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R F ___' <br />:n C 7"1 V E D <br />Jk" l i 7 Lu 1 1 <br />ENVIRONMENTAL HEALTH <br />G17P"RTMEN7 <br />Jump -overs and Crossovers <br />Assemblies for crossing lines can be made in one of two ways. <br />For lines where the tee and 45° elbow need to be very close (a <br />jump -over), the clamshell fittings can be cut at the beginning <br />of the tapered portion on the branch of the tee and one leg of <br />the elbow. A piece of single wall pipe of the next larger size <br />can be used to connect the clamshell fittings (Jump -Over). For <br />lines where there is sufficient distance between the tee and 45° <br />elbow to allow for the full clamshell fittings, the crossover can <br />be made by simply bonding the fittings and clamshells to a <br />piece of standard coaxial pipe. (Cross -Over) <br />Jump -over assembly made with next larger size single-wall <br />containment pipe and clamshell fittings cut at start of taper to <br />allow minimum length. <br />B \\ <br />0 <br />A <br />Cross -Over <br />Cross-over assembly made with LCX pipe and full clamshell <br />fittings for installations where longer length is allowed or need- <br />ed. <br />65 <br />