The Cherne 4" Hub-Fit Gripper (part #270-548) is a mechanical test plug for 4" hub fittings and bell-end pipe — the most common hub size in residential plumbing. Rated for 13 PSI / 30 ft. head pressure. Fits 4" hub and bell connections (usage range 4.41"–4.53" ID). Yellow high-visibility body stands out inside the pipe. Glass-reinforced ABS with natural rubber O-ring and galvanized hardware — wing nut tightening, no tools or inflation 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	270-548
Nominal Pipe Size	4"
Usage Range	4.41–4.53"
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
Weight	11.9 oz
Pipe Compatibility	Hub fittings, bell-end pipe
Color	Yellow

Applications

DWV pressure testing at 4" hub joints, building inspections on bell-end connections, stack testing through 4" hub fittings, and any scenario where a standard gripper plug is undersized for the hub diameter. The most frequently ordered Hub-Fit size for residential plumbing testing.

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® 4" Hub-Fit Gripper® Plug