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...

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

Parts Town Logo

1-Hour Pickup Available

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.

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

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

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 121149A4G0 FLOWCAL 1/2 SWT 4 GPM

Caleffi
  • Mfr Part # 121149A4G0
  • Parts Town # CALE121149A4G0
  • Quantity0

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

Caleffi 121149A4G5 FLOWCAL 1/2 SWT 4.5 GPM

Caleffi
  • Mfr Part # 121149A4G5
  • Parts Town # CALE121149A4G5
  • Quantity0

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

Caleffi 121149A5G0 FLOWCAL 1/2 SWT 5 GPM

Caleffi
  • Mfr Part # 121149A5G0
  • Parts Town # CALE121149A5G0
  • Quantity0

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

Caleffi 121149A6G0 FLOWCAL 1/2 SWT 6 GPM

Caleffi
  • Mfr Part # 121149A6G0
  • Parts Town # CALE121149A6G0
  • Quantity0

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

Caleffi 121149A7G0 FLOWCAL 1/2 SWT 7 GPM

Caleffi
  • Mfr Part # 121149A7G0
  • Parts Town # CALE121149A7G0
  • Quantity0

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

Caleffi 121149A8G0 FLOWCAL 1/2 SWT 8 GPM

Caleffi
  • Mfr Part # 121149A8G0
  • Parts Town # CALE121149A8G0
  • Quantity0

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

Caleffi 121149A9G0 FLOWCAL 1/2 SWT 9 GPM

Caleffi
  • Mfr Part # 121149A9G0
  • Parts Town # CALE121149A9G0
  • Quantity0

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

Caleffi 121149AG35 FLOWCAL 1/2 SWT .35 GPM

Caleffi
  • Mfr Part # 121149AG35
  • Parts Town # CALE121149AG35
  • Quantity0

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

Caleffi 121149AG50 FLOWCAL 1/2 SWT .5 GPM

Caleffi
  • Mfr Part # 121149AG50
  • Parts Town # CALE121149AG50
  • Quantity0

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

Caleffi 121149AG75 FLOWCAL 1/2 SWT .75 GPM

Caleffi
  • Mfr Part # 121149AG75
  • Parts Town # CALE121149AG75
  • Quantity0

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

Caleffi 121151A FLOWCAL 3/4 NPT

Caleffi
  • Mfr Part # 121151A
  • Parts Town # CALE121151A
  • Quantity0

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

Caleffi 121151A10G FLOWCAL 3/4 NPT 10 GPM

Caleffi
  • Mfr Part # 121151A10G
  • Parts Town # CALE121151A10G
  • Quantity0

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

Caleffi 121151A1G0 FLOWCAL 3/4 NPT 1 GPM

Caleffi
  • Mfr Part # 121151A1G0
  • Parts Town # CALE121151A1G0
  • Quantity0

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

Caleffi 121151A1G3 FLOWCAL 3/4 NPT 1.3 GPM

Caleffi
  • Mfr Part # 121151A1G3
  • Parts Town # CALE121151A1G3
  • Quantity0

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

Caleffi 121151A1G5 FLOWCAL 3/4 NPT 1.5 GPM

Caleffi
  • Mfr Part # 121151A1G5
  • Parts Town # CALE121151A1G5
  • Quantity0

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

Caleffi 121151A1G7 FLOWCAL 3/4 NPT 1.7 GPM

Caleffi
  • Mfr Part # 121151A1G7
  • Parts Town # CALE121151A1G7
  • Quantity0

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

Caleffi 121151A2G0 FLOWCAL 3/4 NPT 2 GPM

Caleffi
  • Mfr Part # 121151A2G0
  • Parts Town # CALE121151A2G0
  • Quantity0

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

Caleffi 121151A2G2 FLOWCAL 3/4 NPT 2.2 GPM

Caleffi
  • Mfr Part # 121151A2G2
  • Parts Town # CALE121151A2G2
  • Quantity0

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

Caleffi 121151A2G5 FLOWCAL 3/4 NPT 2.5 GPM

Caleffi
  • Mfr Part # 121151A2G5
  • Parts Town # CALE121151A2G5
  • Quantity0

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

Caleffi 121151A2G6 FLOWCAL 3/4 NPT 2.6 GPM

Caleffi
  • Mfr Part # 121151A2G6
  • Parts Town # CALE121151A2G6
  • Quantity0

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

Caleffi 121151A3G0 FLOWCAL 3/4 NPT 3 GPM

Caleffi
  • Mfr Part # 121151A3G0
  • Parts Town # CALE121151A3G0
  • Quantity0

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

Caleffi 121151A3G5 FLOWCAL 3/4 NPT 3.5 GPM

Caleffi
  • Mfr Part # 121151A3G5
  • Parts Town # CALE121151A3G5
  • Quantity0

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

Caleffi 121151A4G0 FLOWCAL 3/4 NPT 4 GPM

Caleffi
  • Mfr Part # 121151A4G0
  • Parts Town # CALE121151A4G0
  • Quantity0

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

Caleffi 121151A4G5 FLOWCAL 3/4 NPT 4.5 GPM

Caleffi
  • Mfr Part # 121151A4G5
  • Parts Town # CALE121151A4G5
  • Quantity0

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

111213