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Cylindrical zinc-plated steel test-ball plug with tether ring and chain, deflated diameter 1.21 in, length 5.56 in

Cherne

Cherne 276128 Multi-Size Test-Ball Plug 1.25-2.1 in

SKU CH-TADS-Y5VCS MPN 276128

Inflates to seal pipes from 1.25 in to 2.1 in ID with a 1.21 in deflated diameter and 5.56 in length

  • TypeDrain Components
  • Fits pipes from 1.25 in to 2.1 in inside diameter
  • Compact 1.21 in deflated diameter eases insertion into tight lines
  • 56 in deflated length provides reliable sealing surface
  • Zinc-plated steel body resists corrosion on job sites
  • Tank-valve air connection with tether ring and chain simplifies inflation and retrieval

Multi-Size Pipe Plug

The Cherne 276128 test-ball plug fits pipe inside diameters from 1.25 to 2.1 inches. It serves plumbers and maintenance crews who need a single tool for pressure testing or temporary blockage across that range. Zinc-plated steel construction resists corrosion during repeated use. The integrated tether ring and chain allow secure retrieval after deployment.

Deflated Profile and Air Connection

When deflated the plug measures 1.21 inches in diameter and 5.56 inches long, easing insertion through clean-outs or tight bends. A standard tank-valve air connection accepts common inflation equipment without adapters. No bypass port is present, so the plug seals the line completely during testing. Textured body surfaces improve grip inside wet pipe walls.

Sustained Pressure Behaviour

Under sustained test pressure the plug maintains its expanded diameter against the pipe interior without creeping. The zinc-plated steel body and reinforced head distribute load evenly during long-duration holds. Absence of a bypass means the seal remains absolute until deliberate deflation. Retrieval chain stays accessible for controlled removal after the test cycle ends.

Highlights

  • Fits pipes from 1.25 in to 2.1 in inside diameter
  • Compact 1.21 in deflated diameter eases insertion into tight lines
  • 56 in deflated length provides reliable sealing surface
  • Zinc-plated steel body resists corrosion on job sites
  • Tank-valve air connection with tether ring and chain simplifies inflation and retrieval

Specifications

TypeDrain Components
BrandCherne
Model276128

Questions about this item

How do I insert the Cherne 276128 plug through a 1.25 in pipe opening and what step is most often missed?

Deflate the plug to its 1.21 in diameter, push it past the 1.25 in minimum bore, then inflate through the tank-valve stem until it seals against the pipe wall; the step most often missed is re-checking pressure after the first minute as the rubber relaxes.

What part of the Cherne 276128 will need replacement first and how can I tell?

The rubber bladder and the tank-valve stem are the wear items; replace the plug when the bladder no longer holds 2.1 in pipe pressure or the valve core leaks air during a soap-bubble test.

At what pipe size does the Cherne 276128 reach its sealing limit during a long test?

The plug is rated for a maximum 2.1 in inside diameter; sustained pressure at or near that size will show leakage first as the bladder stretches to its design limit.

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