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• • • leg of the 45° containment elbow and the side outlet run of the containment tee. Refer to Table 2.3.1 for the maximum length that can be removed and for the minimum nipple length of both product piping and secondary containment piping. To prevent interference of the pipelines, do not locate two containment fittings closer than shown in Table 2.3.2, Fig. 2.3.1. SECTION 4 • TERMINATION CONNECTIONS 2.4.1 'Termination at the Storage Tank Termination of the secondary containment piping system at the storage tank is accomplished using a termination fitting with Y" female NPT threaded outlet (see Fig. 2.4.1). The Y4" threaded outlet allows easy access for pressure test- ing of the secondary containment piping system, and may Impact Valve Fiberglass Threaded Adapter IBell x Male) !Flexible nector FIGURE 2.4.2 RED THREAD IIA Pipe Sr Fittings SECTION 4 ♦ Termination Connections also be used as an access for a leak detection probe. 2.4.2 Termination at the Dispenser Termination of the secondary containment piping system at the dispenser is accomplished using a termination fit- ting with or without the Y4" NPT threaded outlet (see Fig. 2.4.2). To facilitate ease of terminating, special bell x male adapters or special sleeve couplings for secondary contain- ment are available for use with secondary containment termination fittings. The special adapters and sleeve cou- plings have been machined on the O.D. to fit the sec- ondary containment termination fittings. If machined bell x male adapters are not available, standard male threaded adapters or sleeve couplings may be used (see Table 2.4.1). Non -machined surfaces must be sanded to fit the secondary containment fittings (see Fig. 2.4.3). Scarf C.D. of pipe so that the fitting halves fit together when assembled by hand. If there is a gap between the fitting halves when assembled by hand, pipe must be scarfed more, FIGURE 2.4.3 25