A conduit joint sealed with a Polywater FST dam and Polywater FST-250 sealing compound, or an approved alternative, prevents moisture or gas ingress. Foam dams installed at both ends of the sealing compound contain the material within the conduit. The assembly applies to horizontal conduit runs and vertical conduit runs entering a meter box mounted above a slab. Sealing compound placed between the foam dams creates a secure plug around the internal wiring.
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