Plumber login

Giacomini

Founded 1951 Italy premium price 1,500+ employees

About Giacomini

Giacomini S.p.A. is an Italian manufacturer of valves, fittings, and components for hydronic heating, plumbing, and radiant floor systems. Founded in 1951 in San Maurizio d'Opaglio in Italy's faucet district, Giacomini has grown into a global supplier with manufacturing facilities in Italy, Spain, and China, and distribution in over 50 countries. They are especially well-regarded for their radiant heating manifolds, thermostatic radiator valves, and PEX distribution systems.

Known for: Italian-made hydronic valves, radiant floor heating manifolds, and PEX distribution systems

Product Categories

Valves

Giacomini manufactures thermostatic radiator valves, zone valves, balancing valves, pressure reducing valves, and mixing valves for hydronic heating and plumbing systems. Their R470 and R401 series are widely used in radiant floor heating installations.

Product Lines: R470 Thermostatic Valves R401 Mixing Valves Zone Valves Balancing Valves
View Giacomini Valves

Pipes & Fittings

Giacomini produces radiant floor heating manifolds, PEX distribution manifolds, multilayer pipe fittings, and complete radiant panel systems for residential and commercial hydronic installations.

Product Lines: Radiant Heating Manifolds PEX Manifolds Multilayer Fittings R557 Manifold Series
View Giacomini Pipes & Fittings

Certifications & Standards

ISO 9001 UPC Listed CSA Certified

Warranty

Varies by product; typically 2-5 year manufacturer warranty

Related How-To Guides

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.
How to Solder Copper Pipe

Solder (sweat) copper pipe joints the right way -- cut, clean, flux, heat, and feed solder for watertight connections that last the life of the building.

Common Problems

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.
Pinhole Leaks in Copper

Tiny holes from the inside out due to pitting corrosion. Start as small drips or green stains. One is a repair. Multiple are a warning that the entire system may be deteriorating.