OnSite PRO · FS3/4NPT-V4 / 20001
Ready to buy
The retained reference is $202.85 current U.S. retail reference. Confirm V4 controller and 20001 package, seller authorization, valve connection and sensor and power contents before purchase. Commission sensing, closure, manual recovery, alarms and every configured notification before relying on the installation.
Current market
Each line carries its own check date because price, software, specifications, and product cycle do not age at the same speed.
Confirm V4 controller and 20001 package, seller authorization, valve connection and sensor and power contents before purchase. Confirm current stock, seller authorization, tax, delivery, fittings, valves, sensors, hubs, backup power, subscription, labor, permits and return terms before paying.
Water Heater FloodStop is the straightforward appliance-level alternative when a local sensing strip and one cold-supply valve are enough and connected alerts are unnecessary.
Other paths
These are not generic competitors. Each one represents a different way to buy into the same market.
Taco Comfort Solutions
OnSite PRO
What changed
Older observations stay in the ledger when the current view changes. That lets a buyer tell the difference between an old complaint, an active issue, and a problem that was corrected.
FloodStop Water Heater 3/4 NPT V4 was checked against manufacturer identity and support, current U.S. price, sensing and valve hardware, pipe and installation fit, power, connection and service, independent evidence and bounded owner or installer reports.
Each amount stays tied to its source and capture date. Conflicting prices remain visible until the seller resolves them.
Current reference priceA structured timeline will begin with the next source capture
Owner experience
Owner and installer evidence centers on valve installation, monthly cycling, wet trips, seized units, battery setup and warranty response rather than a universal detection or prevention result.
These are self-reported or retailer- and manufacturer-presented experiences across different pipes, valves, pressure, water quality, sensors, power, networks, accounts, settings, installations, maintenance and leak events. They identify commissioning and service checks and do not establish standardized sensitivity, closure time, notification delivery, runtime, reliability, failure rate, flood or freeze prevention, safety, code approval, insurance eligibility, coverage or claim outcomes.Verified owners report installation, successful trips, frozen or failed units and warranty contacts. The small self-selected sample is useful for checks, not failure rates.
Wet-test at the real pan and verify manual recovery after AC and battery loss, then schedule inspection around the monthly exercise.
1 evidence recordSources
The page separates what a source states directly from what we conclude across sources.
OnSite PRO identifies FS3/4NPT-V4 / 20001 as a local automatic shutoff with one lead-free ball valve, sensing strip, alarm, monthly valve exercise and battery option.
$202.85 current U.S. retail reference was retained for FS3/4NPT-V4 / 20001. Confirm V4 controller and 20001 package, seller authorization, valve connection and sensor and power contents before purchase
One 3/4-inch lead-free motorized ball valve closes the water-heater cold supply after the wired sensing strip gets wet; it does not monitor whole-home flow or detect water that misses the strip Local wet detection closes the valve, sounds an alarm and requires inspection and reset; stored tank water, gravity drainage and other supplies can continue releasing water after closure Install between the manual shutoff and water heater with correct direction and a qualified plumbing review of expansion tank, vacuum breaker, pan, drain and code; isolate heater energy and beware hot water during any leak
The V4 control accepts AC and four AA batteries, but batteries are a bounded backup whose condition must be checked; manual cold-supply isolation remains required for service The base V4 retained here has no Wi-Fi, cloud, subscription or remote notification; optional relay or third-party integrations introduce their own monitoring, privacy and service boundaries Observe the monthly valve cycle, wet-test the strip, replace batteries and inspect the valve and pan; the one-year warranty does not remove sensor, frozen-valve, controller, tank-inventory or drain failures
EPA guidance emphasizes finding and repairing the physical leak. Monitoring or shutoff equipment does not itself repair pipe, fixture, appliance, drain or water intrusion.
Backflow and cross-connection control are plumbing-system and public-health functions. A smart valve does not replace required devices, testing, permits or local authority decisions.
Connected-device users should review app permissions, accounts, data collection, security and deletion. A local valve function does not remove cloud-data and notification boundaries.
Flood coverage and claims depend on policy, peril, documentation and event facts. Owning a detector or automatic valve does not guarantee coverage, a discount or payment.
Independent professional-market coverage maintains exact package, valve, sensor and current availability and exposes owner feedback alongside manuals.
Verified owners report installation, successful trips, frozen or failed units and warranty contacts. The small self-selected sample is useful for checks, not failure rates.
LeakBreaker Water Heater Shut-Off is the appliance-level automatic shutoff alternative at $220.26 current U.S. retail reference.
FloodStop Washing Machine 3/4 H90 V4 is the appliance-level automatic shutoff alternative at $286.72 current U.S. street reference.
Manufacturer identity, exact current U.S. price, current specification, manual or support, independent editorial, test or professional-market evidence and bounded owner or installer evidence were checked on August 18, 2026. This desk covers supported complete residential whole-home flow or pressure monitors, motorized main shutoff systems, retrofit valve controllers with a coherent sensor branch, alert-only whole-home monitors and appliance-level automatic shutoff systems. It excludes loose sensors outside a coherent supported branch, standalone valves or actuators without the required controller, unsupported marketplace hardware, irrigation-only valves, commercial-only BMS, obsolete products and cosmetic multipacks or bundles. Sensor type and placement determine what can be observed. Flow, pressure-wave, utility-meter, clamp-on ultrasonic and direct-water sensors have different thresholds and blind spots. Valve size, connection, full-port geometry, direction, straight-run needs, pressure and temperature rating, potable-water approval, meter, PRV, well, treatment, irrigation, fire branch, thermal expansion, check valve and backflow placement are site facts. Alert-only systems never stop water. Automatic systems depend on configuration, learning, detector coverage, valve operation and available power. AC, batteries, backup modules and manual overrides have separate limits, and an internet-offline claim is not an electrical-outage claim. Apps, Wi-Fi, hubs, accounts, cloud analytics, subscriptions, monitored service, notifications, firmware and integrations have privacy, security, retention, outage, ownership-transfer and provider-continuity boundaries. Use qualified plumbing and electrical work and required permits, inspections and backflow review. Isolate electrical and water energy before service. Do not touch wet energized equipment. Hot water, contaminated floodwater, sewage, sewer backup, mold, frozen pipe, roof, drain, groundwater and water already stored in an appliance or tank can remain after a valve closes. Fix the source, dry and remediate materials and use emergency, utility, plumbing, electrical, public-health and insurance guidance. Product ownership or an insurer program does not guarantee a discount, eligibility, coverage or a claim. No sensor, valve, algorithm, test, alarm, app, cloud, battery, subscription, plumber, warranty or installation guarantees leak detection, automatic closure, flood or freeze prevention, notification, runtime, reliability, service life, mold prevention, property protection, code or permit approval, insurability, coverage or an insurance outcome.
Researching another model?