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®
HOT WATER SUPPLY AND RETURN HEADERS
PARTS LIST AND ASSEMBLY INSTRUCTIONS
L-Series: Oil-fired Modular Boilers
Header Parts List
43-2572
43-2573
Item Part No. 234 56 78910
1-1/2" Stub Header - 2 stub - 27" C-C (pkgd. separately) 43-0920 2–4 2– 42–4
1-1/2" Stub Header - 3 stub - 27" C-C (pkgd. separately) 43-0921 –2–24 2464
Flex Joint - 1-1/2" pipe 43-2023 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 4" 43-0904 346 7810 11 12 14
Nipple - 1-1/2" x 15" 43-0923 234 56 78910
Nipple - 1-1/2" x 30" 43-0924 112 24 4566
Nipple - 1-1/2" x close 43-0927 234 56 78910
Square Nipple - 1-1/2" x 8" T.O.E. 43-0925 122 34 4566
Square Nipple - 1-1/2" x 34" T.O.E. 43-0926 122 46 5666
Union - 1-1/2" 902428071 224 44 6668
Tee - 1-1/2" 43-0917 234 56 78910
Bushing - 1-1/2" x 3/4" 902179321 23456 78910
Elbow - 1-1/2" 902454071 46810 12 14 16 18 20
Installation Instructions 43-0901 111 11 1111
Header Package Order Code
Number of Modules
Part No. 43-0901
Publication CH-40L
Printed in U.S.A. 906
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FACTORY SUPPLY AND RETURN HEADER ASSEMBLY — OIL
1
1
/2'' X 8'' SQUARE NIPPLE
3'' RETURN HEADER
1
WITH 1
/2'' STUBS
(3 MODULE)
1
/2'' FLEX JOINT
1
(SEE DETAIL "A")
3'' FLEX JOINTS
(SEE DETAIL "A")
3'' RETURN HEADER
1
WITH 1
/2'' STUBS
(2 MODULE)
CAST END CAP
1
1
/2'' X 4'' NIPPLE
*Building piping must be rigidly secured so it cannot
move where connected to headers.
1
1
1
/2'' X 15'' NIPPLE
1
/2'' ELBOW
3'' FLEX JOINT
(SEE DETAIL "A")
3'' PIPE X 20''
(BY OTHERS)
1
1
/2'' UNION
1
/2'' PRESSURE
TEMPERATURE
GAUGE
3'' SUPPLY HEADER
1
WITH 1
/2'' STUBS
(2 MODULE)
1
/2'' X 11/2'' X 11/2'' TEE
1
*3'' BUILDIING PIPE
1
/2'' WELLS
CONTROL HEADER
1
/2'' x 1/2'' x 1/2''
3'' x
CONNECTION
* 3'' BUILDING
PIPING
(BY OTHERS)
1
1
/2'' X 34'' SQUARE NIPPLE
1
/2'' X 30'' NIPPLE
1
CAST END CAP
3
WITH
/4'' TAPPING.
SUPPLY OR RETURN.
FOR USE WITH LWCO.
1
1
/2'' X 4'' NIPPLE
3'' SUPPLY HEADER
1
WITH 1
/2'' STUBS
(3 MODULE)
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.
1
/2'' ELBOW
1
3
1
/2'' X CLOSE NIPPLE
1
/4'' DRAIN VALVE
1
/2'' X 3/4'' BUSHING
1
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Caravan Flex Joint Assembly Instructions
1. Slip the metal retainer on the system piping with the larger
diameter side facing the end of the pipe to be joined. The
3" flex joint has a single piece serrated metal retaining
ring. This retaining ring should be seated in the recess in
the inner diameter of the gasket with its mounting tabs
overlapping slightly where the ring splits. The 1-1/2" flex
joint has a 2 piece serrated retaining ring that must be
installed in the inner recess of the gasket with its ends
butting.
Work the gasket with the serrated metal retaining ring onto the pipe. When installing the gasket be sure the retaining rings seat
properly around the pipe. On the 1-1/2" flex joint install the bottom half of the gasket first leaving the other half of the retaining ring
free at the top. Then stretch the top of the gasket with the ring over the top of the pipe. When installing the gaskets if a lubricant
is needed, use a soap and water solution only. DO NOT use any oil based lubricants.
2. The gasket must be fully seated in the metal retainer (press together with pliers if necessary). BE SURE THE GASKET IS
SEATED ON AN UNTHREADED SECTION OF PIPE AT LEAST 1" FROM THE END. Slip the flared end of the Slant/Fin
header tube over the pipe and seat against the gasket. Follow illustration a or b for cast end cap or piping.
a) b)
3. Open hinged metal clamp and slip over joint. Be sure that the flared end of the steel tubing, the retainer ring and the gasket
are enclosed within the clamp.
4. Install the bolt and lock nut and tighten the lock nut to
the following torque values: 1-1/2" flex joint is 140-160
inch-pounds, 3" flex joint is 220-240 inch-pounds.
NOTE: On 3” schedule 40 pipe, spacing between clamps is
approximately 3/8” when properly torqued.
On 1-1/2" schedule 40 pipe, spacing between clamps
is approximately 1/4" when properly torqued.
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SLANT/FIN CORPORATION, Greenvale, N.Y. 11548 • Phone: (516) 484-2600
FAX: (516) 484-5921 • Canada: Slant/Fin LTD/LTEE, Mississauga, Ontario
www.slantfin.com
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