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Yellow cylindrical test ball plug with tire valve and ring chain, 6.5 in deflated length

Cherne

Cherne 270040 Test Ball Plug 6.5 in Deflated Length

SKU CH-ENNE-EF729 MPN 270040

Test ball plug with ring-and-chain tether for 3.41–4.25 in pipes, 6.5 in deflated length

  • TypeDrain Components
  • MaterialHAWA
  • Tests 3.41–4.25 in pipes with a 3.25 in deflated diameter
  • 5 in deflated length fits deep pipe access points
  • Tire-valve air connection enables standard pump inflation
  • Ring-and-chain tether prevents loss during pressure tests
  • Textured body surface improves grip inside wet pipes

Purpose-built pipe-testing plug

The Cherne 270040 is a pneumatic test ball designed to seal pipe interiors during pressure testing. It fits pipes with an inside diameter between 3.41 in and 4.25 in, making it suited for 4 in nominal pipe sizes. A tire-valve air connection allows inflation with standard shop compressors.

Integration with test equipment

The plug’s deflated length of 6.5 in and diameter of 3.25 in let it pass through clean-outs and tight bends before inflation. A built-in ring and chain provide a secure tether for retrieval and positioning. No bypass connection is present, so the line must be isolated for a straight pressure hold.

Upgrade considerations

This model replaces improvised mechanical plugs or older balls lacking a tether, reducing the risk of loss inside the line. The jump is worth it when a reliable, reusable seal is needed for recurring hydrostatic or pneumatic tests on 4 in drain, waste and vent systems.

Highlights

  • Tests 3.41–4.25 in pipes with a 3.25 in deflated diameter
  • 5 in deflated length fits deep pipe access points
  • Tire-valve air connection enables standard pump inflation
  • Ring-and-chain tether prevents loss during pressure tests
  • Textured body surface improves grip inside wet pipes

Specifications

TypeDrain Components
MaterialHAWA
BrandCherne Industries
Model270040

Questions about this item

What is the minimum pipe inside diameter the Cherne 270040 can seal?

The plug seals pipes with an inside diameter of at least 3.41 inches.

How hot does the tire-valve air connection get during all-day inflation?

The tire-valve connection stays at ambient temperature because no compressed-air heater is involved.

Which inflation tool must the buyer already own to use the tire-valve fitting?

A standard tire inflator or compressor with a Schrader chuck is required to fill the plug.

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