Horobin 4″ (100mm) Steel Drain Test Plug | 94mm – 112mm Expansion Range

Horobin 4″ (100mm) Steel Drain Test Plug | 94mm – 112mm Expansion Range

• Genuine Horobin 100mm (4″) steel test bung
• Expanding range fits internal pipe diameters from 94mm to 112mm
• Industry standard for air and water pressure testing
• Heavy-duty steel plates with a thick, high-grip rubber seal
• Ergonomic butterfly screw for a secure and powerful seal
• Comes with standard 1/2″ BSP thread capped with washer
• Connection thread if needed is 1/2″ BSP (measures 21mm)

Details

This Horobin 4″ steel test plug is a rugged tool for professional drainage inspections. Specifically, it is the standard size for most domestic and commercial sewer pipes. The plug expands to fit internal diameters from 94mm to 112mm. It features a robust metal construction that prevents buckling under pressure. By tightening the butterfly nut, the rubber ring creates a permanent airtight barrier. Consequently, it is the perfect choice for testing or temporarily blocking 4-inch lines. In short, this metal bung offers the durability needed for repeated site use.

Sealing a large 4-inch pipe requires a fitting that can handle significant back-pressure. Furthermore, lightweight plastic bungs can often pop out during a water head test. This leads to dangerous spills and failed building inspections. Specifically, older 100mm pipes often have irregular internal surfaces that are hard to seal. However, the Horobin 4″ Metal Test Plug solves these structural challenges. It provides a wide expansion range to bridge any gaps in the pipe wall. Because the plates are made of steel, they stay perfectly flat during tightening. Therefore, you can trust your pressure readings and avoid the cost of re-testing.

Brand:

• Horobin

MPN:

• 73062