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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TRANSMISSION <br />MAIN <br /> <br />INSULATING FLG. <br /> <br />THRUST BLOCK <br /> <br /> <br />BURIED VALVE <br />COVER <br /> <br />3'-0 MIN. <br /> <br /> <br />CONC. COLLAR <br /> <br /> <br />BLOWOFF COVER <br /> <br />5'-6 MIN. . <br /> <br /> <br />FLEX. COUPU NG <br /> <br />. FIGURE 4-2 TYPICAL BLOWOFF ASSEMBLY. <br /> <br />':,', <br />