SC Water And Sewer Plants Practice Questions - South Carolina Water And Sewer Plants Contractor Examination Exam

Per the DIPRA Installation Guide, why are bell holes excavated at each ductile iron pipe joint?

To store joint lubricant and spare gaskets at each joint To provide just enough room to assemble the joint, including polyethylene overlap, while keeping the pipe barrel supported on the trench bottom To create a sump so groundwater drains to each joint To allow the pipe to rest only on the bells for grade control

Correct Answer:

To provide just enough room to assemble the joint, including polyethylene overlap, while keeping the pipe barrel supported on the trench bottom

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