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NOTE:
Shown reverse return (Preferred). For direct return, header assembly piping
connections may be made at the same end of the boiler bank, not as shown.
Some governing agencies do not allow compression type couplings.
Consult your local code requirements.
3'' PIPE X 20''
(BY OTHERS)
1
1
/
2
'' UNION
1
1
/
2
'' X 1
1
/
2
'' X 1
1
/
2
'' TEE
1
1
/
2
'' X
3
/
4
'' BUSHING
3
/
4
'' DRAIN VALVE
1
1
/
2
'' X CLOSE NIPPLE
1
1
/
2
'' ELBOW
3'' SUPPLY HEADER
WITH 1
1
/
2
'' STUBS
(2 MODULE)
*3'' BUILDIING PIPE
CONNECTION
1
/
2
'' PRESSURE
TEMPERATURE
GAUGE
1
/
2
'' WELLS
3'' FLEX JOINT
(SEE DETAIL "A")
1 ELBOW
1
CONTROL HEADER
3'' x
1
/
2
'' x
1
/
2
'' x
1
/
2
''
*Building piping must be rigidly secured so
i
t cannot move where connected to
headers.