Zoning & Circulation

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Learn More About Caleffi 521509AC
Caleffi MixingCal 3-Way Thermostatic Mixing Valve w/ checks, 3/4" Sweat Connections, 3 Cv
$176.47
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Learn More About Caleffi 521609AC
Caleffi MixingCal 3-Way Thermostatic Mixing Valve w/ checks, 1" Sweat Connections, 3 Cv
$204.41
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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.
Learn More About Caleffi 521400A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1/2" NPT Connections, 3 Cv
$153.68
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Learn More About Caleffi 521500A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass 3/4" NPT Connections, 3 Cv
$160.29
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Learn More About Caleffi 521600A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1" NPT Connections, 3 Cv
$190.44
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Learn More About Caleffi 521600AC
Caleffi MixingCal 3-Way Thermostatic Mixing Valve w/ checks, 1" NPT Connections, 3 Cv
$211.76
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Free Shipping
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Free Shipping
*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.
Learn More About Caleffi 521519A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass with Adaptor and Temperature Gauge, 3/4" Sweat Connections
$180.88
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Learn More About Caleffi 521519AC
Caleffi MixingCal 3-Way Thermo Mixing Valve w/ checks, Low-Lead Brass w/ Adaptor and Temperature Gauge, 3/4" Sweat Connections
$202.94
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Free Shipping
*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.
Learn More About Caleffi 521619A
Caleffi MixingCal 3-Way Thermostatic Mixing Valve, Low-Lead Brass with Adaptor and Temperature Gauge, 1" Sweat Connections
$211.03
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Free Shipping
Learn More About Free Freight
Free Shipping
*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.
Learn More About Caleffi 521342A
Caleffi Scald Protection 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1/2" NPT Connections, 2 Cv
$108.12
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Learn More About Caleffi 521362A
Caleffi Scald Protection 3-Way Thermostatic Mixing Valve, Low-Lead Brass 1" NPT Connections, 2 Cv
$169.12
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Learn More About Caleffi 280175A
Caleffi ThermoMix High-Flow Boiler Protection Thermostatic Mixing Valve, Cartridge Sensor, 1-1/4" NPT Connections, 130 F Max, 14 Cv
$287.50
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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.
Learn More About Caleffi 132432A
Caleffi QuickSetter Balancing Valve with Flow Meter, 1/2" NPT, 0.5-1.75 GPM
$154.41
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Learn More About Caleffi 132552A
Caleffi QuickSetter Balancing Valve with Flow Meter, 3/4" NPT, 2 - 7 GPM
$166.18
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Learn More About Caleffi 132662A
Caleffi QuickSetter Balancing Valve with Flow Meter, 1" NPT, 3 - 10 GPM
$194.12
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Learn More About Caleffi 132772A
Caleffi QuickSetter Balancing Valve with Flow Meter, 1-1/4" NPT, 5 - 19 GPM
$258.09
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Free Shipping
*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.
Learn More About Caleffi 132882A
Caleffi QuickSetter Balancing Valve with Flow Meter, 1-1/2" NPT, 8 - 32 GPM
$305.88
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Free Shipping
*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.
Learn More About Caleffi 132992A
Caleffi QuickSetter Balancing Valve with Flow Meter, 2" NPT, 12 - 50 GPM
$374.26
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Free Shipping
Learn More About Free Freight
Free Shipping
*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.
Learn More About Caleffi 59817A
Caleffi Tail Piece, 1" NPT Male Connection with 1" Nut, Low-Lead Brass
$24.19
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Learn More About Caleffi 675900A
Caleffi Snap-on Thermometer, mounted directly on 3/8", 1/2" & 5/8" PEX or PEX-AL-PEX Piping
$7.94
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Learn More About Caleffi 676269A
Caleffi 2-Way Thermo-electric Zone Valve, 1" Sweat TwisTop Connections, 24V with AUX Switch, NC
$166.18
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Learn More About Caleffi 680555A
Caleffi 5/8" Nominal Universal PEX Fittings, ASTM Pipe Size
$7.50
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Learn More About Caleffi 280975A
Caleffi ThermoMix High-Flow Boiler Protection Thermostatic Mixing Valve, Cartridge Sensor, 1-1/4" Sweat Connections, 135 F Max, 14 Cv
$275.74
Factory-Direct
Free Shipping
Learn More About Free Freight
Free Shipping
*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.
Learn More About Caleffi 681503A
Caleffi - Series 681 - Universal PEX Fitting - 3/8" Nominal PEX Connection - 150 PSI Maximum Pressure
$7.79
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Proper circulation is extremely important for a boiler system. Make sure your boiler system is running at its best with top-of-the-line zoning & circulation accessories. Shop our wide selection and let our experts help you today.