NPC's Multi-Connector’s unique cut-out ring system, allows it to be used in a variety of pipe sizes. The multi-connector can accommodate pipe o.d. ranges from 1.7" to 6.4".
The last two numbers in the model number indicates the hole size [S106-12WP]
For hole sizes 8" and smaller (wedge style)
use torque wrench P/N 91819 for tightening wedge (5 ft. lbs.)
106 vs. 406: 106 Connector is 8" long - 406 Connector is 6" long
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