Is there a way to form a watertight sanitary service connection to a 36" PVC carrier pipe inside a 54" steel casing pipe? Spacers will be installed on the 36" carier pipe centering it within the 54" steel casing. A vertical service riser needs to extend through the top of the casing and connect to the carrier pipe. Grouting the space between the service riser and the outer casing wall is not an option. Is there an effective way to ensure a durable watertight seal between the core through the top of the casing pipe and the outer wall of the service riser?
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