Which water leak detection systems offer automatic shut-off valves for high-rise condos?

Installing a smart water leak detection system with an automatic shut-off valve is one of the best ways to protect a high-rise condo (and your neighbors below you) from catastrophic water damage.

When choosing a system for a high-rise condo, space constraints, ease of inline plumbing vs. retrofit options, Wi-Fi connectivity (often challenging on higher floors), and building association rules are major factors.

Top options featuring automatic shut-off valves well-suited for condos include:

• Moen Flo Smart Water Shutoff — A whole-home, inline system that installs directly on your main water supply line (typically 3/4" to 11/4"). It monitors water pressure, flow rate, and temperature 24/7. It runs daily "MicroLeak" tests to catch tiny drips behind walls and automatically shuts off the water if it detects an abnormal or catastrophic leak. You can buy it at retailers like Home Depot.[1]
• Phyn Plus Smart Water Assistant and Shutoff — Uses high-precision ultrasonic pressure sensors to measure tiny changes in water pressure 240 times a second. It learns your condo's specific water footprint and can identify micro-leaks anywhere in the system, automatically shutting off the main valve before a major flood occurs. It also features a built-in backup battery or manual override options.youtube.com
• Resideo Braukmann L5 WiFi Actuator — A more budget-friendly and compact motorized ball valve kit paired with leak detector cables or remote sensors. When the sensor gets wet, the L5 instantly triggers the actuator to close the valve. Available options like the Edmondson Supply package include the actuator, a lead-free ball valve, and remote wireless water sensors.[1]
• Qolsys IQ Water Valve — A retrofit-style automatic water shut-off solution that attaches directly onto existing quarter-turn ball valves without requiring a professional plumber to cut into your main water line. It communicates via Z-Wave and can be integrated into smart home/security panels (like Alarm.com), making it ideal if your condo association restricts cutting or modifying main common-element plumbing lines.[1]
• iSpring Water Leak Detector Alarm System (LS43) — Features an automatic 3/4" NPT shut-off ball valve linked to wired or wireless floor sensors placed near high-risk areas like washing machines, water heaters, or under kitchen sinks. Available through vendors like Home Depot , it provides an affordable local alarm and valve closure system.[1]

To help narrow down the best choice, tell me:

• Does your condo association require a specific type of professional installation or restrict modifications to the main water line?
• Do you prefer a whole-home inline monitor (like Moen/Phyn) or point-of-use sensors with a retrofit valve clamp?

For a high-rise condo, the key question is whether you can install a valve on your unit’s individual water supply. Many buildings have shared risers or require HOA/board approval, so a whole-building/main-riser solution may not be appropriate.

Systems worth considering

System	Automatic shutoff	Leak detection	Best fit for a condo
Moen Flo Smart Water Monitor & Shutoff	Yes	Flow/pressure monitoring + optional point sensors	Strong option if you have access to your unit's main supply
Phyn Plus Smart Water Assistant + Shutoff	Yes	Pressure-wave analysis + sensors	Good for detailed whole-unit monitoring
Kohler H2Wise +	Yes	Powered by Phyn technology	Good alternative to Phyn with Kohler ecosystem
YoLink FlowSmart	Yes	Flow monitoring + wireless sensors	Particularly interesting where long wireless sensor range is useful
YoLink LeakStop	Yes, at individual fixtures	Point-of-use leak detection	Good for toilets, sinks, washing machines rather than whole-unit protection

• MOEN Flo 3/4 in. Shutoff Whole-Home Leak Detector - $559.00 (The Home Depot)

Moen Flo is probably the simplest category to investigate first: it installs in the water supply line, continuously monitors flow/pressure/temperature, and can automatically close the valve when abnormal water use indicates a leak. Current versions are available in several pipe sizes.

• Phyn Plus Smart Water Assistant + Shutoff - $579.99 (Phyn)

Phyn Plus uses pressure-wave analysis to identify leaks and can automatically shut off the water. This can be attractive in a condo because it doesn't depend solely on placing a moisture sensor exactly where the leak occurs.

• KOHLER H2Wise + Smart Home Water Monitor and Automatic Shutoff - $540.03 (The Home Depot)

Kohler H2Wise+ is another whole-unit option; it uses Phyn technology and combines monitoring with automatic shutoff.

What I'd look for specifically in a high-rise

• Unit-level installation: The valve should be downstream of your unit's shutoff, not on a building-wide riser.
• Automatic closure: Don't settle for a system that merely sends a phone notification.
• Local/manual override: Important if Wi-Fi or the cloud is unavailable.
• Power-loss protection: This matters in a high-rise where an electrical outage could otherwise compromise the system. Moen, for example, offers a battery-backup accessory.
• Multiple remote sensors: Put them under the dishwasher, washing machine, water heater, sinks, and near toilets. The main-line monitor and point sensors complement each other.
• HOA/plumbing approval: Verify that installing a motorized valve on your unit's supply doesn't violate building plumbing rules or affect a shared shutoff.

One important distinction: a system such as Flo/Phyn monitors the water flowing through the unit's supply, whereas a small sensor/valve such as YoLink LeakStop can shut off a specific fixture. For a condo, a combination of whole-unit shutoff + strategically placed sensors can provide broader protection.

If you tell me the condo's approximate age, whether you have an individual water meter/shutoff, and the pipe size (½", ¾", 1", etc.), I can narrow this down to the systems that are realistically installable and compare installation requirements and costs.

Yes. For a high-rise condo, there are several systems with an automatic shut-off valve. The key requirement is that your condo has an individually plumbed water supply with its own shutoff; for example, Phyn explicitly says its system can work in a multi-unit building when the unit has its own main supply, meter, shutoff, and appropriate isolation.Phyn Help Center

• Moen Flo Smart Water Monitor & Shutoff - $559.00 (The Home Depot)
• Phyn Plus 2nd Gen - $579.99 (Phyn)
• Kohler H2Wise+ - $540.03 (The Home Depot)
• GROHE Sense Guard Smart Water Controller - $452.99 (The Home Depot)
• FloLogic Automatic Water Shutoff - $3,340.00 (Tradewinds Water Filtration)

Main options

• Moen Flo Smart Water Monitor & Shutoff — Monitors flow, pressure and temperature continuously and can automatically close the main valve when it detects an abnormal condition. Separate Moen leak detectors can also be configured to trigger the shutoff, which is useful for bathrooms, laundry areas and HVAC equipment.Moen+1
• Phyn Plus 2nd Gen — Uses high-resolution pressure-wave analysis and has an integrated automatic shutoff. Phyn specifically documents multi-unit/condo compatibility, subject to the plumbing requirements above.Phyn Help Center
• Kohler H2Wise+ — A Phyn-powered whole-unit monitoring system with automatic shutoff capability.
• GROHE Sense Guard — Continuously monitors the water system and can automatically shut off the supply when it detects a significant leak or burst.
• — A more professionally oriented whole-line system, including larger pipe sizes, worth considering for luxury/high-value units or buildings where a robust plumbing installation is desired.

What matters particularly in a high-rise

Before buying, have the building plumber/HOA confirm:

1. Dedicated unit water line — You don't want a valve inadvertently controlling multiple units.
2. Pipe diameter — Common residential versions include ¾", 1", and 1¼"; larger systems are available.
3. Location of the unit's existing shutoff — The smart valve normally goes on the incoming line.
4. Power availability and backup — A power interruption shouldn't leave you without protection; Moen, for example, offers a battery-backup accessory.Moen
5. HOA/building approval — High-rise plumbing modifications may require approval even if the valve is entirely within your unit.
6. Point sensors — Whole-line monitoring is valuable, but sensors under toilets, sinks, washing machines, and HVAC condensate equipment provide an additional layer. Moen's detectors, for example, can directly trigger its shutoff.Moen Solutions

For an individual condo, Moen Flo and Phyn Plus are the two systems I'd investigate first, primarily because both combine whole-line detection with automatic shutoff and have documented functionality relevant to individually plumbed units. That's a comparison of their documented features, not a ranking.

If you tell me your pipe size (¾", 1", 1¼", etc.) and whether you have an individual water meter, I can narrow down which systems are actually compatible and compare installation requirements and current prices.

Yes. For a high-rise condo, the best systems are those that can be installed on your unit's incoming water line and automatically close a motorized valve when a leak is detected.

• Moen Flo Smart Water Monitor & Shutoff - $599.99 (Lowe's)
• Phyn Plus 2nd Gen Smart Water Assistant + Shutoff - $579.99 (Phyn)
• Kohler H2Wise+ Smart Water Monitor - $540.03 (The Home Depot)
• GROHE Sense Guard - $418.00 (The Home Depot)
• YoLink FlowSmart All-in-One - $459.99 (YoLink)

Best options for a high-rise condo

• Moen Flo Smart Water Monitor & Shutoff — my top overall choice. It monitors flow and pressure continuously, can detect very small leaks, and can automatically close the main valve. Moen also offers separate Flo moisture detectors that can be linked to the shutoff, so a sensor under a sink, dishwasher, or water heater can trigger the main valve. Moen Moen Solutions Particularly good: ¾", 1", and 1¼" configurations are available, which is useful for condo-unit plumbing.Moen Plumber

• Phyn Plus 2nd Gen — excellent alternative. It uses high-resolution pressure-wave analysis and has an integrated automatic shutoff valve. This is attractive if you want whole-unit leak detection without putting moisture sensors everywhere.

• Kohler H2Wise+ — good premium alternative. It is powered by Phyn technology and combines water monitoring with remote/automatic shutoff.

• GROHE Sense Guard — another whole-line option. It continuously monitors water pressure/flow and can automatically shut off the supply when it detects a serious anomaly.

• YoLink FlowSmart — particularly interesting for condos with difficult sensor placement. It combines leak detection and automatic shutoff, and YoLink's long-range wireless system makes adding multiple leak sensors relatively flexible.YoLink

What matters specifically in a high-rise

The plumbing arrangement is more important than the brand. Before purchasing, verify:

1. Does your unit have a dedicated incoming water line? The valve needs to be installed on your unit's supply, not a building/common riser.
2. Where is the existing unit shutoff? Ideally there's an accessible valve in your unit or a mechanical/plumbing closet.
3. Pipe size: ¾", 1", and 1¼" are common possibilities, but measure rather than assume.
4. HOA/building approval: Many high-rises require approval before modifying supply plumbing.
5. Power and Wi-Fi: Moen Flo, for example, normally requires AC power and Wi-Fi; a battery-backup accessory is available.Moen
6. False-shutoff risk: In a condo, you don't want the valve shutting off water because someone is taking a long shower. Look for adjustable detection thresholds and/or configurable sensors.
7. Local/manual operation: I'd favor a system that can still be operated if the internet is down.

For most individual condo units, I'd shortlist Moen Flo and Phyn Plus first. If your biggest concern is a washing-machine/dishwasher/toilet failure, I'd add multiple point moisture sensors to whichever whole-line system you choose.

If you tell me your condo's approximate pipe size and where the main shutoff is located (e.g., under kitchen sink, utility closet, mechanical closet), I can narrow this to the best 2–3 systems and explain which is easiest to install in a high-rise.

Yes. For a high-rise condo, the key issue is whether you have an individually metered/isolatable water line. Some “whole-home” systems are explicitly designed for single-family homes and may not be appropriate where the building controls the main supply.

Best options to consider

• Moen Flo Smart Water Monitor & Shutoff - $623.99 (Ferguson Home)

• Phyn Plus Smart Water Assistant + Shutoff - $579.99 (Phyn)

• Kohler H2Wise+ Smart Water Monitor - $540.03 (The Home Depot)

• GROHE Sense Guard Smart Water Controller - $418.00 (The Home Depot)

• StreamLabs Control Smart Water Shut-Off - $949.00 (Tradewinds Water Filtration)

• Moen Flo Smart Water Monitor & Shutoff — Probably the strongest mainstream option. It monitors flow, pressure and temperature and can automatically shut off the supply when it detects abnormal usage. Moen offers ¾", 1", and 1¼" versions, which is useful if your condo's individual supply line is larger than a typical house line.Moen+1

• Phyn Plus 2nd Gen — Uses pressure-wave analysis rather than relying solely on a flow meter and has a built-in automatic shutoff valve. Important for condos: Phyn says it works best with individually plumbed homes/townhomes and specifically flags condo/apartment buildings, so I'd verify compatibility with your building's plumbing before buying.Phyn

• Kohler H2Wise+ — Essentially a Phyn-powered system with automatic shutoff and remote monitoring. It can be attractive if your plumber or condo association already uses Kohler products.

• GROHE Sense Guard — Continuously monitors water pressure and detects abnormalities, automatically shutting off water after detecting a major leak/burst. GROHE

• StreamLabs Control — A more premium option offering whole-line monitoring and automatic shutoff; worth investigating for larger individual condo supply lines.

What I'd choose for a high-rise

Moen Flo would be my first system to investigate, particularly if your unit has its own accessible shutoff and water meter. It can also be paired with multiple point sensors, so a sensor under the dishwasher, washing machine, water heater, or HVAC condensate area can trigger the main shutoff.Moen Solutions

The bigger consideration isn't the brand—it's where the valve can legally and safely be installed. In a high-rise, the building may own/control the risers and branch plumbing, and shutting off a valve could potentially affect more than your unit.

Before purchasing, I'd ask your building/plumber these four questions:

1. Is my unit's domestic water supply independently metered?
2. Is there an individual unit shutoff valve accessible inside my unit?
3. What is the pipe diameter at that shutoff (¾", 1", 1¼", etc.)?
4. Does the condo association permit a motorized/automatic shutoff valve on the unit supply?

If you tell me your condo's approximate age, whether you're on an upper floor, and whether you have an accessible individual water shutoff, I can narrow this down to the 2–3 systems most suitable for a high-rise installation, including valve size and installation considerations.

Installing a water leak detection system with an automatic shut-off valve in a high-rise condo requires balancing whole-home line monitoring with localized point-of-failure protection (like under sinks, near washing machines, or by water heaters). High-rises also have strict rules regarding shut-off placement and HOA/plumbing approvals.

Top systems featuring automatic shut-off valves well-suited for condo living include:

Add to list

• How it works: Installed directly on your unit’s main water supply line, it monitors pressure, flow rate, and temperature 24/7. It runs daily "MicroLeak" tests to check for pinhole leaks behind walls.
• Condo suitability: Excellent for whole-unit protection. If it senses unusual continuous flow or a catastrophic burst, it alerts your phone and can automatically shut off the main supply. You can also pair it with wireless remote leak pucks to place near washing machines or toilets.
• Where to buy: Available via the Home Depot Moen Flo Listing.[1][2]

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• How it works: Uses high-definition pressure wave analysis (measuring pressure changes 240 times a second) to learn your water patterns and detect tiny drips or major bursts, shutting off the water instantly.
• Condo suitability: Highly accurate single-point main line monitor. Note that because it requires cutting into the main line, you will need condo board or building management approval, and a licensed plumber familiar with high-rise shutoffs.
• Where to buy: Specs and purchase options can be found via the Home Depot Phyn Plus Listing.[1][2]

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• How it works: A hardwired/plug-in control module connects to a motorized 3/4" NPT automatic shut-off ball valve and localized floor sensors. When moisture touches a sensor, it sounds an alarm and immediately triggers the valve to close.
• Condo suitability: Great for targeted or localized protection (such as enclosing a specific hot water heater closet or under a kitchen island) rather than full smart-home app metrics. It is more budget-friendly and straightforward for localized valve isolation.
• Where to buy: Available on the Home Depot iSpring LS43 Page.[1]

Add to list

• How it works: Features a central controller, a motorized brass ball valve (typically 1 inch), and wired floor sensor cables that can be strung across high-risk areas.
• Condo suitability: Ideal for utility closets or specific appliance hookups where local, rapid shut-off is mandatory without needing a complex Wi-Fi connection or smartphone app setup.
• Where to buy: Direct information is available on the U.S. Solid Store.[1]

To help narrow down the best choice, let me know:

• Does your condo association require specific certifications or a licensed plumber for main-line installations?
• Are you looking to protect the entire condo from the main entry line or just specific appliances (like a water heater or washing machine)?

Yes. For a high-rise condo, I’d focus on systems that can shut off the individual unit’s main water line, rather than systems designed only for a water heater or a single fixture.

Best options

• Moen Flo Smart Water Monitor & Shutoff - $599.99 (Lowe's)

• Phyn Plus Smart Water Assistant + Shutoff - $579.99 (Phyn)

• Kohler H2Wise+ - $540.03 (The Home Depot)

• YoLink FlowSmart All-in-One - $629.99 (YoLink)

• GROHE Sense Guard - $452.99 (The Home Depot)

• Moen Flo Shutoff — my top all-around choice. It monitors flow and pressure continuously, can detect very small leaks, and automatically closes the main valve. It comes in sizes including ¾", 1", and 1¼", which is useful for condo unit plumbing.Moen+1

• Phyn Plus 2nd Gen — excellent for sophisticated leak detection. It uses high-definition pressure-wave analysis and has a built-in automatic shutoff valve. Importantly for condos, Phyn says some multifamily buildings work if each unit has an individual plumbing line/meter; a pressure-regulating valve may also be required.Phyn+1

• Kohler H2Wise+ — another strong condo option. It's powered by Phyn technology and combines whole-unit monitoring with remote/automatic shutoff.

• YoLink FlowSmart — particularly interesting for high-rises. YoLink specifically markets its water-management packages for condos, apartments and other multi-unit buildings, and its FlowSmart valve can detect leaks and shut off water automatically. Its long-range communication is also designed to reduce dependence on Wi-Fi.YoLink

• GROHE Sense Guard — another whole-line option. It monitors water pressure and flow and can automatically shut off the supply when it detects a major leak.

What I'd choose for a high-rise

The key issue isn't actually the brand—it's your condo's plumbing configuration. Before buying, confirm that you have access to your unit's dedicated incoming water line and that the HOA/building allows a motorized valve to be installed there. You also want to verify the pipe size, available power, and whether a PRV is present.

For a high-rise, I'd lean toward Moen Flo or YoLink if you want both whole-unit monitoring and additional moisture sensors. Phyn is particularly attractive if you want the most sophisticated whole-line leak analysis.

If you tell me your condo's pipe size (¾", 1", etc.) and whether the unit has its own water meter/shutoff, I can narrow this to the best 2–3 choices and flag any high-rise installation issues.