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u N./ Step#4: Add urethane sealant to the sealing surface of Step#3:Remove the dispenser sump lid from the poly the boot between each stud of the backer plate/stud base unit. In the vicinity of the dispenser's internal pip- assembly (APT recommends Bostik 1100 or equivalent ing connections, insert the spring loaded uni-strut nuts urethane sealant). Then, from outside the sump base, from the stabilizer bar kits into the channels located on insert the backer plate/stud assembly. If necessary, use a the inside of the dispenser sump lid. There should be rubber or plastic mallet to tap this assembly into place. two on each side for each stabilizer bar. Step #5: Add the same urethane sealant to the sealing Step #4: Add the mounting plate to the emergency surface of the entry boot, then place over the studs, mak- shut-off valve and loosely fit onto the adjustable stabi- ing sure the boot faces the inside of the sump.Add com- lizer bar, utilizing the 3/4" bolts and self-locking nuts. pression plate and nuts. Then, using a 7/16" socket, Do not tighten at this time. tighten all nuts using a cross pattern until the boot is sealed. Dispenser Sump Installation Note: APT requires no special 900 elbows or tees for installation, so standard galvanized schedule 40 fittings and riser pipes can be utilized within the dispenser sumps. Also, fire rated flexible connections can be sub- Step #5: Set the lid back on to the dispenser sump stituted for galvanized riser piping. APT fittings utilize lower portion, and insert the stabilizer bar with the standard 1-1/2" or 2" NPT male threads. emergency shut-off valve into position. Hand-tighten the bolts into the spring loaded uni-strut nuts in the side Step#1:Before laying pipe,secure all dispenser sumps channels. It is helpful to only hand-tighten, so that the at the proper location and height, making sure there is a stabilizer bar and emergency shut-off valve can be bed of proper backfill under each sump. Utilizing adjusted up or down and from side to side. Adjust the straight sections of rebar, angle iron or wooden stakes, emergency shut-off valve so that the shear section is level secure all four corners of the dispenser sumps in place. with the upper step of the dispenser sump lid. Align the emergency shut-off valve with the internal piping con- Step #2: Utilizing the base information provided by nection mark made on the sump wall in step #2. the dispenser manufacturer, measure across the top of the dispenser sump and mark the location where the Step #6: Now, look at the overall piping layout and riser pipes will connect to internal dispenser piping. slope requirements, and determine the elevation where the flexible entry boots should be mounted. A nice fea- ture of the sumps is that they can be cut in 3" incre- 4 ments to adjust the slope of the piping. This allows the entry boots to be mounted at the same height in each sump while still providing for good flow back to the tanks. Once this dimension is determined, measure from the bottom of the emergency shut-off valve to the center of the point where piping will enter or depart, allowing for the amount of riser pipe that will thread into the emer- gency shut-off valve and the 900 elbow or tee fitting, then mark the spot on the dispenser sump side wall. 115