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Caleffi Replacement Parts

Caleffi specializes in precision-engineered components that protect hydronic and HVAC systems from pressure imbalance and thermal stress. These parts are essential for maintaining safe operation while improving overall system efficiency.

  • Pressure relief and safety valves
  • Radiant manifolds
  • Flow switches
  • Temperature and pressure monitoring devices

Parts Town offers a wide range of real OEM Caleffi parts that are always genuine OEM and tested and approved by the equipment manufacturer. Designed for exact fit and dependable performance, these components help deliver reliability, safety, efficiency and warranty protection across demanding applications.

With the most in-stock parts on the planet, Parts Town helps minimize downtime when system issues arise. Plus, Parts Town offers same-day shipping on in-stock items until 9 PM ET Monday–Friday, making it easy to get real parts faster and keep equipment protected.

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Caleffi

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  • Insulation(25)
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  • Nuts, Bolts & Screws(36)
  • Panels, Covers & Lids(2)
  • Pressure Relief Controls(6)
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  • Regulators(12)
  • Switches & Buttons(18)
  • Valves, Solenoids & Fittings(363)
  • Washers, Rings & Spacers(11)

Category

Plumbing Supplies (37)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

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Caleffi

Caleffi Parts & Manuals

Caleffi parts from Parts Town are built to safeguard hydronic and HVAC systems where pressure balance and temperature control matter most. Our selection of real OEM Caleffi replacement parts includes critical components like air separators, balancing valves and pressure relief valves designed to protect equipment from damage. We only carry genuine OEM Caleffi parts so you can keep your system well-maintained and performing reliably day in and day out.

...
Caleffi

Caleffi Parts & Manuals

Caleffi parts from Parts Town are built to safeguard hydronic and HVAC systems where pressure balance and temperature control matter most. Our selection of real OEM Caleffi replacement parts includes critical components like air separators, balancing valves and pressure relief valves designed to protect equipment from damage. We only carry genuine OEM Caleffi parts so you can keep your system well-maintained and performing reliably day in and day out.

...

Caleffi 521417A MIXCAL™ 3-WAY MIXING VALVE 1/2" PEX CRIMP W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521417A
  • Parts Town # CALE521417A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521417AC MIXCAL™ 3-WAY MIXING VALVE 1/2" PEX CRIMP W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521417AC
  • Parts Town # CALE521417AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521418A MIXCAL™ 3-WAY MIXING VALVE 1/2" PEX EXPANSION W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521418A
  • Parts Town # CALE521418A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521418AC MIXCAL™ 3-WAY MIXING VALVE 1/2" PEX EXPANSION W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521418AC
  • Parts Town # CALE521418AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521419A MIXCAL™ 3-WAY MIXING VALVE 1/2" SWEAT W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521419A
  • Parts Town # CALE521419A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521419AC MIXCAL™ 3-WAY MIXING VALVE 1/2" SWEAT W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521419AC
  • Parts Town # CALE521419AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521500AC MIXCAL™ 3-WAY MIXING VALVE 3/4" NPT W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521500AC
  • Parts Town # CALE521500AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521506A Thermostatic Mixing Valve Kit, 3-Way, Adjustable, 3/4" Press, MixCal

Caleffi
  • Mfr Part # 521506A
  • Parts Town # CALE521506A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521506AC MIXCAL™ 3-WAY MIXING VALVE 3/4" PRESS W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521506AC
  • Parts Town # CALE521506AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521507A MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX CRIMP-ASSE 1017

Caleffi
  • Mfr Part # 521507A
  • Parts Town # CALE521507A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521507AC MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX CRIMP W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521507AC
  • Parts Town # CALE521507AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521508A MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX EXPANSION-ASSE 1017

Caleffi
  • Mfr Part # 521508A
  • Parts Town # CALE521508A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521508AC MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX EXPANSION W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521508AC
  • Parts Town # CALE521508AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521509AC MIXCAL™ 3-WAY MIXING VALVE 3/4" SWEAT W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521509AC
  • Parts Town # CALE521509AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521510A MIXCAL™ 3-WAY MIXING VALVE 3/4" NPT W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521510A
  • Parts Town # CALE521510A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521510AC MIXCAL™ 3-WAY MIXING VALVE 3/4" NPT W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521510AC
  • Parts Town # CALE521510AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521517A MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX CRIMP W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521517A
  • Parts Town # CALE521517A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521517AC MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX CRIMP W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521517AC
  • Parts Town # CALE521517AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521518A MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX EXPANSION W/ TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521518A
  • Parts Town # CALE521518A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521518AC MIXCAL™ 3-WAY MIXING VALVE 3/4" PEX EXPANSION W/CHECK VALVES & TEMP GAUGE-ASSE 1017

Caleffi
  • Mfr Part # 521518AC
  • Parts Town # CALE521518AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521600A MIXCAL™ 3-WAY MIXING VALVE 1" NPT-ASSE 1017

Caleffi
  • Mfr Part # 521600A
  • Parts Town # CALE521600A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521600AC MIXCAL™ 3-WAY MIXING VALVE 1" NPT W/CHECK VALVES-ASSE 1017

Caleffi
  • Mfr Part # 521600AC
  • Parts Town # CALE521600AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521606A MIXCAL™ 3-WAY MIXING VALVE 1" PRESS-ASSE 1017

Caleffi
  • Mfr Part # 521606A
  • Parts Town # CALE521606A
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Caleffi 521606AC MIXCAL™ 3-WAY MIXING VALVE 1" PRESS, CHECK-ASSE 1017

Caleffi
  • Mfr Part # 521606AC
  • Parts Town # CALE521606AC
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

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