Across the country, carriers are quietly changing what it takes to get and keep a policy.

A new program announcement from Mercury Insurance, a California homeowners carrier, marks one of those "gradually, then suddenly, all-at-once" industry moments, and independent agencies are already alerting clients to what's coming.

Homeowners insurance is being rewritten in real time, and most policyholders will be blindsided.

Smart water devices are moving from optional discount item to required equipment, from wealth-segment underwriting into mass-market admitted coverage.

The common thread is no longer "How much coverage do you want?" but "What should be in place to prevent a loss before it happens?"

The predict-and-prevent era of homeowners insurance has officially arrived.

Here's why it's happening, what it looks like, and what homeowners need to know before the next renewal letter shows up.

What Mercury's program signals about where carriers are headed

Mercury's rollout follows a pattern that's now taking shape across the industry:

Program requirements that zero in on the homes carriers identify as highest risk for non-weather water losses, including older homes, higher-value homes, secondary and seasonal residences, and homes in geographies with elevated non-weather water risk.

Mercury names three qualifying device categories, which are whole-home water flow monitoring, smart or centrally-monitored leak detection and shutoff, and smart point-of-leak sensors. For secondary or seasonal homes with a Coverage A limit of $2 million or more, Mercury requires automatic shutoff specifically, not just detection. The program is active across ten states: AZ, CA, GA, IL, NJ, NV, NY, OK, TX, and VA.

Mercury is not the first carrier to require water devices. Chubb, PURE, Private Client Select, and Vault have required or strongly incentivized them on high-value homes for years.

State Farm directs California policyholders toward a list of approved leak detection and shutoff vendors, and has moved from incentive to requirement on higher-value homes per industry reporting. Farmers has been requiring devices on older California homes for several years.

These requirements are no longer just for the wealth-segment and catastrophe-exposed, and are now impacting mass-market homeowners coverage.

It's no surprise — but now it's happening surprisingly fast

Insurance leaders have been saying for more than a decade that the future of the business is a shift from repair and replace to predict and prevent.

In 2018, Chubb Chairman and CEO Evan Greenberg told CNBC's Mad Money that the product of insurance (repairing and replacing after a loss) was going to move toward predicting and preventing, powered by data and the Internet of Things.

It might have sounded far-off and visionary at the time. It was a near-term plan.

Greenberg wasn't speaking alone. Nationwide's President of Personal Lines Casey Kempton has made the same argument repeatedly, framing predict-and-prevent as the industry's path out of the loss-ratio pressures that have defined homeowners insurance since 2020. McKinsey's Insurance 2030 research named connected water devices as a flagship use case. Insurance Thought Leadership has been writing about the shift for years.

The consensus was wide, even if the mechanism was missing. Water programs are that missing mechanism finally appearing, and they're becoming standard practice across markets.

We can't afford non-weather water losses anymore

Water damage and freezing combined account for roughly 22.6% of all homeowner insurance claims, according to the Insurance Information Institute's most recent compilation of ISO and Verisk data. Average claim severity has climbed to approximately $15,400.

Chubb's own research has found that more than 50% of American homeowners have experienced a water leak in the past two years that produced more than $5,000 in cleanup and repair costs.

Mercury's public communications around their new program disclosed that more than 40% of a typical California home's premium is attributable to non-weather water peril.

A single category of loss makes up an enormous share of a homeowner's premium. Unlike wildfire or hurricane exposure, non-weather water damage is largely preventable — if the right intervention happens before the loss.

The pressure on carriers to act has only intensified. Home replacement costs rose roughly 55% between 2020 and 2022. Reinsurance markets hardened after 2022, making non-catastrophe losses increasingly painful for primary carriers to absorb. Carriers have watched a category of loss that used to be manageable become the category they can no longer absorb. Homeowners have watched their premiums rise every year and wondered why.

Water — plumbing failures, burst pipes, supply line leaks, appliance failures — is the single largest controllable peril sitting inside homeowners insurance, and the only lever carriers have left to meaningfully move loss ratios without raising rates or pulling out of markets.

That's why water programs are appearing now. And why they're appearing everywhere.

Water programs are all different, but all rhyme

New programs are being designed differently carrier-to-carrier, but all have a similar structure. A quick tour shows how carriers are proactively and reactively responding to non-weather water losses with their members.

Mercury Insurance has rolled out a program structured around tiered thresholds by coverage amount and home age, stricter rules for secondary homes, and three approved device categories, with qualifying devices required before first renewal for eligible new policies.

Chubb, whose Masterpiece homeowners program has long been the benchmark in high-net-worth coverage, runs a preferred-device program with discounts ranging 3 to 12% and engineering requirements for larger homes. Chubb also reimburses policyholders up to $5,000 to install a water leak detection and shutoff system after a covered water damage claim.

PURE Insurance, the reciprocal insurer serving high-net-worth members, offers up to 5% off homeowners premium for installing an automatic shutoff device. PURE has publicly disclosed that water damage claims account for nearly 50% of all homeowners claims among its membership, and that members displaced by water damage are out of their homes for an average of 100 days.

USAA operates a Connected Home program that partners with Resideo and Roost to distribute WiFi-connected water leak detectors across its roughly 13 million members, with discounts available when members install approved devices and share data with USAA.

Nationwide offers policyholders 15% off the cost of their partner's smart water products and has positioned leak prevention as a central pillar of its Smart Home program.

The pattern holds beyond these four. State Farm, Farmers, Cincinnati, Travelers, Allstate, Liberty Mutual, American Family, Hanover, Vault, Berkley One, and Amica all have programs in some form. Private Client Select has even published nine years of its own data showing more than 92% of customers who installed a whole-house shutoff would do it again.

A consistent industry standard is taking shape, with three recognized device categories, a tiered escalation from discount to mandate, and a trajectory that is moving from secondary homes to primary residences, from high-value homes to mass-market homes, and from discount incentive to policy requirement.

Where are the water devices that predict and prevent?

The first generation of approved devices started chipping away at this problem decades ago.

These are the flow monitors that tracked household water use, automatic shutoff valves that closed the main line when something went wrong, and point-of-leak sensors placed under sinks and behind toilets. They gave homeowners and carriers key capabilities they didn't have before. They even generated some of the loss-prevention data that has informed the carrier programs appearing today.

But these solutions are detection-first, not prevention-first.

As carriers shift from "repair and replace" to "predict and prevent," water protection systems need to evolve from reactive detection and intervention to automated prevention and proactive protection.

Detection asks whether a leak has started. Prevention asks what's making a leak likely in the first place.

For residential water, the primary upstream condition is pressure stabilization. Peer-reviewed research has repeatedly linked pressure variability to pipe failure rates, and the Uniform Plumbing Code requires pressure regulators be installed when incoming pressure runs high, for exactly this reason.

However, the static, analog pressure regulators installed in most homes are failure-prone and cannot dynamically regulate water pressure. Many homeowners only realize their pressure regulator isn't working properly when something else breaks.

The biggest source of stress on a home's plumbing system isn't managed at all by the water devices on the market today.

Pressure is the upstream mechanical problem. There's also an upstream human one.

What we know from the first generation of carrier programs show that many losses are in homes where water devices were installed but where the homeowner had unplugged their device. The most commonly cited causes: hair-trigger water shutoffs, too much manual programming, too much homeowner intervention required, and too many alerts.

The next generation of water protection systems needs to factor human behavior into the system design, not just root-cause prevention.

A predict-and-prevent-era device has to address the full picture, not one slice of it.

• It has to regulate pressure dynamically, rather than relying on a static valve installed once during construction and never looked at again.
• It has to distinguish real anomalies from normal household patterns well enough that homeowners trust it and leave it on.
• It has to provide freeze protection in cold-climate states, where frozen pipes are the single most destructive water event a home can experience.
• And it has to deliver fleet-level telemetry back to the carrier, with real, per-home risk data that underwriters can use to price and manage risk intelligently.

It's this kind of product architecture that this new era of carrier programs needs to work.

What to expect before your next policy update

Most of us will be reading "your insurance policy may soon require a water device" with a quiet groan. And it's a fair reaction.

Nobody wants more requirements, more apps, more subscriptions, or more things on the wall demanding attention. Homeowners are already managing more smart-home complexity than they ever wanted to. The last thing most homeowners want is one more box making more demands on the family.

But the alternative is worse.

The alternative — the one homeowners have been quietly living with for years — is rising premiums with no recourse, generic non-renewal letters that leave homeowners guessing at what went wrong, higher deductibles, water sublimits that cap coverage at a fraction of actual exposure, and in the worst cases, being forced into the non-admitted market where the same coverage that cost $5,000 a year suddenly costs $25,000 or more.

Here is what homeowners should know and expect in this new era:

1. If you hold a homeowners policy in California, Florida, or another high-non-weather-water-risk state, expect water-device language to appear in your renewal documents within the next one to three years, if it hasn't already.
2. If your home has a replacement cost above $2 million, expect it sooner.
3. If you hold coverage with a high-net-worth carrier, the requirement is very likely already embedded in your engineering letter, whether or not you've read it.
4. If you own a secondary, vacation, or seasonal home, expect automatic shutoff to be required.
5. If your home is 30 years old or older, expect the requirement thresholds to apply at lower coverage amounts.

Our advice: When your next renewal conversation comes around, ask your broker what water-device requirements apply to your policy today, what's expected to apply at your next renewal, and which device categories qualify. If you own multiple properties or a higher-value home, ask whether a sublimit on water damage has been applied to your policy and what it would take to remove it. Ask whether installing a qualifying device affects your premium, your deductible, or both.

The homeowners who treat this shift as something to get ahead of will end up on the better end of it. The homeowners who wait will end up with fewer options and less time.

What good recommendations will look like in this new era

A policy requirement is only as good as the hands that translate it into a real installation in a real home.

The carrier rules appearing now (i.e. your home needs a qualifying device before first renewal) are going to be implemented, practically, by a small but growing network of specialty consultants, plumbers, and water-risk advisors.

Firms like Beagle Services and Water Security Solutions have been doing this work for high-net-worth carriers for years. Independent plumbing contractors are getting pulled into the conversation as mass-market carriers follow suit.

Insurance brokers are increasingly expected to not just name a requirement, but point to someone who can actually meet it. The quality of the recommendations these consultants make is going to determine whether the predict-and-prevent era succeeds or stalls.

A good recommendation in this era has to do two things at once.

1. It has to actually solve the risk problem — meaning address pressure, detection, shutoff, freeze, and the carrier's telemetry requirements in one coherent installation, rather than stacking three single-function devices that don't talk to each other.

1. And it has to not make life worse for the people living in the home. No homeowner wants three apps, three sets of alerts, three firmware update cycles, or three devices that each fail differently.

The consultants, plumbers, and brokers who build their practices around this standard — solve the risk problem completely, without adding friction to the household — are the ones who will define how homeowners experience the next decade of insurance. They are also the ones carriers will come to trust as the category matures.

The ones who chase the cheapest box that clears the policy requirement will be having a much harder conversation in three years, when the losses continue and the carriers start asking why.

Where this is going

Water is where the predict-and-prevent era started because water is where the loss math forced the industry's hand first. It won't stop there.

The same architecture of prevention requirements tied to underwriting eligibility, telemetry-driven risk assessment, and category-specific intervention is coming for other perils. This includes fire sensors, electrical anomaly detection, freeze monitoring, storm-resilience verification. Every controllable loss category sitting inside homeowners insurance is now on the table.

The question isn't whether the architecture of homeowners insurance is changing. It's whether the devices, the carriers, the consultants who implement them, and the homeowners who live with them are ready for what the next decade of predict-and-prevent actually requires.

This industry update was written by Namara. Our first-of-its-kind water protection system was purpose-built to automatically prevent the damage and waste that water creates in homes. It's the only whole-home system that combines dynamic pressure stabilization, automated shutoff, freeze protection, and water savings — while delivering the real-time, per-home risk intelligence carriers need. Learn more about what we’re building at namarawater.ai.

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