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DRY FITTING Place one-half of Containment fitting under dry fitted primary lines to measure <br /> SECONDARY length of Containment piping to be cut. Cut Containment piping to allow one and <br /> CONTAINMENT SYSTEM one-half inch for seating into each fitting. Use at least one Containment coupling <br /> (Cont'd) between all fittings,where practical. Use of Containment couplings between fittings <br /> allows inspection of primary coupling in line and/or provides the ability to pull the <br /> Containment pipe back from primary fittings for inspection during testing. <br /> When crossing over lines, the 45° and 90° Containment fittings will accommodate <br /> close nipples on primary piping. <br />