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Dry fitting secondary Containing short runs <br /> containment systems <br /> (cont.) For primary runs under four feet in length,astandard 14-inch containment coupling <br /> and shortp•P I e nipples can be substituted for 31b-inch containment piping. <br /> PP anmentp•n p 9 <br /> ^` L¢4k <br /> III � 14 <br /> Fig. 7-10.Contain short runs with a — <br /> standard containment coupling and — <br /> short containmenti e nipples. <br /> A P AA <br /> Containing crossovers and very short runs <br /> Make crossovers by using 45°elbows and tees in both primary and containment.In <br /> this+Wray a minimum 4-inch vertical clearance can be provided between the lines.Limit <br /> the length of containment <br /> Containment _ ` nipples at crossovers and <br /> 4s°elbow D+1'r2 other very short runs to the <br /> face-to-face distance <br /> �• y between the secondary <br /> Fig. 7-i 1. Atcrossovers and very short - ` fittings plus Vh inches in <br /> runs where even a containment half- ® order to allow sufficient <br /> coupling cannot be included,cut the space to move the <br /> containment pipe so that a minimum 4 <br /> 3/inch insertion depth in the min containment nipple while <br /> containment fittings is maintained. T - -0- working on the primary. <br /> ��, This length will provide an • <br /> l insertion depth of inch of <br /> Containment tee pipe in the containment <br /> - fittings. <br /> Centralizers <br /> Centralizers are not required in Dualoy 3000/1-containment systems unless in-pipe <br /> detection lines have been specified by the owner.In such cases,contact Ameron for <br /> availability. <br /> Take care not to allow stones and backfill to enter the annular space between primary <br /> and containment as this may result in leaks. <br /> 8 <br />