Uniseal U-Stop Bushing for 4" PVC Pipe and 5" Hole

Uniseal U-Stop Bushing – 4" PVC Pipe (5" Hole)

Pipe-stop bushing designed for airtight, depth-controlled PVC penetrations.

The Uniseal U-Stop Bushing is engineered to create a tight, reliable seal while positively stopping 4" Schedule 40 PVC pipe at the base of the bushing. This makes it ideal for sump covers, radon mitigation slab penetrations, and airtight system transitions where consistent pipe depth and sealing integrity matter.

Application

Designed for use where a controlled pipe stop is required, such as radon sump lids and concrete slab penetrations. The U-Stop prevents over-insertion of the pipe while maintaining a secure seal.

Features

• Designed for 4" Schedule 40 PVC pipe only
• Integrated stop sets pipe depth at the base of the bushing
• Provides an airtight, secure seal when properly installed
• Ideal for sump covers and slab penetrations in radon systems
• Simple press-fit installation

Specifications

• Pipe Size: 4" Schedule 40 PVC
• Required Hole Size: 5"
• Function: Sealing bushing with built-in pipe stop
• Material: Flexible elastomer (typical Uniseal construction)

Installation Notes

• Drill a clean, round 5" hole
• Insert the U-Stop bushing flush into the opening
• Insert pipe and press until it contacts the internal stop