The Cherne 15"-16" Single-Size Underground Test-Ball (part #041-416) is a pneumatic blocking plug for large-diameter sanitary and storm sewer testing. Natural rubber inflates to block flow in 15" to 16" pipe (usage range 14.00"–16.25" ID). Rated for 13 PSI / 30 ft. head pressure at 25 PSI inflation. The 19.75" deflated length and 13.75" diameter require two-person handling and manhole deployment. Features 1/4" inflation thread and 3/8" eyebolt for poly-lift line.

Key Features

Single-size design — optimized for 15"-16" pipe
13 PSI / 30 ft. head — rated for sewer air pressure testing
Full blockage — complete shutoff, no bypass
3/8" eyebolt for poly-lift line, 1/4" inflation thread

Technical Specifications

Cherne Part Number	041-416
Pipe Size Range	15"-16"
Usage Range (Pipe ID)	14.00–16.25"
Bypass	None (full blockage)
Max Back Pressure	13 PSI / 30 ft.
Inflation Pressure	25 PSI
Body Material	Natural rubber
Deflated Length	19.75"
Operating Temperature	0°F to 125°F

Applications

Municipal sewer air pressure testing, storm drain isolation, large-diameter pipe blocking during construction and repair, and compliance testing on trunk mains. Deploy through manholes using eyebolts and poly-lift line. Always follow Cherne inflation and back-pressure guidelines — never exceed rated pressures.

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® 15-16 in. Enchufe de bola de prueba subterránea de tamaño único