Caleffi has been a trusted name in valves since Founded 1961, based in Italy. The brand is particularly known for Precision Italian-engineered pressure reducing valves, thermostatic mixing valves, and hydronic system components. Caleffi is positioned in the premium price tier, making it a premium investment for valves.
Caleffi Valves
Caleffi manufactures Italian-engineered pressure reducing valves, thermostatic mixing valves, zone valves, backflow preventers, air separators, and expansion vessels for hydronic heating/cooling and domestic plumbing systems. Their 535H Series PRV and 521 Series mixing valves are widely specified in commercial and residential applications.
PremiumTop-tier materials, design, and warranty
Caleffi Valves Product Lines
535H PRV Series521 Mixing ValvesZ-One Zone ValvesDISCAL Air SeparatorsBackflow Preventers
Why Choose Caleffi for Valves?
Caleffi stands out in the valves market because of Precision Italian-engineered pressure reducing valves, thermostatic mixing valves, and hydronic system components. Their products carry 4 industry certifications, including ASSE Listed, CSA Certified, NSF/ANSI 61, giving homeowners confidence in quality and compliance. Caleffi backs their valves with a Varies by product; most valves carry a manufacturer warranty against defects, which shows commitment to long-term reliability. With 5 dedicated product lines — 535H PRV Series, 521 Mixing Valves, Z-One Zone Valves, DISCAL Air Separators, and more — there's a Caleffi option for virtually every need and budget.
Certifications & Standards
ASSE ListedCSA CertifiedNSF/ANSI 61ISO 9001
Warranty & Support
WarrantyVaries by product; most valves carry a manufacturer warranty against defects
Phone Support1-414-238-2360
Official Websitehttps://www.caleffi.com
Where to Buy Caleffi Valves
Valves How-To Guides
View All →How to Replace a Shut-Off Valve
Swap a stuck, leaking, or unreliable shut-off valve for a modern quarter-turn ball valve -- compression, threaded, and push-fit connections all covered.
How to Adjust a Pressure Reducing Valve
Test your water pressure, find the PRV on your main line, and adjust it to a safe 50-60 PSI -- before high pressure wears out your fixtures, appliances, and water heater.
How to Fix a Leaking Gate Valve
Stop a dripping gate valve stem -- tighten the packing nut, replace the packing, or swap the whole valve for a ball valve, depending on what the situation calls for.
Common Valves Problems
View All →Stuck Shut-Off Valve
Usually discovered during an emergency -- something is leaking and the valve will not budge. Older gate valves seize after years of disuse. Fix ranges from penetrating oil and patience to full replacement.
Leaking Valve Stem
Water dripping from around the valve handle or packing nut -- packing failure, not a pipe leak. Fix is usually tightening the nut or replacing the packing, often with the water still on.
PRV Failure -- High Water Pressure
Failing PRV lets dangerously high pressure into the house. Bursts supply lines, damages appliances, causes hammer, shortens fixture life, leaks everywhere. Normal is 40-60 PSI. Above 80 is dangerous and needs immediate attention.
Valves Types
View All →Valves Buying Guides
View All →Caleffi Valves FAQ
Is Caleffi a good brand for valves?
Caleffi S.p.A. is an Italian manufacturer of innovative components and systems for plumbing, heating, cooling, and renewable energy applications. Founded in 1961 and headquartered in Fontaneto d'Agogna, Italy, the company operates five manufacturing plants across Europe and has a strong presence in North America through Caleffi North America based in Milwaukee, Wisconsin. Caleffi is globally recognized for precision-engineered valves, air separators, and hydronic system controls.
What warranty does Caleffi offer on valves?
Caleffi offers Varies by product; most valves carry a manufacturer warranty against defects.
Where is Caleffi made?
Caleffi is based in Italy, headquartered in Fontaneto d'Agogna, Novara, Italy.
What price range does Caleffi valves fall into?
Caleffi is positioned in the premium price tier for valves. You pay more but get superior quality, materials, and warranty coverage.
What valves product lines does Caleffi offer?
Caleffi offers 5 valves product lines: 535H PRV Series, 521 Mixing Valves, Z-One Zone Valves, DISCAL Air Separators, Backflow Preventers.
What certifications does Caleffi have for valves?
Caleffi holds 4 certifications including ASSE Listed, CSA Certified, NSF/ANSI 61.