National boilers, radiators, and specialties: catalog no26 . lleable cast-iron. After many discouraging_ experi-ments the National push nipple ofresilient malleable cast-iron was per-fected. The statement that the Na-tional Radiator Company was thefirst to successfully use this perfectmetal-to-metal joint is as yet unchal-lenged. The joint made by theNational push nipple is logical—bothfrom a standpoint of manufacture andactual use. National push nipplesneed no gasket or other form ofpacking to insure against leaks—the nipple itself makes a perma-nent, watertight joint. An important reason for
National boilers, radiators, and specialties: catalog no26 . lleable cast-iron. After many discouraging_ experi-ments the National push nipple ofresilient malleable cast-iron was per-fected. The statement that the Na-tional Radiator Company was thefirst to successfully use this perfectmetal-to-metal joint is as yet unchal-lenged. The joint made by theNational push nipple is logical—bothfrom a standpoint of manufacture andactual use. National push nipplesneed no gasket or other form ofpacking to insure against leaks—the nipple itself makes a perma-nent, watertight joint. An important reason for Nationalpush nipple assembled, radiators isthat they can be taken apart and puttogether again, when necessary, inone-third of the time required of screwnipple assembled radiators—and nospecial tools are required. Oftentimes a radiator to be installed on the second,third or higher stories is too heavy to handle and must be taken apart. Thisis one reason why radiators assembled with National push nipples are partic-ularly desired by the steam The National Push Nipple 56 NATIONAL RADIATOR NIPPLES finJhiftf! ?2sh ni?]?!?s are ?ade- of heayy resilient malleable cast-irononentts10 TW^vl^ pa?.ofvan Jnch anl-fit accurately in the machinedopenings. 1 hey may he used in hand or machine assembling. When used forhand assembling special repressed nipples are furnished. In every instantthe jomt made will remain absolutely tight under any condition AH NationalRadiators are assembled with National Push Nipples. ^auonai Some 5,000 individual National radiators were installed in the Eouitablet£S&NeW Y0Tk m 1914- ThiS Said t0 be the largestofficel^dTnfin thesSe°5f 000 N^nnlf1!?P^leakKhas developed or is ever likely to develop inat J!?!?1 aPParatus is made so well that the user will get the most service Sectional View of National Push Nipple Joint ofNational Premo Radiator
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteambo, bookyear1920
