Parts town. Get real parts faster

Shopping Cart

Skip to NavigationSkip to Content
Loading...
Loading...
CAD
Multi-SKU Order
LoginRegister
Parts town. Get real parts faster

Find Equipment Manuals

Loading...
Loading...
Parts Town Logo

1-Hour Pickup Available

get special offers & news from parts town

800.239.5152
Loading...
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal
© 2026 Parts Town. All rights reserved.
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal

Stock Up on Real OEM HVAC Parts for the Summer Season! SHOP NOW

Call: 800.239.5152
Hvac Parts
TECHTOWN
Track My Order

Important Update: Click here for the latest information on tariffs and their impact on our industry.

Help Desk

  • Contact Us
  • Shipping
  • Taxes And Fees
  • Returns
  • FAQ

Inside Parts Town

  • About Us
  • Careers
  • Our Difference
  • Resource Center
  • Parts Town Blog
  • techtown
  • International

Technology and Innovations

  • Parts Town App
  • Serial Number Lookup
  • Smart Manuals
  • Website Features
  • Terms of Use
  • Privacy Policy
  • Privacy Request

Refined By

Brand
Caleffi

Model

loading spinner

Part Category

  • Actuators(1)
  • Bearings & Bushings(1)
  • Brackets & Retainers(4)
  • Caps & Plugs(1)
  • Controls(1)
  • Filters, Screens & Driers(9)
  • Gaskets & Seals(1)
  • Gauges & Thermometers(1)
  • Handles(1)
  • Hoses, Pipes & Tubing(1)
  • Insulation(25)
  • Knobs & Dials(1)
  • Nuts, Bolts & Screws(36)
  • Panels, Covers & Lids(2)
  • Pressure Relief Controls(6)
  • Probes & Sensors(3)
  • Pumps & Motors(5)
  • 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

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.

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.

...

No matching models were found. Please try changing your search keyword or adjusting your search selections.

Caleffi 304856A DUAL CHECK BACKFLOW ASSE 1024 3/4" PRESS DUAL UNION

Caleffi
  • Mfr Part # 304856A
  • Parts Town # CALE304856A
  • Quantity0

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

Caleffi 304857A DUAL CHECK BACKFLOW ASSE 1024 3/4" PEX CRIMP DUAL UNION

Caleffi
  • Mfr Part # 304857A
  • Parts Town # CALE304857A
  • Quantity0

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

Caleffi 304858A DUAL CHECK BACKFLOW ASSE 1024 3/4" PEX EXPANSION DUAL UNION

Caleffi
  • Mfr Part # 304858A
  • Parts Town # CALE304858A
  • Quantity0

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

Caleffi 304859A DUAL CHECK BACKFLOW ASSE 1024 3/4" SWEAT DUAL UNION

Caleffi
  • Mfr Part # 304859A
  • Parts Town # CALE304859A
  • Quantity0

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

Caleffi 304860A DUAL CHECK BACKFLOW ASSE 1024 1" MNPT DUAL UNION

Caleffi
  • Mfr Part # 304860A
  • Parts Town # CALE304860A
  • Quantity0

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

Caleffi 304866A DUAL CHECK BACKFLOW ASSE 1024 1" PRESS DUAL UNION

Caleffi
  • Mfr Part # 304866A
  • Parts Town # CALE304866A
  • Quantity0

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

Caleffi 304867A DUAL CHECK BACKFLOW ASSE 1024 1" PEX CRIMP DUAL UNION

Caleffi
  • Mfr Part # 304867A
  • Parts Town # CALE304867A
  • Quantity0

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

Caleffi 304868A DUAL CHECK BACKFLOW ASSE 1024 1" PEX EXPANSION DUAL UNION

Caleffi
  • Mfr Part # 304868A
  • Parts Town # CALE304868A
  • Quantity0

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

Caleffi 304869A DUAL CHECK BACKFLOW ASSE 1024 1" SWEAT DUAL UNION

Caleffi
  • Mfr Part # 304869A
  • Parts Town # CALE304869A
  • Quantity0

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

Caleffi 31401FD TAIL PIECE 1-1/4 FNPT FROM 548007A

Caleffi
  • Mfr Part # 31401FD
  • Parts Town # CALE31401FD
  • Quantity0

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

Caleffi 31403FD 25T008 TAIL PIECE 1-1/4 SWT

Caleffi
  • Mfr Part # 31403FD
  • Parts Town # CALE31403FD
  • Quantity0

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

Caleffi 31426FD 25T011 TAIL PIECE 2 FPT-548009A

Caleffi
  • Mfr Part # 31426FD
  • Parts Town # CALE31426FD
  • Quantity0

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

Caleffi 31428FD 25T012 TAIL PIECE 2 SWT

Caleffi
  • Mfr Part # 31428FD
  • Parts Town # CALE31428FD
  • Quantity0

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

Caleffi 31553FD UNION END 1 FEMALE NPTF

Caleffi
  • Mfr Part # 31553FD
  • Parts Town # CALE31553FD
  • Quantity0

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

Caleffi 31554FD 1 SWT FITTING FOR 5231 SERIES

Caleffi
  • Mfr Part # 31554FD
  • Parts Town # CALE31554FD
  • Quantity0

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

Caleffi 31901A 3/4 MNPT FITTING

Caleffi
  • Mfr Part # 31901A
  • Parts Town # CALE31901A
  • Quantity0

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

Caleffi 337221A 1/4 NPT DRAIN COCK W/METAL SEAL

Caleffi
  • Mfr Part # 337221A
  • Parts Town # CALE337221A
  • Quantity0

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

Caleffi 338452 RADIATOR VALVE THERMOSTATIC ELBOW 3/4M

Caleffi
  • Mfr Part # 338452
  • Parts Town # CALE338452
  • Quantity0

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

Caleffi 339452 RADIATOR VALVE THERMO.STRAIGHT 1/2X3/4

Caleffi
  • Mfr Part # 339452
  • Parts Town # CALE339452
  • Quantity0

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

Caleffi 342452 ELBOW LOCKSHIELD 1/2M X 3/4M

Caleffi
  • Mfr Part # 342452
  • Parts Town # CALE342452
  • Quantity0

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

Caleffi 343452 STRAIGHT LOCKSHIELD 1/2 X 3/4 18

Caleffi
  • Mfr Part # 343452
  • Parts Town # CALE343452
  • Quantity0

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

Caleffi 386500 SCREW PLUG 3/4

Caleffi
  • Mfr Part # 386500
  • Parts Town # CALE386500
  • Quantity0

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

Caleffi 387100 PEX FITTING WRENCH 26MM-30MM

Caleffi
  • Mfr Part # 387100
  • Parts Town # CALE387100
  • Quantity0

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

Caleffi 387127 DVL UNIVERSAL KEY

Caleffi
  • Mfr Part # 387127
  • Parts Town # CALE387127
  • Quantity0

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

119120121