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3.0 GEOFLEX PIPING CONNECTIONS Environ offers three types of piping connection systems for use with the GeoFlex Piping System. These three different piping connections can accommodate a wide variety of piping designs, layouts and installation applications. All three pipe connection systems are UL listed for use with fuels and in underground burial applications. Coax Couplings & Fittings These piping connections are made of a combination of glass reinforced plastic and stainless steel featuring a double wall design. Coax fittings require the use of the GeoFlex Coupling Machine to install the pipe couplings. Swivel Couplings & Fittings These piping connections are made of protected steel featuring a swivel nut connection with a Viton gasket seal. Swivel fittings require the use of the GeoFlex Coupling Machine to install the pipe couplings. Barbed Fittings These piping connections are made of protected steel featuring a barbed connection, eliminating the need for pipe couplings. The GeoFlex Coupling Machine is not needed for barbed fittings. 3.1 Coax Couplings & Fittings Coax couplings & fittings are a double wall design and are used to interconnect GeoFlex and GeoVent-mpiping_ These UL® listed composite couplings and fittings may be direct buried and are not necessarily required to be contained within containment sumps. Used with GeoFlex-D double wall piping, coax couplings and fittings permit the entire flexible piping system, including riser pipes to be secondarily contained, tested and monitored. The coax couplings & fittings are available in 1-1/2" and 2" sizes and are illustrated below. Air Fitting Test Shear Valves / Shear Valves,, Coax Shear Valve Steel Riser — Adapter Pipes Riser Jacket Coax Reser Riser Pipe _ Jacket Coax Coax Pipe Adapter\ Shear Valve Coax Connector Adapter Kit Nater Coax Male Adapter Kit / Coax Pipe Coax Tee Coupling \ /Fittings --- 3.1.1 Coax Pipe Couplings These couplings provide a means of connection from GeoFlex® piping to coax fittings and adapters. Coaxial pipe couplings attach to a flexible pipe section using the GeoFlex Coupling Machine. Each coupling assembly includes a stainless steel insert with two O -rings, ferrule with one 0 -ring, and a swivel nut. Available for both single wall and double wall applications. NOTE: Coax couplings require a different face plate to be used with the GeoFlex coupling machine than is used with the swivel couplings. 3.1.2 Coax Pipe Adapters These adapters are designed to connect one end of a flexible pipe section fitted with a coax pipe coupling to a 2" NPT threaded female coupling or fitting.The adapter has a 1/4" threaded end plugged test port for future installation of coax test tube for testing the interstitial space of the GeoFlex-D, or M piping. Coax Elbow Fitting 3.1.3 Coax Connector Coupling These connectors are designed to connect two flexible pipe sections fitted with coax pipe couplings. This is ideal when using extra -long piping runs and when connecting short lengths of flexible piping together. They can be direct buried, so containment sumps are not required. 3.1.4 Coax Tee Fitting These tee fittings may be used in two different applications. The first application is to connect two sections of GeoFlex piping fitted with coax couplings to a riser pipe. This application is used in any configuration where connection of a tee to a standard threaded riser pipe or flex connector is needed. Connection to a threaded riser pipe requires the use of a coax riser pipe adapter or riser jacket kit described later in this publication. The second application for coax tee fittings