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lak i ENVIRONMENTAL HEALTH JOINT ASSEMBLY DEPARTMENT Bell x Spigot Joint The spigot must be aligned and locked in the bell. A cocked or misaligned joint will not lock up and may lead to joint fail- ure during testing or at a later date. When the temperature is be- . low 65°F (18.3°C), pre -warm the bonding surfaces (after the joint has been cleaned). Caution: If a solvent is used, » evaporation may be slow at ; extremely low temperatures. Use a heat gun and apply heat uniformly to the bell and spigot until warm (not hot) to the touch. Check temperature by touching outside of the bell and inside of the spigot to avoid contact with clean bonding surfaces. If hot to the touch, let cool before applying adhesive. If an electric heating collar is used to pre -warm, place the joint togeth- er dry, then heat the O.D. of the bell to avoid contaminat- ing the spigot. Brush adhesive on both surfaces, applying a thin, uni- form coating. To minimize contamination, apply adhesive to the bell first. Adhesive should always be worked into the prepared surface by applying pressure during ap- plication. Also lightly coat the cut end of the pipe wall with adhesive. This will wet out the prepared surface and maintain the required thin bond line. Be sure all surfaces in the bell and on the spigot and cut end of the pipe are uniformly covered. Excess adhesive will make the joint more difficult to lockup and can result in a flow restric- tion. Connections into fittings are made us- ing the normal bell and spigot meth- od. A threaded (..A.B.) spigot can be bonded into a smooth bell (fitting), or a smooth spigot can be bonded into a threaded (T.A.B.) bell. • Align and lock the joint. For fit- tings, insert spigot into the bell 24