A drip leg is a section of pipe or tubing installed in a compressed air system to collect moisture and condensation before it reaches sensitive equipment. As compressed air cools, water vapor naturally forms inside the piping, and the it provides a controlled place for that moisture to settle.
This simple component plays a critical role in keeping compressed air systems clean, efficient, and reliable.
How a Drip Leg Works
It is typically installed vertically below an air line. As air flows through the system:
- Moisture separates from the air due to gravity
- Condensation settles at the bottom of this
- A built-in drain valve allows collected water to be released safely
By removing moisture early, the system reduces the risk of corrosion, freezing, and equipment damage.
Where These Are Installed
These are commonly found in:
- Air headers
- Air drops
- Compressed air distribution lines
- Industrial facilities using pneumatic tools or equipment
They are especially important at low points in the system where condensation naturally accumulates.
Why Drip Legs Are Important
Without proper moisture control, compressed air systems can suffer from:
- Rust and internal pipe damage
- Reduced air quality
- Malfunctioning pneumatic tools
- Increased maintenance costs
Installing drip legs helps extend system life and ensures consistent performance.
A drip leg removes water and condensation that form inside compressed air piping.
Most systems benefit from drip legs, especially in environments with temperature changes or high humidity.
Drain frequency depends on system usage and moisture levels, but regular inspection is recommended.
No. A drip leg removes liquid condensation, while an air dryer removes moisture from the air itself.
