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Flexible Underground Piping Manual trench. Add 4.25" to this figure and transfer measurement to the Access Pipe. 10.2 Access Pipe Cutting Transfer measurement to the Access Pipe and make cut in the closest valley. 10.3 Access Pipe Connections Insert the black stiffener into the 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 installed between the submersible pump and the pipe adapter, as shown. For coax type connections, a plumbing assembly fitted with a standard plumbing elbow fitting would be connected to a coax F/exW Q R KS BY DPW FUELING CONTAINMENT SYSTEMS pipe adapter. This accommodates the connection of a coax pipe coupling installed on the end of a flexible pipe section. The adapter is attached by first applying the specified thread sealant to the male pipe threads. Then hand tighten firmly followed by two full turns with a pipe wrench. CAUTION: Do not apply the plumbing wrench to the section of the pipe adapter which contains the test port. NOTE: For coaxial fitting NPT threads, use only UL classified thread sealant specifically formulated for gasoline and petroleum products. Do not overtighten coax type fittings. For swivel type piping connections, a plumbing assembly fitted with a standard plumbing elbow fitting would be connected to a swivel or barbed adapter. The arrangement accommodates the connection of a swivel pipe coupling installed on the end of a flexible pipe section. 11.1.2 Dual Pipe Lines To Pump Connections This application includes a plumbing tree assembly which interconnects the submersible pump to two flexible piping lines. A typical connection assembly would include a tee fitting or a dual adapter fitting fitted with a ball shut-off valve and two standard plumbing elbows as shown. For coax type connections, a plumbing assembly fitted with two standard plumbing elbow fittings would be connected to two coax pipe adapters. This arrangement accommodates the connection of coax pipe couplings which are installed on the end of two flexible pipe sections. The adapter is attached by first applying the specified thread sealant to the male pipe threads. Then hand tighten firmly followed by two full turns with a pipe wrench. CAUTION: Do not apply the plumbing wrench to the section of the pipe adapter which contains the test port. NOTE: For coaxial fitting NPT threads, use only UL classified thread sealant specifically formulated for gasoline and petroleum products. Do not overtighten coax type fittings. For swivel type piping connections, a plumbing assembly fitted with two standard plumbing elbow fittings would be connected to swivel or barbed adapter. This arrangement is to accommodate the connection of swivel pipe couplings installed on the end of two flexible pipe. 11.2 Suction Supply Systems For suction systems, all flexible piping connections are made directly into the tank. In this application typically a tank manway cover would be fitted with a multitude of female threaded tank fittings. These tank fittings should have pipe fittings, either a standard plumbing elbows or capped tees