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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 NA15030 is a Hot Seller
Learn More About Caleffi NA15030
Caleffi Molded Cable for connecting Grundfos VFS & RPS to WMZ-G1 Terminal Block, 10'
Model: NA15030
Caleffi Molded Cable for connecting Grundfos VFS & RPS to WMZ-G1 Terminal Block, 10'
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Model NA15030 is a Closeout
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$10.80
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$15.80
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Model Number NA10313 is the Number 1 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

21% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$6.80
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Model Number 940451 is the Number 2 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

13% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$10.49
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Model Number 200000 is the Number 3 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
10% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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$33.49
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Model Number 502243A is the Number 4 Seller
Learn More About Caleffi 502243A
Caleffi Replacement High Capacity Air Vent, 1/2" NPT Male Connections, used with HydroLink Separators
Model: 502243A
Caleffi Replacement High Capacity Air Vent, 1/2" NPT Male Connections, used with HydroLink Separators
8% Buy This
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$18.00
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Model Number 573002A is the Number 5 Seller
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Caleffi Auto Fill Combo Automatic Boiler Fill Valve with Backflow Preventer, 1/2" FNPT Inlet x 1/2" FNPT Outlet
Model: 573002A
Caleffi AutoFIll Combo Automatic Boiler Fill Valve with Backflow Preventer, Pressure Indicator, 1/2" FNPT Inlet x 1/2" NPT Female Outlet
4% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$105.00
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Learn More About Caleffi 573409A
Caleffi Dual Check Continuous Pressure Backflow Preventer with Atmospheric Vent, 1/2" Sweat Inlet/Outlet
Model: 573409A
Caleffi Dual Check Continuous Pressure Backflow Preventer with Atmospheric Vent, 1/2" Sweat Inlet/Outlet
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$43.15
Only 3 In-Stock
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Learn More About Caleffi 681524
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
3% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$11.10
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Learn More About Caleffi 551035A
Caleffi Discal Air Separator with 1/2" FNPT Bottom Thread, 1-1/4" Sweat Connections
Model: 551035A
Caleffi Discal Air Separator with 1/2" FNPT Bottom Thread, 1-1/4" Sweat Connections
3% Buy This
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Q&A (1)
$143.65
Only 1 In-Stock
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Learn More About Caleffi 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
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$4.95
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Learn More About Caleffi 680505A
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
Model: 680505A
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
2% Buy This
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$5.40
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Learn More About Caleffi 449740
Caleffi Wall Covering Plate, used with 301 series dual panel radiator valves
Model: 449740
Caleffi Wall Covering Plate, used with 301 series dual panel radiator valves
2% Buy This
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$2.25
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Learn More About Caleffi NA10262
Caleffi 1/2" Sweat Connection Fitting, chrome plated nut
Model: NA10262

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

1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$6.75
Only 4 In-Stock
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Learn More About Caleffi 680504A
Caleffi 1/2" Nominal Universal PEX Fittings, ASTM Pipe Size
Model: 680504A
Caleffi 1/2" Nominal Universal PEX Fittings, ASTM Pipe Size
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$5.40
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Learn More About Caleffi 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)
1% Buy This
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Q&A (1)
$27.00
Only 5 In-Stock
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Learn More About Caleffi 546306A
Caleffi DirtMag Dirt Separator with Magnet, 1" NPT Female Connections, top thread on top
Model: 546306A
Caleffi DirtMag Dirt Separator with Magnet, 1" NPT Female Connections, top thread on top
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$122.00
Only 4 In-Stock
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Learn More About Caleffi 59474A
Caleffi 1/8" MNPT Service Check Valve, no purging system required
Model: 59474A
Caleffi 1/8" MNPT Service Check Valve, no purging system required
1% Buy This
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$6.50
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Learn More About Caleffi 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
1% Buy This
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$9.35
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Learn More About Caleffi 69122 CST
Caleffi Replacement Shut-off Valve for 663 Series Manifold Assembly
Model: 69122 CST
Caleffi Replacement Shut-off Valve for 663 Series Manifold Assembly
1% Buy This
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$6.65
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Learn More About Caleffi 386500
Caleffi 3/4" Manifold Outlet Cap, 3/4" Straight Thread
Model: 386500
Caleffi 3/4" Manifold Outlet Cap, 3/4" Straight Thread
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$5.10
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Learn More About Caleffi Z121000
Caleffi Z-One 24V Normally Closed Valve Actuator without AUX Switch, 18" Wire
Model: Z121000
Caleffi Z-One 24V Normally Closed Valve Actuator without AUX Switch, 18" Wire
1% Buy This
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$48.40
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Learn More About Caleffi 343452
Caleffi Straight Isolation & Balancing Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe), 2.5 Cv
Model: 343452
Caleffi Straight Isolation & Balancing Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe), 2.5 Cv
1% Buy This
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$22.30
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Learn More About Caleffi 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
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(1)
$306.40
Only 1 In-Stock
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*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 Caleffi 132552A
Caleffi QuickSetter Balancing Valve with Flow Meter, 3/4" NPT, 2 - 7 GPM
Model: 132552A
Caleffi QuickSetter Balancing Valve with Flow Meter, 3/4" NPT, 2 - 7 GPM
1% Buy This
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$109.70
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