, and vent rough-in stage of residential bathroom installations. It is suited for standard bathtub overflow fittings and is typically used alongside other test plugs to complete a full system pressure test. Plumbers working on new construction or remodel projects will find this plug fits into the overflow test procedure before the final plumbing inspection.

Key Features

• Designed to seal the tub overflow opening during rough-in pressure testing
• Allows isolated pressure testing of the drain and waste system
• Supports code-required leak and pressure checks before wall closure
• Reusable design suitable for multiple test applications

Compatibility

Designed as an OEM-style replacement and standard-use test plug for residential bathtub waste overflow fittings during drain system pressure testing.

Installation Notes

Installation is performed by a licensed plumber during the rough-in phase prior to final inspection. Insert the plug securely into the overflow port before applying any test pressure to the drain system. Follow local plumbing code requirements, including IPC guidelines, for test duration and pressure levels. Remove the plug only after the system has been depressurized and the inspection is complete.

Technical Specifications

• Application: Tub waste overflow pressure testing

Standard Information

• Brand: OATEY
• Manufacturer Part Number: 12678