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One of the biggest names in hydronics, Caleffi has all the parts to optimize your boiler's performance. We carry a full line of Caleffi heating products, so start shopping below or call us for expert advice!
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Model Number NA553662 is a Hot Seller
Learn More About NA553662
Caleffi Boiler Trim Kit, 1" NPT Connections w/BackFlow Preventer & 7.6 gal Expansion Tank
Model: NA553662
Caleffi Boiler Trim Kit, 1" NPT Connections w/BackFlow Preventer & 7.6 gal Expansion Tank
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Model NA553662 is a Closeout
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$305.75
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$355.75
SAVE $50.00
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Learn More About Free Freight *This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
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Model Number 940451 is the Number 1 Seller
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Caleffi Series 940 - Radiator Adapter - 1/2" x 3/4" Connections - QTY: 2
Model: 940451

Caleffi - Series 940 - Radiator Adapter - 1/2" M Straight x 3/4" M Conical Connection, Package of 2

28% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
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$9.65
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Model Number 681524 is the Number 2 Seller
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Caleffi Series 681 Universal PEX Fitting, 1/2" Nominal PEX Connection, 150 psi max - QTY:2
Model: 681524
Caleffi Series 681 Universal PEX Fitting, 1/2" Nominal PEX Connection, 150 psi max - QTY:1
11% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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$11.10
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Model Number NA10313 is the Number 3 Seller
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Caleffi Series NA103 - Connection Fitting - 1/2" NPT Male Connection
Model: NA10313

Caleffi - Series NA103 - Connection Fitting - 1/2" NPT Male Connection - 150 PSI Maximum Pressure

11% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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$6.20
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Model Number 200000 is the Number 4 Seller
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Caleffi Thermostatic Control Head with Built-in Sensor, 45-82 F Temperature Range, used with radiator valves
Model: 200000
Caleffi Thermostatic Control Head with Built-in Sensor, 45-82 F Temperature Range, used with radiator valves
8% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
Q&A (2)
$31.25
In-Stock
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Model Number NA10262 is the Number 5 Seller
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Caleffi 1/2" Sweat Connection Fitting, chrome plated nut
Model: NA10262

Caleffi 1/2" Sweat Connection Fitting, chrome plated nut

6% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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$5.85
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Learn More About 680504A
Caleffi 1/2" Nominal Universal PEX Fittings, ASTM Pipe Size
Model: 680504A
Caleffi 1/2" Nominal Universal PEX Fittings, ASTM Pipe Size
6% Buy This
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$4.95
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$9.95
SAVE $5.00
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Learn More About 301040
Caleffi Two-pipe Straight Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
Model: 301040
Caleffi Two-pipe Straight Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
4% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
Q&A (1)
$23.25
In-Stock
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Learn More About 437516
Caleffi 1/2" Hard Copper Compression Fittings, 1/2" Compression Connections, 150 psi max QTY: 2
Model: 437516
Caleffi 1/2" Hard Copper Compression Fittings, 1/2" Compression Connections, 150 psi max
3% Buy This
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$9.35
Only 4 In-Stock
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Learn More About 301140
Caleffi Two-pipe Angled Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
Model: 301140
Caleffi Two-pipe Angled Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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$23.25
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Learn More About 250041A
Caleffi Solar Systems Automatic Air Vent, 1/2" NPT Connection
Model: 250041A
Caleffi Solar Systems Automatic Air Vent, 1/2" NPT Connection
2% Buy This
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$32.40
Only 1 In-Stock
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Learn More About 220400A
Caleffi Angled Radiator Valve Body, 1/2" NPT Connections, 40-212 F, 2.7 Cv
Model: 220400A
Caleffi Angled Radiator Valve Body, 1/2" NPT Connections, 40-212 F, 2.7 Cv
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
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$30.70
Only 2 In-Stock
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Learn More About 120159A
Caleffi FlowCal Y-Strainer with Integral Ball Valve, 3/4" Sweat Connections
Model: 120159A
Caleffi FlowCal Y-Strainer with Integral Ball Valve, 3/4" Sweat Connections
1% Buy This
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$66.65
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Learn More About 253044
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 60 PSI
Model: 253044
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 60 PSI
1% Buy This
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$32.25
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Learn More About 253048
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 120 PSI
Model: 253048
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 120 PSI
1% Buy This
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$32.25
Only 1 In-Stock
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Learn More About 502710A
Caleffi Automatic Air Vent with Service Check Valve, 1/8" NPT Male
Model: 502710A
Caleffi Automatic Air Vent with Service Check Valve, 1/8" NPT Male
1% Buy This
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$9.25
Only 2 In-Stock
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Learn More About NA553362
Caleffi Boiler Trim Kit, 1" NPT Connections w/ BackFlow Preventer & 4.4 gal Expansion Tank
Model: NA553362
Caleffi Boiler Trim Kit, 1" NPT Connections w/ BackFlow Preventer & 4.4 gal Expansion Tank
1% Buy This
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$306.40
Only 4 In-Stock
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Free Shipping
Learn More About Free Freight *This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
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Learn More About 253046
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 90 PSI
Model: 253046
Caleffi Solar Systems Safety Relief Valve, 1/2" FNPT Inlet x 3/4" FNPT Discharge, Factory set to 90 PSI
1% Buy This
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$32.25
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Learn More About 521409A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1/2" Sweat Connections, 3 Cv
Model: 521409A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1/2" Sweat Connections, 3 Cv
1% Buy This
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$88.90
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Learn More About 626600A
Caleffi 1" NPT Male Universal Flow Switch with NEMA 5 Enclosure, Suitable for 1" to 8" Pipe
Model: 626600A
Caleffi 1" NPT Male Universal Flow Switch with NEMA 5 Enclosure, Suitable for 1" to 8" Pipe, used with heating & air conditioning systems
1% Buy This
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$124.95
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Learn More About 682540A
Caleffi Series 682 Universal PEX-AL-PEX Fittings, 1/2" PEX-AL-PEX Connections, 150 psi max
Model: 682540A
Caleffi Series 682 Universal PEX-AL-PEX Fittings, 1/2" PEX-AL-PEX Connections, 150 psi max
1% Buy This
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$4.95
In-Stock
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Learn More About Z111000
Caleffi Z-One 24V Normally Closed Valve Actuator with AUX Switch, 18" Wire
Model: Z111000
Caleffi Z-One 24V Normally Closed Valve Actuator with AUX Switch, 18" Wire
1% Buy This
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$52.20
Only 3 In-Stock
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Learn More About Z200043
Caleffi Z-One 2-Way Straight Inverted Flare Valve Body, 30 PSI, 3.5 Cv
Model: Z200043
Caleffi Z-One 2-Way Straight Inverted Flare Valve Body, 30 PSI, 3.5 Cv
1% Buy This
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$23.30
Factory-Direct
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Learn More About 680505A
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
Model: 680505A
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
1% Buy This
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$4.90
Was 
$9.90
SAVE $5.00
Only 2 In-Stock
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