Caleffi Robocal Automatic Air Vent - 1/2 inch Male Thread
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Product Information
Full details
The Caleffi Robocal Automatic Air Vent is designed for homeowners and HVAC professionals managing sealed hydronic heating systems who need a reliable, set-it-and-forget-it solution to trapped air. Its primary benefit is the automated release of air pockets that cause noise and heating inefficiencies, though users should note it is specifically engineered for closed-loop, sealed systems rather than open-vented plumbing setups.
All features
| Brand | Caleffi |
|---|
Extended Product Information
FAQs
Can I install this on a radiator?
Yes, it is suitable for radiators if there is a 1/2 inch port at the high point, though it is more commonly used on manifolds or system piping high points.
Is this vent for steam heating systems?
No, the Caleffi Robocal is specifically designed for hydronic (water-based) closed-loop heating systems.
Should the top cap be tight?
The cap should be left slightly loose to allow air to escape. If you need to stop the vent from working temporarily, you can tighten it.
Does it require electricity?
No, it is a purely mechanical device that operates based on system pressure and the displacement of an internal float.
Can I use this in an open-vented system?
No, this valve is designed exclusively for sealed (pressurized) hydronic systems.
Troubleshooting
Water leaking from the top of the valve
Debris may be caught in the internal seal. Briefly unscrew the cap to flush the valve, or check if the system pressure is within the specified operating range.
Air is not being released
Ensure the valve is installed vertically and that the dust cap is sufficiently loosened to permit air flow.
Pros and Cons
Pros
- Fully automatic operation saves time on manual maintenance
- Prevents common issues like airlocks and radiator noise
- Reliable performance in sealed heating systems
- Standardized sizing for straightforward installation
Cons
- Not suitable for open-vented water systems
- Requires proper high-point placement to function effectively
- Must be kept free of debris to ensure a proper seal
Setup, Compatibility & Care
Installation should be performed by a qualified technician to ensure the system is properly depressurized first. The valve must be mounted vertically at the highest point of the system or on a radiator manifold for optimal performance. Because it is a mechanical device, periodically check the valve cap for any signs of leakage or salt deposits, which might indicate that debris has blocked the internal seat. Keep the dust cap slightly loose to allow the air to escape freely during operation; tightening it fully will shut off the vent function.