Phyn Smart Water Assistant

Compiled by SmartHomeWorkflow Research · Phyn · Water Protection & Plumbing · ~$299.99 (Price at the time we researched it, 2026-08-30, from Phyn's own product page — which had turned us away a month earlier and answered this time. It is labelled 'Sale price $299.99' with no regular or original price shown anywhere on the page, so there is no discount percentage or pre-sale figure to record alongside it: $299.99 is the only price the page states. No stock or availability wording (in stock, sold out, backorder) appears on the page at all, so nothing is claimed here about whether you can actually buy it, beyond the price being displayed.)

Exactly which product this is^[1]

Model number: Not established
Generation: Not established
Region this page covers: US
Also sold or listed as: Phyn Assistant · Phyn Smart Water Assistant (under-sink)

“Not established” means we have not sourced that detail yet — not that the product has no model number, generation or regional variant. We publish the gap rather than filling it.

Compatibility

Ecosystem	Support	The catch
Amazon Alexa	PartialPartial support — see the catch^[3]	Query-only, and that ceiling is inherent rather than accidental: this device has no valve, so unlike the Phyn Plus — whose skill can 'turn off my water' — there is nothing here for Alexa to actuate. Setup is the 'Phyn Device' skill plus Phyn account linking, configured from the app's Settings > Smart Home Integrations. Documented commands: 'Alexa, ask Phyn Device for my water status', 'Alexa, ask Phyn Device how much water I used today', 'Alexa, ask Phyn Device how much water I used this month', and for multi-property accounts 'Alexa, ask Phyn Device for my water status at Vacation Home'. Phyn documents no proactive alerting through Alexa — no leak announcement — so the alarm path stays Phyn's own SMS and push notifications.
Google Home	PartialPartial support — see the catch^[4]	Same shape as Alexa and set up the same way — add the device in Google Home, search for Phyn, sign in with Phyn credentials. Slightly more useful in one respect: Phyn documents asking about leaks directly, with the example 'Hey Google, is there a leak in Phyn Water?', alongside device-status checks. Still query-only, with no documented proactive notification. One practical wrinkle Phyn calls out: device names created in Google Home 'exist only in Google Home. They do not change the device names in the Phyn app', so the two apps can disagree about what a device is called.
Apple Home	Doesn't workVerified: does not work with this ecosystem^[2]	No Apple Home route, and the evidence is consistent across two independent readings a year apart in this catalog. Phyn's help centre publishes voice-integration articles for exactly two platforms — Amazon Echo/Alexa and Google Home — with no Apple, HomeKit or Siri article for this product. The sibling Phyn Plus record's 2026-07-19 verification separately established that Phyn's own product pages list only Alexa, Google Home and IFTTT, and recorded the relevant history: Belkin announced a HomeKit-enabled Phyn water assistant in 2019 that never shipped. There is no Matter certification, so no protocol-level fallback exists either.
SmartThings	InconclusiveWe researched this and the evidence doesn't settle it — the catch explains why^[2]	No path was found and the evidence leans toward no, but nothing settles it — the same position we reached for the Phyn Plus, for the same reason. Phyn documents only Alexa and Google Home; on the SmartThings side the only substantive material is an unresolved 2019 community thread noting that Phyn had closed off outside access to its service, and no SmartThings driver is known. A seven-year-old forum thread is not evidence of a current no, so this stays unknown rather than borrowing a firm no it cannot support.
Home Assistant	InconclusiveWe researched this and the evidence doesn't settle it — the catch explains why^[2][5]	Phyn documents no Home Assistant support. A community-built add-on for Phyn exists and is actively maintained — we verified it for the Phyn Plus, where it exposes usage, temperature, pressure, flow and valve control by signing into Phyn's closed service with your account details — but it is not official, and nothing we read confirms it covers the Smart Water Assistant, which is a different kind of device with no valve. We record this as unknown rather than borrowing the answer from the sibling: the same add-on can support one model and not another, and the sibling's own history — a Phyn service change on 2025-06-11 broke it — shows how fragile that route is.

? Inconclusive means we researched that ecosystem and the evidence doesn’t settle it — the catch says why, and the sources are listed below. It is a statement about the available evidence, never a verdict on the product. A Setup Check researches your exact setup where the official sources don’t answer.

Protocols: WIFI^[1]

What it can do^[2][3][4]

You can tell it to

None documented by the vendor

It reports

Water flow
Leak detected

Alexa: Query-only: water status and usage totals. No valve exists to actuate, and no proactive leak notification is documented.
Google Home: Query-only, including a documented leak-status question, but no proactive notification.

Empty actions is the defining fact, not an omission: this device senses and reports, and the water keeps running until a human acts. It is the same distinction that separates this subcategory from water-shutoff-valves, where the Phyn Plus lives.

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality^[11]

✓ Works without a subscription: Yes.

Vendor account required: Yes — you must create a vendor account to use it.^[12]

AFFIRMATIVELY SOURCED FROM THIS PRODUCT'S OWN PAGE as of 2026-08-30, closing the gap the record flagged since 2026-07-29. phyn.com/products/phyn labels one of its features 'NO SUBSCRIPTIONS' and states directly: 'You shouldn't have to pay a monthly fee to do your part in saving our water. The Phyn app and all of its features are free and available to download for iOS and Android.' That supersedes the brand-level basis this record previously leaned on (Phyn's published position on the sibling Phyn Plus, verified 2026-07-19: 'No subscription fees. At Phyn, we believe that your data is yours. We don't charge you a fee to access your water use data.') — this is now this product's own page, read directly, rather than an inference carried from a sibling record. Corroborated by the absence finding already on record: no fee, plan or tier language appears in any Smart Water Assistant help-centre article either.

Maintenance reality^[1][2]

Works without the internet: No — the core function depends on the vendor's servers, so an outage takes it with them.^[1]
A monitor, not a valve — that is the whole point of the model and the difference from the Phyn Plus already in this catalog. It installs under a sink on the main water supply line, clamping TWO sensors to the hot and cold lines rather than cutting into the plumbing, and reads high-frequency pressure waves to infer what is happening across the house. Phyn's stated requirements are specific and worth checking before buying: 'Access to the main water supply line under a sink where the device will be installed', 'An unswitched electrical outlet under the sink where the device will be installed', 'A dedicated 2.4 GHz Wi-Fi network' with 'WPA2-Personal encryption or higher', 'Strong Wi-Fi signal available at the installation location', and — the one that disqualifies homes outright — 'a single-family home or structure with its own individual plumbing system'. App requirements: current Android or one of the previous two versions; current iOS or the previous version. It works with or without a pressure-reducing valve (Phyn publishes a dedicated article on that). Diagnostics: a Plumbing Check test, run from the app with the main shut off, takes roughly 2–5 minutes and is how it finds drips and pinhole leaks. It learns over time — Phyn describes machine learning that becomes more accurate at identifying fixtures and unusual use — which means early readings are coarser than later ones, and usage is presented as ranges rather than exact volumes. Alerts arrive by SMS and push notification. Phyn also documents a home-insurance-discount proof-of-activation process, which is a real, uncommonly useful piece of paperwork.
Security updates: No security-update support date is on record for this model yet. We haven't yet checked whether Phyn publishes one, so this is a gap in our research — not a statement about the manufacturer.

The catch

It is a detector with no hands. Phyn's pressure-wave sensing is the sophisticated part — it can work out which fixture is running and find drips a flow meter would miss, and the Plumbing Check test genuinely locates pinhole leaks — but when it finds a burst pipe it sends a text message and a push notification, and nothing else happens. If you want the water stopped, that is the Phyn Plus, not this. Three installation requirements disqualify homes rather than merely inconvenience them: it must go on the main supply line under a sink, that spot needs an unswitched outlet, and Phyn requires 'a single-family home or structure with its own individual plumbing system' — so apartments and shared-plumbing units are out. It depends entirely on Phyn's servers with no local mode, on a maker whose service we have already watched change in a way that broke a third-party add-on. Ecosystem support is two platforms wide and shallow: Alexa and Google Home can be asked questions but are not documented to announce anything, there is no Apple Home path at all, and Home Assistant support for this specific model is unconfirmed. Accuracy also improves over time rather than arriving complete, since the fixture identification is learned — and usage is shown as ranges rather than exact figures. One genuine bonus: Phyn documents a proof-of-activation process for home-insurance discounts.

Who it's for

A fit for a single-family homeowner who wants serious leak intelligence — fixture-level attribution, drip and pinhole detection, a diagnostic test that can be run on demand — without cutting into plumbing or hiring a plumber, and who is content to be alerted rather than protected. Good where the main line is accessible under a sink and there is an outlet there, and worthwhile if your insurer offers a discount for an active water monitor. Look elsewhere if you want automatic shutoff (the Phyn Plus does that), if you live in an apartment or share plumbing, if you need Apple Home, if you want alerts that survive an internet outage, or if you want the data exposed to Home Assistant with any certainty.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

[1] helpcenter.phyn.com/help/phyn-smart-water-assistant-requirements (first-party help centre), read 2026-07-29 — vendor-page research, verified 2026-07-29
Backs: Maintenance, Protocols, Required hub or bridge, Product identity, Works without the internet
[2] helpcenter.phyn.com/help/phyn (first-party help centre, Phyn Assistant product section), read 2026-07-29 — vendor-page research, verified 2026-07-29
Backs: Maintenance, Market availability, Capabilities, SmartThings compatibility, Home Assistant compatibility, Apple Home compatibility
[3] helpcenter.phyn.com — 'Can I connect my Phyn Smart Water Assistant device to my Amazon Echo and use Alexa voice commands?', read 2026-07-29 — vendor-page research, verified 2026-07-29
Backs: Amazon Alexa compatibility, Capabilities
[4] helpcenter.phyn.com — 'Can I Connect My Phyn Smart Water Assistant to Use Google Home Voice Commands?', read 2026-07-29 — vendor-page research, verified 2026-07-29
Backs: Google Home compatibility, Capabilities
[5] home-assistant.io/integrations/phyn — HTTP 404, checked 2026-07-29 (no core Home Assistant Phyn integration exists) — ecosystem-page research, verified 2026-08-15
Backs: Home Assistant compatibility
[6] phyn.com/products/phyn — the page that would settle price, model number and a product-specific subscription statement. Returned HTTP 429 (Retry-After: 60) on both attempts 2026-07-29; the wait was honoured once and the host still refused, so it was left alone per fetch-conduct rule 1 and filed in the host-conduct register. Nothing in this record rests on its content. — vendor-page research, verified 2026-07-29
[7] Phyn's cloud is operating: the help centre documents live Alexa and Google Home account-linking flows against Phyn accounts, and the Phyn app is the alerting path. Inference from active service documentation, not a vendor commitment about service lifetime. — migrated hand stamp, verified 2026-07-29
Backs: Service status
[8] phyn.com/products/phyn and helpcenter.phyn.com's Android setup-and-pairing article for this model, both read 2026-08-30 — the pass that established price, a product-specific subscription statement, and accountRequired, replacing the migrated placeholder this entry used to carry. — vendor-page + vendor-support-doc research, verified 2026-08-30
Backs: Research status
[9] helpcenter.phyn.com, 'Phyn Smart Water Assistant Requirements' — vendor-support-doc research, verified 2026-08-17
Backs: Power source
[10] No source was read for this entry. It classifies evidence this record already carries, and records the classification so it is not re-derived. — classification pass over `none` integration cells (doc-16 #453) — reading only, no source fetched, verified 2026-08-22
[11] phyn.com/products/phyn (first-party product page), read 2026-08-30 — vendor-page research, verified 2026-08-30
Backs: Price, Market availability, Subscription
[12] helpcenter.phyn.com — 'Android Setup & Pairing – Phyn Smart Water Assistant', read 2026-08-30 — vendor-support-doc research, verified 2026-08-30
Backs: Vendor account required
[13] helpcenter.phyn.com — 'Phyn Smart Water Assistant Requirements' (stamped 26 Feb 2026) and phyn.com/products/phyn, both read 2026-08-30 — vendor-page + vendor-support-doc research, verified 2026-08-30
Backs: Service status
[14] helpcenter.phyn.com — 'Phyn Smart Water Assistant Requirements', read 2026-08-30. No new fact established; this entry records a reading that was refused. — vendor-support-doc research, verified 2026-08-30
[15] the record's own customer-facing prose fields as they stood before 2026-09-05 (no new external read) — consumer-translation pass (07 §2A.12) — customer-facing prose rewritten to the three-layer rule; NO FIELD VALUE, LEVEL, PATH OR TRANSPORT CHANGED. The research trail that used to sit inside those fields is preserved here verbatim., verified 2026-09-05

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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