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8NPTthreaded Thread preparation connections Inspect threads on fiberglass adapters and threaded bushings. Do not use if threads are damaged. • Inspect threads on steel fittings for burrs. • Remove burrs from steel fittings by making up to mating steel threads the steel fitting and reinspect. r--------------I • Always dry fit fiberglass and steel threads without sealing compound be possible to dry fit the threads as shown in the following table.If the In general,threaded connections i numberof threads cannot be made up,select a new steel fitting. should be made up before adhesive- bonded joints to minimize the I Makingthejoint possibility of damage to bonded joints I Threads must be clean and dry before applying thread-sealing compound. caused by torquing the threaded connections.However,when installing 1 Use a nonhardening,solvent-free Teflon based thread sealant such e molded threaded bushings(tapered I Seal"The Heavyweight'orGasoila Soft Set pipe sealant. major nominal pipe size x threaded I Apply sealing compound to male and female threads. 1 minor nominal pipe size)make the 1 • Hand tighten the joint,then 1 tapered bonded joint first and allow it I use a wrench to get full Threads to Dry Fit and to P 1 to cure before making up the threaded I make-up.Standard pipe Nominal 1 joint.This order of joint make-up will 1 wrenches can be used with Pipe Size Threads to Ac care on fiberglass adapters: 1 preventdamagetothebushing. 1 Do notovertighten. (in) (mm) Dry Fit Thre L-------------J 112 40 4-5 The parts should makeup 2 50 4-5 the number of threads 3 80 5-6 shown in the table above. 4 100 6-7 Otherwise,a proper seal 6 150 7-8 may not be effected when tightened. Isolating flex connectors at the shear valve r————————, When flex connectors are directly buried at the dispenser,regulations fregt 1 Never use a pipe 1 require that they be cathodically protected and provisions be made to avoir wrench directly on the I current electrolysis and corrosion.In such cases the flex connector must b, 1 I isolated from the shear valve and from other metallic components in the sy, 1 pipe:wrench up only 1 1 ne on adapters. 1 Experience has shown that nylon isolation adapters do not perform well i L————————J the poor mechanical strength of the material results in creep or thread defo subsequent leakage. Ameron manufactures a 11k NPTfemale x i lh NPT male fiberglass-reinfor isolation adapter which may be mounted between the flex connector and tl valve. Follow the same general installation procedures as with other NPTtl fittings.After applying the sealing compound,hand tighten the adapter.Fir requires 1112 to 2 additional turns. sht l� 11h 21/8 _-1112 NPT Du. mal �� Fig.B-1.The Ameron fiberglass-reinforced male ao: isolation adapter is mounted between the — flex connectorandthe shear valve. 2y, 13A ss -�11k NPT 11V female fx (bl 12