Walk past almost any apartment block on a summer morning and you'll see it: water streaming off the rooftop tank, running down the outer wall, pooling on the terrace. It's such a common sight that most residents have stopped noticing it. But that overflow is treated, pumped water — going straight down the drain, every single day, in every building where it happens
MyTank's Automated Wireless Valve and level monitoring system are built to stop this at the source, automating tank filling so overflow and wastage simply stop happening — without rewiring the building.
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Why Residential Tanks Overflow So Often**
Most overhead tanks still rely on one of two things: a person physically checking the water level, or a motor running on a fixed timer regardless of how full the tank actually is. Both fail in predictable ways.
The person checking the tank forgets, or gets busy, or simply isn't around when the tank fills up. The timer, meanwhile, was often set months ago for a different season and never adjusted — so it keeps running the motor for longer than the tank actually needs.
Multiply that across every unit in a building, and overflow stops being an occasional mistake and becomes a routine, daily loss. It's rarely tracked, because unlike a leaking tap inside a flat, it doesn't show up clearly on anyone's bill — it just quietly adds up.
How Automatic Level Sensing Replaces Guesswork
Instead of depending on a person or a fixed timer, a wireless level sensor sits inside the tank and continuously reports exactly how full it is. That reading travels over LoRa wireless communication — no Wi-Fi or building cabling required — to a controller that knows precisely when to start filling the tank, and just as importantly, exactly when to stop.
This replaces guesswork with a system that:
Reads the tank level in real time, instead of relying on periodic manual checks
Starts the motor automatically once the level drops below a set threshold
Stops filling the instant the tank reaches full — not a minute later
Sends an alert if a sensor or motor isn't behaving as expected
Wireless Valves That Shut Off the Moment the Tank Is Full
Level sensing tells the system when a tank is full — the valve is what actually acts on that information. MyTank's Automated Wireless Valve sits on the inlet line and receives the shutoff command directly from the level sensor's reading, closing the line the instant the tank hits capacity.
Because the valve uses upstream pilot control, it works reliably even at the low pressure typical of rooftop tanks — operating from as low as 0.3 bar without needing a booster pump. And because it closes gradually through progressive open/close control, the shutoff happens smoothly, without the sudden bang of water hammer that stresses pipe joints over time.
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A few numbers worth knowing:
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0.3 bar — minimum pressure the valve needs to operate
5 km — LoRa communication range across a property
IP65 — weatherproof rating for rooftop and outdoor exposure
Retrofitting Without Breaking Walls or Rewiring
Existing buildings are usually the hardest place to add automation, because running new control cable from a rooftop tank down to a management office typically means breaking through walls and ceilings — not something most housing societies or landlords want to approve.
Because the valve and sensor communicate wirelessly over LoRa, there's no cabling to run at all. The valve installs directly onto the existing inlet pipe, the sensor drops into the existing tank, and both connect to a gateway placed anywhere within range — commonly a utility room or the terrace itself. Most installations are completed in a single visit, with no structural work involved.
One gateway can typically manage sensors and valves across every tank on a property, not just one unit — which makes the system scale naturally as a building grows or adds more tanks.
**What Residents and Facility Managers Gain
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For residents, the change is mostly invisible: the tank simply never overflows, and the motor never runs dry or gets accidentally left on. For the people managing the building, the gains are more concrete.
StakeholderWhat ChangesFacility managerNo more manual tank checks or chasing down overflow complaintsHousing society / ownerLower water bills and less strain on pumps from dry-runningResidentsConsistent supply, without last-minute "the tank is empty" surprisesMaintenance staffRemote visibility into every tank, instead of physical rounds
Final Thoughts
Overflow and wastage in residential water systems aren't caused by carelessness — they're caused by depending on people and timers to do a job that's naturally suited to sensors and automation. A wireless level sensor paired with an automatic valve closes that gap: the tank fills exactly when it needs to, stops exactly when it's full, and does it all without a single wire run through the building.
For housing societies and facility managers looking to cut water bills and eliminate a daily source of waste, this is one of the simplest automation upgrades to retrofit — and one of the fastest to pay for itself.
Ready to stop overflow at your building? Explore MyTank's Automated Wireless Valve →
Frequently Asked Questions
Does this require rewiring the building?
No. The valve and level sensor communicate wirelessly over LoRa, so there's no need to run new control cable through walls or ceilings.
Can one system manage multiple tanks in a building?
Yes. A single gateway can typically communicate with sensors and valves across multiple tanks and units on the same property, within LoRa's range.
Will it work with low rooftop water pressure?
Yes. The valve uses upstream pilot control and operates from as low as 0.3 bar, covering most gravity-fed rooftop tank setups.
Is the shutoff sudden, or does it risk pipe damage?
No. The valve closes gradually through progressive open/close control, which prevents water hammer and the pipe stress that comes with abrupt shutoff.
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