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Dry f itting secondary Access to primary fittings <br /> containment systems Ameron secondary containment piping provides convenient access to primary fiffings <br /> / (cont. during bonding,testing and inspection by using lengths of 3'h-inch containment pipe <br /> and appropriate reducing couplings.In most layouts the primary runs can be contained <br /> by three pieces of containment pipe,as shown in Fig.7-5.The containment pipe at the <br /> ends of the run are standard diameters one size larger than the primary line;the middle <br /> piece is 31hrinch containment pipe.In a'3 over 2'system,the 31h-inch containment <br /> section slips over the 3-inch containment pipe as shown in Fig.7-7;in a'4 over 3' <br /> system,the 3Yz-inch containment section slips inside.By manipulating the pipe <br /> sections,ready access to the primary fittings can be achieved. <br /> I I I I <br /> Fig.7-5.Most primary tuns can be <br /> contained by three pieces of <br /> containment pipe. <br /> Runs of containment piping are closed using <br /> 31h x 3-inch reducing closure pieces in'3 over 2' <br /> Fig.7-6.Containmentreducers are a systems and 4 x 3'h-inch reducing closure <br /> furnished with a pipe stop to a <br /> prevent over-insertion of the pipe pieces in'4 over 3'systems. <br /> on the large end. <br /> e Sand shaded areas <br /> before applying adhesive <br /> Atypical containment installation is seen in Figs.7-7 and 7-8.Easy access to the primary <br /> joint at one end of the run is achieved by placing the end section of the containment <br /> inside the center section.Similarly,access to the joint at the other end of the primary <br /> line is achieved by placing the other end length of secondary inside the larger center <br /> section.The final configuration is shown in Fig.7-5. <br /> Fig.7-7.Easy access to the <br /> primaryjoints at the ends of I <br /> a run maybe achieved by <br /> sliding the end containment <br /> sections inside the center <br /> sections as seen here — — — <br /> and in Fig.7-8. <br /> Fig.7-8.Access to thejoint at the other <br /> end of the line is achieved by placing <br /> the length of secondary inside the I <br /> largercentersection.The final <br /> configuration is shown in Fig.7-5. <br /> Fig 7-9.When primary runs Unexposed <br /> exceed 20 feet in length,thus <br /> requiring two ormore lengths I pnmary Do not locate pdmary couplings I <br /> of pipe,the primary coupling is in this zone(same both sides) <br /> located in the center of the run <br /> foreasyaccess. <br /> 40 <br /> 7 <br />