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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
Caleffi Molded Cable for connecting Grundfos VFS & RPS to WMZ-G1 Terminal Block, 10'
Model NA15030 is a Closeout
Closeout
$10.80
Was 
$15.80
SAVE $5.00
Only 2 In-Stock
Model Number 437516-2 is a Recently Added Product
Caleffi 1/2" Hard Copper Compression Fittings, 1/2" Compression Connections, 150 psi max
$9.80
Factory-Direct
Model Number 502243A is the Number 1 Seller
Caleffi Replacement High Capacity Air Vent, 1/2" NPT Male Connections, used with HydroLink Separators
15% Buy This
$18.00
Only 1 In-Stock
Model Number 200000 is the Number 2 Seller
Caleffi Thermostatic Control Head with Built-in Sensor, 45-82 F Temperature Range, used with radiator valves
13% Buy This
$33.49
In-Stock
Model Number 940451 is the Number 3 Seller

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

11% Buy This
$10.49
In-Stock
Model Number NA10313 is the Number 4 Seller

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

6% Buy This
$6.80
In-Stock
Model Number 573002A is the Number 5 Seller
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
$105.00
In-Stock
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
4% Buy This
$5.40
In-Stock
Caleffi Two-pipe Angled Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
3% Buy This
$26.00
In-Stock
Caleffi Two-pipe Straight Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
3% Buy This
$27.00
In-Stock
Caleffi Series 682 Universal PEX-AL-PEX Fittings, 1/2" PEX-AL-PEX Connections, 150 psi max
3% Buy This
$4.95
Factory-Direct
Caleffi 1" Sweat Adapter x 1-1/4" Union Thread Connection Sweat Adapter Fitting
3% Buy This
$15.45
In-Stock
Caleffi Angled Isolation & Balancing Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe), 4.6 Cv
2% Buy This
$21.25
Only 1 In-Stock
Caleffi 1/8" MNPT Service Check Valve, no purging system required
2% Buy This
$6.50
Factory-Direct
Caleffi Dual Check Continuous Pressure Backflow Preventer with Atmospheric Vent, 1/2" Sweat Inlet/Outlet
2% Buy This
$43.15
Only 5 In-Stock
Caleffi QuickSetter Balancing Valve with Flow Meter, 3/4" NPT, 2 - 7 GPM
2% Buy This
$109.70
Only 3 In-Stock
Caleffi DirtMag Dirt Separator with Magnet, 1" NPT Female Connections, top thread on top
2% Buy This
$122.00
Factory-Direct
Caleffi Z-One 24V Normally Closed Valve Actuator without AUX Switch, 18" Wire
2% Buy This
$48.40
Factory-Direct
Caleffi Z-One 2-Way Straight Sweat Valve Body, 1/2" Connections, 50 PSI, 2.5 Cv
2% Buy This
$21.35
Only 4 In-Stock
Caleffi Replacement Shut-off Valve for 663 Series Manifold Assembly
1% Buy This
$6.65
Factory-Direct
Caleffi Straight Radiator Valve Body, 1/2" Straight (Radiator) x 3/4" Conical (Pipe), 2 Cv
1% Buy This
$34.80
Factory-Direct
Caleffi Discal Air Separator with 1/2" Check Valve, 1-1/4" NPT Female Connections
1% Buy This
$154.40
Factory-Direct
Caleffi DirtMag Dirt Separator with Magnet, 1-1/4" Female NPT Connections, top thread on top
1% Buy This
$169.50
Only 2 In-Stock
Caleffi Boiler Trim Kit, 1" NPT Connections w/ BackFlow Preventer & 4.4 gal Expansion Tank
1% Buy This
$306.40
Factory-Direct
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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.