A top-off reservoir or auto-fill line running unattended needs a reliable backstop in case the primary control fails - the IceCap Magnet Mount Float Valve provides that with zero electricity involved.
Why a Mechanical Backup Matters
Electronic ATO systems and controllers can fail, and when they do, an unattended top-off line can keep running well past where it should stop. A simple mechanical float valve shuts off flow at a set level regardless of whether any electronics are working correctly.
What It Offers
- Mechanically shuts off water flow once the float rises to your set level - no electricity, no controller, no software to fail.
- Magnet mount design for straightforward positioning against the tank or sump wall.
- Works as a standalone shutoff or as a backup safety layer behind an electronic ATO system.
Setup Tips
- Use as a backup behind your primary ATO, not necessarily as the only line of defense.
- Set the float level with margin below where overflow would actually occur.
- Check the float moves freely periodically, since debris or biofilm buildup can affect mechanical float valves over time.
The IceCap Magnet Mount Float Valve is available at Marine Concept Supply - order online or pick up at our shop in Wheeling, IL. Shop the Float Valve, and browse more aquarium care products.
