The Cherne 3/4"-1-1/4" Single-Size Plumbing Test-Ball (part #270-008) is a pneumatic test plug for DWV testing on small-diameter residential pipe. Natural rubber construction inflates to seal pipes from 3/4" to 1-1/4" ID. Rated for 17 PSI / 40 ft. head pressure at 65 PSI inflation. Ring and chain assembly prevents draw-in. Standard Schrader valve (tire-type) for inflation with any standard air source.

Key Features

Pneumatic inflation — natural rubber expands to seal round and out-of-round pipes
17 PSI / 40 ft. head pressure — rated for DWV and plumbing code testing
Schrader valve (tire-type) — inflate with any standard air source, field-replaceable
Ring and chain assembly — prevents draw-in during inflation
Natural rubber construction — excellent expansion memory for reliable sealing

Technical Specifications

Cherne Part Number	270-008
Nominal Pipe Size	3/4"-1-1/4"
Usage Range (Pipe ID)	0.75–1.30"
Max Back Pressure	17 PSI / 40 ft.
Inflation Pressure	65 PSI
Body Material	Natural rubber
Inflation Fitting	Schrader valve (tire-type, replaceable)
Safety	Ring and chain assembly (prevents draw-in)
Deflated Length	3.75"
Deflated Diameter	0.73"
Weight	~2 lbs
Operating Temperature	0°F to 125°F

Applications

DWV pressure testing for code compliance, residential and commercial plumbing inspections, stack testing, and sewer air tests. The pneumatic design seals quickly and conforms to out-of-round pipe — faster than mechanical plugs for multi-plug test setups. Always follow Cherne inflation guidelines and never exceed rated inflation pressure.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — same-day shipping on in-stock items, tax-exempt purchasing for qualified accounts.

Cherne® 3/4"-1-1/4" Tapón de prueba de fontanería de tamaño único