National boilers, radiators, and specialties: catalog no. 26 (1920)
National Radiator Company · National Radiator Company · leaf 55
nof tapping is desired other than regular soecial tar, Assembling th^1?, SUre1that *he Otters or marks designating SS&SS^Tface the same way- This insuref For convenience in handling, indirects are shippedloose, unless expressly ordered to be built into stackswhen a charge of one cent per foot… … A Push Steel Nipple in Use LessThan Four Years PROBABLY no other feature ofcast-iron radiator constructionhas been so widely discussed-—nor as much misrepresented—as theradiator nipple and the propermethod of making a permanent tightjoint between the sections. Up to 1905 fully 90 per cent of…
