AutoAqua Smart ATO RO Auto Top Off System for RO

The AutoAqua Smart ATO RO is built for a different job than a standard ATO — instead of topping off the display tank, it automatically refills your RO/DI reservoir directly from your RO or RODI system, so you never have to remember to shut the system off manually and risk a flood.

• Best for: automating RO/DI reservoir refill from an RO or RODI system
• Sensors: magnetic-mount dual optical sensors plus a float valve kit for triple-layer overflow protection — if the primary sensor fails, the backup and float valve still prevent overfilling
• Benefit: keeps the reservoir topped off consistently, helping avoid TDS creep and reducing wasted RO membrane/resin capacity from a forgotten, continuously-running system
• Safety: Quick Security Technology (QST) with real-time failsafe timer, audible and LED alarms; water-resistant design protects the pump/adapter connector from corrosion
• Specs: 100-240VAC input, 4.5W @ 12VDC controller; DC solenoid valve 6W @ 12VDC, 0.02-0.7MPa pressure rating, 1/4in RO tubing connection; sensor mount up to 1/2in, tube holder up to 3/4in; 9.8ft of 1/4in RO tubing included

Includes: controller, power adapter, DC solenoid valve, float valve kit, 9.8ft of 1/4in RO tubing.

The float valve kit is a meaningful extra layer here — it's a fully mechanical backup that still works even in a total electronics failure, which matters on a device managing your RO/DI supply line.

At Marine Concept Supply, all sales are final. Due to the sensitive nature of live animals and aquatic products, we do not accept returns or exchanges under any circumstances. Please review your order carefully before completing your purchase. No Cancellations.

If you have any questions or concerns about your order, please contact us at shop@marineconceptsupply.com and we’ll do our best to assist you.

We Ship UPS and will send tracking as soon as the item ships. 

Return shipping for any approved warranties are not covered and will be subtracted from the approved credit total.

Restock Fees apply to some products, due to their size or a manufacturer policy.Each product with a restock charge is marked online, in the description.

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right