The Cherne 3" Hub-Fit Gripper (part #270-538) is a mechanical test plug for 3" hub fittings and bell-end pipe connections. Rated for 13 PSI / 30 ft. head pressure. Fits 3" hub and bell connections (usage range 3.44"–3.53" ID). Yellow high-visibility color for easy location inside pipe. At 9.5 oz and 2.4" long, it’s a compact field tool. Glass-reinforced ABS body with natural rubber O-ring and galvanized carriage bolt — wing nut operation, no tools needed.

Key Features

Hub-fit design — sized for hub fittings and bell-end pipe connections
Yellow high-visibility — easy to locate inside the pipe
13 PSI / 30 ft. head pressure — rated for DWV testing
Mechanical wing nut expansion — no inflation, no tools required
Natural rubber O-ring — reliable seal on round and out-of-round surfaces

Technical Specifications

Cherne Part Number	270-538
Nominal Pipe Size	3"
Usage Range	3.44–3.53"
Max Back Pressure	13 PSI
Max Head Pressure	30 ft.
Body Material	Glass-reinforced ABS plastic
Seal	Natural rubber O-ring
Hardware	Galvanized carriage bolt, extra-large zinc wing nut
Operating Temperature	0°F to 125°F
Length	2.4"
Weight	9.5 oz
Pipe Compatibility	Hub fittings, bell-end pipe
Color	Yellow

Applications

Testing at 3" hub joints in cast iron, PVC, and ABS DWV systems. The hub-fit design fills the gap between the pipe bore and the larger hub ID — a common testing challenge on 3" drain and vent connections in residential and commercial plumbing.

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" Hub-Fit Gripper® Plug