If  location  of  tapping  is  desired  other  than  regular,  we  can
furnish  special  tappings,  as  shown  in  above  illustration,  "A"
or  "C,"  1^-inch  tapping  or  smaller;  "B"  or  "D,"  1^-inch
tapping  or  smaller.  For  distance  between  centers  and  free-
air  area  between  sections  of  Indirect  Radiators  see  page  215.
126


Sterling  Indirect  Radiators

For  Steam  or  Water


Single  Section

Each  section  of  Sterling  Indirect  contains  20  square  feet  of
heating  surface.  Length  of  section,  36%  inches.  Height,  15%
inches.
Width  each  section  occupies  in  stack,  3j^  inches;  or,  when
specially  ordered  this  can  be  increased  to  3%,  4,  4*4,  or  4^
inches,  by  using  extra  long  nipples,  to  give  additional  air
area  between  sections.  Sections  are  shipped  separately  un-
less otherwise  ordered;  when  ordered  assembled  are  shipped
in  stacks  of  five  or  six  sections.
The  nipples  used  for  connecting  sections  are  extra-heavy
2-inch  right-  and  left-hand  threaded,  with  hexagon  nut  at  the
center.
Unless  otherwise  ordered,  Sterling  Indirects  are  tapped  2
inches  right-hand  on  supply  end,  and  2  inches  left-hand  on
return  end,  and  can  be  bushed  to  any  smaller  size  desired

If  location  of  tapping  is  desired  other  than  regular,  we  can
furnish  special  tappings  as  shown  in  above  illustration  at  "E,"
"F,"  "G,"  or  "H,"  \Y2  inches  or  smaller.
For  distance  between  centers  and  free-air  area  between
sections  of  Indirect  Radiators,  see  page  215.
127


Data  on  Indirect  Radiators

All  AMERICAN  Indirect  Radiators  are  shipped  with
sufficient  nipples  to  put  the  stack  together  on  the  job.
If  the  sections  are  assembled  at  our  Plants  an  extra  charge
is  made  for  the  work.
All  indirect  air-valve  tappings  are  regularly  made  ^  inch.
