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

16% Buy This
$9.65
In-Stock
Caleffi Thermostatic Control Head with Built-in Sensor, 45-82 F Temperature Range, used with radiator valves
12% Buy This
$31.25
In-Stock
Caleffi Series 681 Universal PEX Fitting, 1/2" Nominal PEX Connection, 150 psi max - QTY:1
11% Buy This
$11.10
In-Stock

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

7% Buy This
$5.85
In-Stock
Caleffi AutoFIll Combo Automatic Boiler Fill Valve with Backflow Preventer, Pressure Indicator, 1/2" FNPT Inlet x 1/2" NPT Female Outlet
6% Buy This
$99.60
In-Stock
Caleffi Automatic Air Vent with Service Check Valve, 1/8" NPT Male
$9.25
Only 1 In-Stock
Caleffi 1/2" Nominal Universal PEX Fittings, ASTM Pipe Size
$4.95
Was 
$9.95
SAVE $5.00
Factory-Direct
Caleffi Two-pipe Angled Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
4% Buy This
$23.25
In-Stock
Caleffi 1/2" Hard Copper Compression Fittings, 1/2" Compression Connections, 150 psi max
$9.35
In-Stock
Caleffi DirtMag Dirt Separator with Magnet, 1" NPT Female Connections, top thread on top
3% Buy This
$116.10
Only 1 In-Stock
Caleffi Two-pipe Straight Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
3% Buy This
$23.25
In-Stock
Caleffi 3/4" Nominal Universal PEX Fittings, ASTM Pipe Size
$4.90
Was 
$9.90
SAVE $5.00
In-Stock
Caleffi Replacement Boiler Drain Valve, 1/2" NPT x 3/4" Garden Hose Thread
$8.00
Factory-Direct

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

2% Buy This
$6.20
Only 5 In-Stock
Caleffi One-pipe Straight Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
2% Buy This
$43.95
Only 5 In-Stock
Caleffi Series 682 Universal PEX-AL-PEX Fittings, 1/2" PEX-AL-PEX Connections, 150 psi max
$4.95
In-Stock
Caleffi 5/8" Nominal Universal PEX Fittings, ASTM Pipe Size
$5.10
Factory-Direct
Caleffi Boiler Trim Kit, 1" NPT Connections w/ BackFlow Preventer & 4.4 gal Expansion Tank
1% Buy This
$306.40
Only 4 In-Stock
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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.
Caleffi Discal Air Separator with 1/2" FNPT Bottom Thread, 1" NPT Female Connections
$103.30
Only 3 In-Stock
Caleffi Replacement Boiler Drain Valve, 1/4" NPT x 3/4" Garden Hose Thread
$7.85
Was 
$12.85
SAVE $5.00
Factory-Direct
Caleffi Z-One 24V Normally Closed Valve Actuator with AUX Switch, 18" Wire
$52.20
Only 1 In-Stock
Caleffi One-pipe Angled Panel Radiators Valve, 1/2" Straight (Radiator) x 3/4" Conical (Pipe)
1% Buy This
$43.95
Only 1 In-Stock
Caleffi DirtMag Dirt Separator with Magnet, 1-1/4" Sweat Connections, top thread on top
1% Buy This
$161.45
Only 1 In-Stock