Phyn uses advanced leak detection and self-learning AI to help protect your home. Below is a guide to the different Leak Alerts, what they mean, and what to do when you receive one.
How Phyn learns your home’s water use
Phyn starts with default alert thresholds based on typical household water use. Over time, it builds a home-specific model that adapts to your unique usage patterns.
Initial learning typically takes about 21 days
Thresholds adjust automatically:
Higher ongoing usage → higher thresholds
Lower ongoing usage → lower thresholds
Phyn continues learning nightly based on the last 24 hours of activity
This helps reduce false alerts while improving leak detection accuracy.
Low Flow Alert
What it means
Phyn detected unusual low water flow that lasted at least 20 minutes and used about 6 gallons of water. These thresholds may change as Phyn learns your home.
What to do
Check for:
Dripping or partially open faucets
Outdoor spigots left on
A leaking toilet flapper (a common cause)
If Auto Shutoff is enabled:
You’ll receive a second alert 10 minutes later
If you don’t respond within 15 minutes, Phyn will shut off your water
Troubleshooting tips
Look for active alerts in the Alerts section of the app
Active = water use is ongoing
Resolved = water use has stopped
If needed, run Plumbing Checks to isolate the source by turning fixtures off one at a time
Ultra-Low-Flow Alert (Phyn Plus only)
Phyn Plus can now detect ultra-low-flow events—as low as 0.01 gallons per minute—in near real time.
Why this matters
Detects very small leaks sooner
Helps prevent long-term water waste and damage
Improves troubleshooting without waiting for overnight checks
In rare cases, factors like plumbing noise or intended ultra-low-flow activities may trigger alerts.
Medium Flow Alert
What it means
Phyn detected unusual water flow lasting at least 20 minutes and using about 60 gallons of water.
Common causes
Leaking toilet flapper or stuck chain
Water heater temperature & pressure (T&P) valve leak
Overflowing water heater drip pan
If Auto Shutoff is enabled:
Second alert after 5 minutes
Water shuts off if there’s no response within 5 minutes
What to do
Inspect toilets and water heater
Run Plumbing Checks to narrow down the source
Contact a plumber if the source isn’t obvious
High Flow Alert
What it means
Phyn detected very high water flow, lasting at least 3 minutes or using 50 gallons or more.
Common causes
Broken pipe
Burst or damaged supply line (washing machine, ice maker)
Occasionally, irrigation or pool filling (especially during early learning)
If Auto Shutoff is enabled:
Second alert after 2 minutes
Water shuts off if there’s no response within 2 minutes
What to do
If you’re home, look and listen for running water
If you’re unsure of the cause, turn off the water in the app immediately
Contact a plumber right away
Not a leak? Help Phyn learn
If you know the alert was caused by normal water use:
Open the alert in the Phyn app.
Tap Tell Us.
Select the correct activity.
Your feedback helps Phyn learn faster and reduces future alerts.