The Caleffi 508100A is a HYGROCAL air vent with Caleffi hydronic, used to automatically discharge air that collects at the high points of hydronic heating and cooling systems.
Product data compiled from Caleffi North America technical documentation. Last reviewed June 2026.
FunctionAutomatic Air Vent
Warranty2 Years
Key Features
Automatic Air Discharge
A float mechanism opens to release accumulated air automatically, then reseals as the system fills.
High-Point Venting
Installs at manifolds, separators and pump locations where air naturally collects.
Technical Data
| Function | Automatic float air vent |
|---|---|
| Series | Caleffi HYGROCAL |
Documentation
Technical brochureRelated Products
Frequently Asked Questions
Where is the Caleffi 508100A installed?
At the high points of a hydronic system such as manifolds, air separators and pump locations, where air naturally collects.
How does it release air automatically?
An internal float drops as air accumulates, opening the discharge port; when water returns, the float rises and reseals the vent.
2-Year Limited Warranty. Backed by Caleffi North America's limited warranty against defects in material and workmanship for two years from date of shipment. See Caleffi's limited warranty for full terms.
- Type:
- Air Vent
- Series:
- HYGROCAL
