Oatey 274518 Cherne MS2 Long Test-ball Plug Waste Stack Sewer Air Test Blocking Plug

Product Description

The Oatey 274518 is the Cherne MS2 Long Test-Ball Plug, a heavy-duty inflatable blocking plug built for waste stack testing and sewer air testing in residential and commercial plumbing systems. Plumbers and drain technicians rely on this plug to isolate sections of pipe, seal wye fittings, and conduct pressurized air tests that verify the integrity of drain, waste, and vent systems before final inspection. The plug is engineered to work across multiple pipe diameters, giving technicians flexibility on the job without needing a separate plug for every line size. Molded-in sealing ribs run along the exterior of the plug body, creating a firm, leak-free contact with the interior pipe wall once the plug is inflated. This design eliminates the guesswork of a loose fit and reduces the risk of a blow-out during a pressurized test. The inflation system uses a standard tank valve thread, so it connects easily to common air supply equipment already found in a plumber's truck. The plug is rated for a maximum back pressure of 13 psi, which equals roughly 30 feet of water column. That pressure rating meets the requirements for standard sewer air tests and DWV system inspections called out in most residential and commercial plumbing codes. The black rubber construction resists abrasion and holds up to repeated use in rough pipe conditions. The strap and handle attachment makes positioning, retrieval, and storage straightforward in tight stack access points. This blocking plug is a dependable tool for new construction rough-in, remodel work, and service calls that require a confirmed pressure-tight seal before connecting fixtures or closing walls.

• Inflatable blocking plug rated for up to 13 psi back pressure, equivalent to 30 feet of water column, meeting standard DWV air test requirements
• Molded-in sealing ribs create a leak-free contact with the pipe wall across multiple pipe diameters for versatile field use
• Tank valve inflation thread connects to standard air supply equipment, and strap and handle attachment simplifies plug positioning and retrieval

Product Highlights

The Oatey 274518 Cherne MS2 Long Test-Ball Plug delivers a reliable, pressure-tested seal for waste stack and sewer air testing applications, with a multi-diameter fit and durable rubber construction that holds up to repeated use in demanding field conditions.

Product Information

Standard Information

• Brand: OATEY
• Manufacturer Part Number: 274518

Technical Specifications

• Product Type: MS2 Long Test-Ball
• Plug Type: Blocking
• Color: Black
• Inflation Thread: Tank Valve
• Maximum Back Pressure: 13 psi (0.9 bar) / 30 ft. (9.1 m)
• Chain Eye Bolts: Strap and Handle