38
RISER
AT
LEAST
1"
PLUG FOR
CLEANOUT
B.
A.
C.
FULL SIZE
AT
LEAST 1"
ECCENTRIC REDUCER
45°
PREFERRED
ACCEPTABLE
RADIATOR
BRANCH
RISER
ANCHOR
RISER
RISER
DIRT POCKET
DRIP PIPE
MAIN
45° ELL
WET RETURN
B
Constant
11
1
⁄
4
°
5.126
22
1
⁄
2
°
2.613
30°
2.000
45°
1.414
60°
1.155
Upfeed branch connection
taken from main at 45°
Expansion joint made up of
pipe for risers
Drop riser branch taken
from top of main at 45°
Drop riser taken from
bottom of main
Riser branch taken from bottom of
main and dripped into wet return
Method of taking double radiator
branch connections from riser
Method of taking branches from mains
Looping main around beam
Looping dry return main around door
To find C—multiply A by
constant for angle B
NOTE:
Indicates direction of pitch
in piping connections
Method of reducing size of mains
