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Zinc-plated steel test-ball plug with ring and chain, deflated 2.64 by 5.18 inches

Cherne

Cherne 276348 Multi-Size Test-Ball Plug 3–4 in

SKU CH-985Y-MWEG0 MPN 276348

Zinc-plated steel plug tests 3 to 4 inch pipes with a 2.64 inch deflated diameter and 5.18 inch length

  • Product typeDrain Components
  • Fits 3 to 4 inch pipes with a 2.8 to 4.25 inch inside diameter range
  • Deflates to 2.64 inch diameter for easy insertion through tight openings
  • 18 inch deflated length provides reliable sealing surface contact
  • Zinc-plated steel construction resists corrosion in drain environments
  • Tank-valve air connection with tethered ring and chain prevents loss during use

Pipe Diameter Range

The Cherne 276348 is a multi-size test-ball plug designed for 3 to 4 inch pipes. It covers a minimum inside diameter of 2.8 inches and a maximum of 4.25 inches. The deflated body measures 2.64 inches in diameter and 5.18 inches long for insertion.

Application Fit

Suits pressure testing and temporary blocking in residential or light commercial drain lines within the stated diameter window. Not suitable for pipes smaller than 3 inches or larger than 4 inches nominal size. Installers needing a bypass port or a different connection style should look at other models.

Deflated Diameter

The 2.64 inch deflated diameter determines whether the plug can enter the pipe through cleanouts or tight bends. Verify this clearance against your specific access point before purchase. The zinc-plated steel construction resists corrosion during repeated use.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 58% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameCherne
Model name276348
Product typeDrain Components

Questions about this item

Should I pick the 3 in. or 4 in. version of the 276348 plug for my pipe?

The 276348 is a single multi-size plug that covers both 3 in. and 4 in. pipes; it fits any pipe with an inside diameter between 2.8 in. and 4.25 in.

What does the 2.64 in. deflated diameter mean when the plug is inside a pipe?

At 2.64 in. deflated, the plug slides easily into pipes as small as 2.8 in. ID, then inflates to seal up to 4.25 in. ID.

How does the tank-valve air connection limit inflation pressure in practice?

The standard tank valve lets you inflate with a common air chuck; pressure is controlled by your regulator, not by the plug itself.

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