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Caleffi

Founded in 1956 in Italy, Caleffi is a global leader in hydronic heating, plumbing, and air conditioning components. From thermostatic mixing valves and pressure reducing valves to air separators and zone valves, Caleffi engineers for precision, efficiency, and reliability.
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1805 products

Brass low lead check valve with 3/4" sweat connections and white manufacturer label.

Caleffi NA51259 Serviceable low lead check 3/4" sweat

SKU #: CALENA51259   |   MPN #: NA51259
$75.95
$75.95 $0.00
MSRP: $86.70

Available in stock

Brass automatic air vent with magnetic dirt separator, 1-1/4 inch sweat connection fitting.

Caleffi 546335AM DirtMagPRO 1-1/4" sweat

SKU #: CALE546335AM   |   MPN #: 546335AM
$283.11
$283.11 $0.00
MSRP: $390

Available in stock

Brass water filter with blue Caleffi label, black band, yellow warning symbol, and red shutoff valve at bottom.

Caleffi 546341AM DirtMagPRO 1-1/2" sweat

SKU #: CALE546341AM   |   MPN #: 546341AM
$365.10
$365.10 $0.00
MSRP: $508

Available in stock

Brass DirtMagPRO separator with copper press connections, blue Caleffi label, black base band, red ball valve, and drain port

Caleffi 546366AM DirtMagPRO 1" press

SKU #: CALE546366AM   |   MPN #: 546366AM
$227.50
$227.50 $0.00
MSRP: $306

Available in stock

Brass air separator with blue DISCAL CALEFFI label, side ports, and threaded top connection fitting.

Caleffi 551007AC DISCAL Air Separator 1 1/4"" NPT w/ Expansion Tank Check

SKU #: CALE551007AC   |   MPN #: 551007AC
$222.38
$222.38 $0.00
MSRP: $329

Available in stock

Brass 3-way mixing valve with black adjustment knob, copper press fittings on inlet and outlet ports, labeled MIN and MAX.

Caleffi 521506A MixCal 3-way Mixing Valve 3/4" Press

SKU #: CALE521506A   |   MPN #: 521506A
$200.18
$200.18 $0.00
MSRP: $259

Available in stock

Brass 3-way mixing valve with black adjustment knob and attached temperature gauge showing MIN-MAX settings.

Caleffi 521516A MixCal 3-way Mixing Valve 3/4" Press w/ Temp Gauge

SKU #: CALE521516A   |   MPN #: 521516A
$233.72
$233.72 $0.00
MSRP: $304

Available in stock

Brass 3-way mixing valve with 3/4" ports and temperature probe attachment.

Caleffi 520519A AngleMix 3- Way Mixing valve 3/4" SWTw/probe

SKU #: CALE520519A   |   MPN #: 520519A
$224.45
$224.45 $0.00
MSRP: $291

Available in stock

Brass drain cock with white plastic cap and black grip ring, 1/4" NPT connection.

Caleffi 337221A 1/4" NPT Drain Cock w/Metal Seal

SKU #: CALE337221A   |   MPN #: 337221A
$15.67
$15.67 $0.00
MSRP: $15.67

Available in stock

Brass pressure relief valve with white and black regulator body, attached pressure gauge, and 3/4" sweat connections.

Caleffi 535951HA PressCal PRV ASSE 1003, 3/4" Sweat w/ Pressure Gauge

SKU #: CALE535951HA   |   MPN #: 535951HA
$129.47
$129.47 $0.00
MSRP: $161

Available in stock

Caleffi solar air vent with 1/2" NPT threaded connections, cylindrical metal body with ridged cap and vent valve on top.

Caleffi 251004A High Capacity Solar Air Vent 1/2" NPT

SKU #: CALE251004A   |   MPN #: 251004A
$138.13
$138.13 $0.00
MSRP: $168

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass straight lockshield valve with white cap, 1/2" and 3/4" connections, and adjustment nut.

Caleffi 343452 Straight Lockshield 1/2" X 3/4"

SKU #: CALE343452   |   MPN #: 343452
$45.94
$45.94 $0.00
MSRP: $50.70

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass elbow lockshield valve with gray cap and detached fitting connector showing male threads on both ends.

Caleffi 342452 Elbow Lockshield 1/2"M x 3/4"M

SKU #: CALE342452   |   MPN #: 342452
$43.85
$43.85 $0.00
MSRP: $48.30

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass 3-way mixing valve with dial thermometer gauge and black actuator knob.

Caleffi 520516A AngleMix 3- Way Mixing valve 3/4" Press Temp Probe

SKU #: CALE520516A   |   MPN #: 520516A
$233.72
$233.72 $0.00
MSRP: $304

Available in stock

Brass boiler trim kit with gray expansion tank, pressure relief valve, and backflow preventer assembly.

Caleffi NA553369 Boiler Trim Kit, 1" Sweat, 4.4Gal with ASSE 1012 Back Flow

SKU #: CALENA553369   |   MPN #: NA553369
$504.88
$504.88 $0.00
MSRP: $684

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass boiler trim kit with pressure relief valve, expansion tank, and gauges mounted on gray cylindrical tank.

Caleffi NA553366 Boiler Trim Kit, 1" Press, 4.4Gal with ASSE 1012 Back Flow

SKU #: CALENA553366   |   MPN #: NA553366
$549.59
$549.59 $0.00
MSRP: $750

Special Order. Expect 4-6 weeks for delivery, subject to change

Boiler trim kit with gray expansion tank, brass valves, copper fittings, and connectors for 1" NPT applications.

Caleffi NA553362 Boiler Trim Kit, 1" NPT, 4.4Gal with ASSE 1012 Back Flow

SKU #: CALENA553362   |   MPN #: NA553362
$515.78
$515.78 $0.00
MSRP: $700

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass boiler trim kit with gray expansion tank, backflow preventer, gauges, and multiple valve connections.

Caleffi NA553362R Boiler Trim Kit, 1" NPT, 4.4Gal with ASSE 1013 Back Flow

SKU #: CALENA553362R   |   MPN #: NA553362R
$795.09
$795.09 $0.00
MSRP: $1,113

Special Order. Expect 4-6 weeks for delivery, subject to change

Caleffi boiler trim kit with gray expansion tank, brass valves, gauges, and backflow preventer assembly.

Caleffi NA553366R Boiler Trim Kit, 1" Press, 4.4Gal with ASSE 1013 Back Flow

SKU #: CALENA553366R   |   MPN #: NA553366R
$831.61
$831.61 $0.00
MSRP: $1,167

Special Order. Expect 4-6 weeks for delivery, subject to change

Brass boiler trim kit with gray expansion tank, pressure relief valve, and backflow preventer assembly.

Caleffi NA553376 Boiler Trim Kit, 1 1/4" Press, 4.4Gal with ASSE 1012 Back Flow

SKU #: CALENA553376   |   MPN #: NA553376
$652.39
$652.39 $0.00
MSRP: $902

Special Order. Expect 4-6 weeks for delivery, subject to change

Caleffi FAQ

What is Caleffi?

Caleffi is a manufacturer of hydronic heating and plumbing components, known for high-quality valves, fittings, and system solutions designed for efficiency and reliability.

What products does Caleffi offer?

Caleffi offers mixing valves, pressure reducing valves (PRVs), pressure relief valves, air separators, zone valves, and hydronic system controls for plumbing and HVAC applications.

What is a Caleffi mixing valve used for?

Caleffi mixing valves, including thermostatic and temperature mixing valves, regulate water temperature to improve safety, comfort, and system efficiency.

What does a Caleffi pressure reducing valve do?

A Caleffi pressure reducing valve (PRV) controls incoming water pressure, protecting plumbing systems and fixtures from damage caused by high pressure.

What is a Caleffi air separator?

Caleffi air separators remove air from hydronic heating systems, improving efficiency, reducing noise, and preventing system damage.

Are Caleffi products high quality?

Caleffi products are made from premium materials and engineered for durability, offering long-lasting performance in demanding hydronic and plumbing systems.

Where are Caleffi products made?

Caleffi was founded in Italy and operates globally, with manufacturing and distribution supporting markets including Caleffi North America.

Can Caleffi products be used in residential and commercial systems?

Yes, Caleffi components are designed for residential, commercial, and industrial hydronic systems, ensuring consistent performance across applications.

Do Caleffi products help improve energy efficiency?

By regulating temperature, pressure, and air removal, Caleffi valves and components help hydronic systems operate more efficiently and reduce energy waste.

Why choose Caleffi for hydronic systems?

Caleffi stands out for precision engineering, reliable performance, and a complete range of hydronic solutions that support safe, efficient plumbing and heating systems.
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