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v 9.1 .1 Coax Pipe Couplings -Single Wall This pipe coupling option is connected to OPW-FCS's single wall piping. Having no exposed metal components, they are not susceptible to corrosion. These couplings will connect with all coax fittings and adapters. 9.1.2 Coax Pipe Couplings -Double Wall This pipe coupling option is connected to OPW-FCS's double wall piping. Having no exposed metal components, they are not susceptible to corrosion. Their double wall design allows the interstitial space of the double wall piping to pass through the coupling as well as the interconnected coax fittings and adapters. 9.1.3 Swivel Pipe Couplings This pipe coupling is connected to either OPW-FCS's single wall or double wall piping. Made entirely of stainless steel, the fittings must always be installed inside a containment sump. These fittings, when coupled with double wall flexible piping, require rubber test boots, connector tubes and test tubes to be installed for secondary pipe testing and continuous monitoring capabilities. These couplings will interconnect with all swivel fittings and adapters. 9.2 Piping Application Options There are a variety of piping and containment options which may be used for a complete OPW-FCS flexible piping system. 9.2.1 Pressure Piping Systems For this type of piping system there are a variety of piping applications available. They are described as follows: Using Dispenser Sumps This application includes the use of a tank sump inter- connected with one or more dispenser sumps using flexible piping which may be directly buried or installed inside Duct chase piping. Because all fittings are contained, either coax or metallic couplings and fittings may be used. 9.2.2 Suction Piping Systems For this type of piping system, there are a variety of piping applications available. They are described as follows: Using Shallow Dispenser Sumps This application includes the use of a tank sump interconnected with a dispenser sump using double wall - flexible piping which may be directly buried or contained inside the Access Pipe. All fittings are contained, therefore either coax or metallic couplings and fittings may be used. 10.0 INSTALLING ACCESS PIPE Access Pipe is a large diameter corrugated flexible piping that adds additional protection to OPW-FCS's flexible piping and allows the pipe to be removed and replaced without excavation. Measuring and cutting Access Pipe should be done prior to measuring and installing the primary piping. OPW-FCS recommends the installation of Access Pipe for all installations of flexible piping. 11 F/EmWORKS ®Y OPW FEELING CONTAINMENT SYSTEMS 10.1 Access Pipe Measuring Prior to measuring for the Access Pipe, install the Access Pipe entry boots into the sidewall of the dispenser sump. Refer to the flexible entry boots installation manual for the proper installation procedures for these entry boots. Measure the distance from the sump wall of the first sump to the sump wall of the second sump. Make sure to follow the contour of the trench. Add 4.25" to this figure and transfer measurement to the Access Pipe. 10.2 Access Pipe Cutting Transfer measurement to the -, µ Access Pipe and make cut in the closest valley. a: Insert the black stiffener into the 10.3 Access Pipe Connections Access Pipe, then insert the Access Pipe into the flexible boot from outside of the sump. Be sure the edge of the Access Pipe is flush with the inside face of the boot. After the Access Pipe has been positioned, install the band clamps around the boot. Repeat this same installation procedure with the other end of the Access Pipe section. 11.0 TANK SUMP PLUMBING TREES The type of piping application used shall determine what type of piping connections shall be made inside the tank sump. NOTE: Prior to assembling plumbing trees, be sure the OPW-FCS fittings are aligned with the pipe entries through the sump wall to prevent excessive bending of the pipe within the sump. __11.1 Pressure Supply Systems For pressure piping systems, the flexible piping may be connected to the tank's submersible pump using the Flex fittings or a flexible connector. For this application, both single and dual line connections may be made. 11.1.1 Single Pipe Line To Pump Connections This application includes a plumbing tree assembly which interconnects the submersible pump to a single flexible piping line. A typical pipe connection assembly would include a ball shut-off valve and standard plumbing elbow