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Center coupling shells over all primary piping sleeve couplings. <br />If space is limited between two primary fittings such that a full coupling will not <br />fit, the coupling can be cut approximately in half. <br />After dry fitting the Containment piping, remove it from over the primary piping <br />and sand the ends of the Containment pipe and the bonding surfaces of the <br />Containment Fittings with coarse sandpaper, emery cloth or flapper sander. Brush <br />all dust off the bonding surfaces with a clean rag or clean paintbrush. Care must <br />be taken to not touch or in any way contaminate the sanded surfaces prior to <br />bonding because the adhesive will not bond properly and leaks may occur. <br />