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Ji.i� Y ,I Lvit <br />ENVIRONMENTAL HEALTH <br />C EPA; DTII""ENT <br />Apply Adhesive to 3" <br />r'„t F 1� of DL_. Glued Areas <br />aquare-vut ripe Inas Hatt -Coupling <br />(Not Tapered) (Full Coupling Optional) <br />Major damage (over 3 inches (75 mm) in length) <br />Damage in which more than three inches of pipe must be re- <br />moved is considered major. Major damage is typically caused <br />by excavation equipment or large objects striking the pipe. <br />Repair major damage with a replacement nipple (and any nec- <br />essary fittings) and one or more repair couplings. <br />For damage less than 12 inches (300 mm) in length, a <br />single full-size, 14 inches (350 mm) long coupling will <br />provide the required 1 inch (25 mm) pipe insertion at <br />each end. <br />To make repairs greater than 12 inches (300 mm) in <br />length, use two full-size or half -couplings to join the re- <br />placement nipple with the existing line as shown. <br />Follow the guidelines given for minor damage, abrade all <br />bonding surfaces, coat all cut pipe ends with adhesive <br />and observe spacing and insertion depth requirements. <br />39 <br />