O-Z/Gedney™ EXPB expansion/pull box fittings allow for expansion and contraction in a run of rigid conduit (2" in either direction for a total movement of 4"). They can be used to provide a convenient pull box to supply an intermediate pulling point in the conduit run. For applications involving IMC, a 15" minimum length of rigid conduit should be used entering the expansion fitting due to the slightly smaller O.D. of the IMC.
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