®
HOT WATER SUPPLY AND RETURN HEADERS
PARTS LIST AND ASSEMBLY INSTRUCTIONS
G-Series: Gas-Fired Modular Boilers
Header Parts List
41-2042
41-2043
Item Part No. 234 56 78910
1-1/2" Stub Header - 2 stub - 32" C-C (pkgd. separately) 41-2021 2–4 2– 42–4
1-1/2" Stub Header - 3 stub - 32" C-C (pkgd. separately) 41-2022 –2–24 2464
Flex Joint - 1-1/2" pipe 41-2023 244 68 810 12 12
Flex Joint - 3" pipe 41-1755 448 8812 12 12 16
Cast End Cap - 3/4" NPT 41-1780 111 11 1111
Cast End Cap - No tap 41-1753 111 11 1111
Nipple - 1-1/2" x 8" 41-2024 346 7810 11 12 14
Nipple - 1-1/2" x 18" 41-2025 112 22 3334
Nipple - 1-1/2" x 4" 43-0904 234 56 78910
Square Nipple - 1-1/2" x 10" T.O.E. 41-2027 122 34 4566
Square Nipple - 1-1/2" x 20" T.O.E. 41-2028 12234 4566
Union - 1-1/2" 90-2428071 224 44 6666
Tee - 1-1/2" 43-0917 46810 12 14 16 18 20
Bushing - 1-1/2" x 1/4" 41-2036 23456 78910
Bushing - 1-1/2" x 3/4" 90-2179321 234 56 78910
Installation Instructions 41-1775 111 11 1111
Header Package Order Code
Number of Modules
Part No. 41-1775
Publication CH-40G
Printed in U.S.A. 807
FACTORY SUPPLY AND RETURN HEADER ASSEMBLY — GAS
CAST END CAP
SUPPLY HEADER
WITH THREE 1-1/2” STUBS
1-1/2” UNION
1-1/2” FLEX JOINT
(SEE DETAI L “A”)
3” FLEX JOINTS
(SEE DETAI L “A”)
1-1/2” NIPPLE 8”
3” PIPE x 28”
TYPICAL
(BY OTHERS)
3” FLEX JOINT
(SEE DETAI L “A)
SUPPLY HEADER
WITH TWO
1-1/2” STUBS
1/2” TRIDIC ATOR
GAUGE
CONTROL HEADER
3” x 1/2” x 1/2” x 1/2”
3” BUILDING PIPING
CONNECTION
1/2” WELLS
1-1/2” SQUARE NIPPLE x 10”
1-1/2” T EE
1-1/2” x 1/4” BUSHING
TRIDICAT OR
1-1/2” NIPPLE x 4”
CAST END CAP
WITH 3/4” TAPPING
RETURN HEADER
WITH TWO 1-1/2” S TUBS
1-1/2” SQUARE NIPPLE x
1-1/2” x 3/4” BUSHING
1-1/2” NIPPLE x 8”
* 3” BUILDING PIPING
(BY OTHERS)
32” T Y P.
1-1/2” NIPPLE x 18”
3/4” DRAIN VALVE
(BY OTHERS)
RETURN HEADER
WITH THREE 1-1/2” STUBS
• Building piping must be rigidly
secured so it cannot move
where connected to headers.
NOTE:
Shown reverse return. For direct
return, header assembly piping
connections may be made at the
same end of the boiler bank, not
as shown.
Complete header assembly kit shown for 3 modules.
Some governing agencies do not
allow compression type couplings.
Consult your local code
requirements.