No cables, adapters, or hubs required. The Sump Pump Monitor plugs directly into a standard 120V wall outlet.
The PumpFuse Sump Pump Monitor is a smart plug that watches your sump pump's power consumption and automatically detects problems — dry runs, blockages, stuck switches, rapid cycling, and inactivity. When it detects a dangerous condition, it can cut power to the pump to prevent motor damage.
┌──────────────┐
Wall Outlet ──── │ Sump Pump │ ──── Sump Pump Power Cable
(120V) │ Monitor │
└──────────────┘The device works entirely on your local network. There is no cloud service, no account to create, and no subscription fee.
| Input Voltage | 120V AC, 60 Hz |
| Max Load | 10A / 1200W |
| Dimensions | 2.24" × 2.24" × 2.24" (57 × 57 × 57 mm) |
| Weight | Approximately 2 oz |
| WiFi | 2.4 GHz 802.11 b/g/n, mDNS (.local hostname) |
| Setup | Bluetooth 5.0 (initial pairing only) |
| Indicators | Blue LED (connectivity), Red LED (product status) |
| Button | Multi-function (press, double-press, long-hold) |
| Power Monitoring | Built-in BL0937 — ~1 sample per second |
| App | PumpFuse — free for iOS and Android |
| Cloud Required | No |
| Subscription | No |
Important: The Monitor connects to 2.4 GHz WiFi networks only. It does not support 5 GHz networks. Most routers broadcast both — use the 2.4 GHz network name during setup.
Insert the Sump Pump Monitor into a wall outlet near your sump pit. If needed, use a heavy-duty extension cord to reach the outlet. The blue LED will start blinking — this means the device is ready to be set up.
Plug your sump pump's power cord into the Monitor's outlet. Your pump should continue to operate normally — the Monitor starts in a pass-through state with power always on.
Download the free PumpFuse app from the App Store (iOS) or Google Play (Android).
When the blue LED turns solid, your Monitor is connected to WiFi and watching your pump. The app will show a "Learning" status.
The device needs to observe a few pump cycles (typically 3–10) to learn your pump's normal power signature. During this time:
You don't need to do anything. Just let your pump run its normal cycles. Most pumps reach full protection within 1–2 days.
💡 Tip: If you ever reinstall the app or want to check the device from another phone, use "Find on Network" instead of "Add Device" — no Bluetooth needed for devices already on your WiFi.
The Monitor has two LEDs that tell you what's happening at a glance.
📝 Note: The device typically lives in a basement near the sump pit, so LED visibility is limited. The app and Home Assistant notifications are the primary way to stay informed.
| What You See | What It Means |
|---|---|
| Blinking | Setting up or reconnecting to WiFi |
| Solid | Connected to WiFi and working normally |
| Off | Device is in recovery mode (see Troubleshooting) |
| What You See | What It Means |
|---|---|
| Off | Everything is fine — pump is idle, no issues detected |
| Blinking | Pump is running — normal operation |
| Solid | An alert is active — check the app for details |
| Blue | Red | What's Happening |
|---|---|---|
| Solid | Off | Normal — pump is idle, monitoring active |
| Solid | Blinking | Pump is running — this is normal |
| Solid | Solid | Alert active — a problem was detected. Check the app. |
| Blinking | Off | Setting up or reconnecting to WiFi |
Once set up, the Sump Pump Monitor runs completely automatically. Here's what happens behind the scenes:
Every sump pump is different — different motors, different water loads, different cycle lengths. Instead of asking you to enter wattage thresholds or timing values, the Monitor learns by watching:
This learning process uses statistical analysis to determine when it has enough confidence in its baselines. Once ready, protection arms automatically — no action required from you.
| Problem | What's Happening | What It Does |
|---|---|---|
| Low Power (dry run) | Pump is drawing significantly less power than normal — likely running without water, which can burn out the motor | Alerts you. Can cut pump power (on by default). |
| High Power (blockage) | Pump is drawing significantly more power than normal — likely a blocked discharge pipe or seized bearing | Alerts you. Can cut pump power (off by default). |
| Excessive Run | Pump has been running much longer than usual — possibly a stuck float switch | Alerts you. Can cut pump power (off by default). |
| Short Cycling | Pump is turning on and off rapidly — could indicate a check valve problem or float switch issue | Alerts you (detection off by default). |
| Inactivity | Pump hasn't run in longer than expected — could mean it's stuck, disconnected, or water isn't reaching the pit | Alerts you (detection off by default). |
Additionally, the Monitor detects power outages — if the device loses power and comes back on, it records the outage duration.
For the three most critical problems (low power, high power, and excessive run), the Monitor can cut power to the pump to prevent damage. This is what makes it different from a simple power monitor.
Here's what happens when a problem is detected:
The Monitor's primary job is flood prevention — keeping your pump running. If it keeps detecting a problem and cutting power, at some point the risk of the basement flooding (pump off too long) outweighs the risk of pump damage (pump running with an issue). After exhausting retries, it lets the pump run and asks you to investigate.
If your sump pump line also powers a battery backup charger (drawing a constant 50–100 watts), the Monitor handles this automatically. It learns two power levels — the charger's constant draw (idle) and the pump's draw (active) — and sets thresholds based on the difference. No configuration needed.
Open the PumpFuse app to see your Monitor's status and control it from your phone.
Requirement: Your phone must be connected to the same WiFi network as the Monitor. The app communicates directly with the device over your local network.
The main screen shows all your PumpFuse devices. Each Monitor displays:
.local hostname (e.g., pumpfuse-ab12.local)Tap a device to open its detail page.
The detail page is a single scrollable screen with everything you need:
A color-coded circle at the top shows the current state at a glance:
| Color | Label | Meaning |
|---|---|---|
| 🟢 Green | MONITORING | Normal — pump is healthy, protection is active |
| 🟢 Green | MONITORING | Learning mode — still building baselines (yellow chip below shows progress) |
| 🔴 Red | ALERT | A problem was detected — check the alert details below |
| 🔴 Red | LOCKOUT | Pump power was cut — relay is held open during cooldown |
Below the circle, a state line always shows the pump's physical state:
A mode chip below that shows the protection mode:
A horizontal bar chart showing pump activity over the last 24 hours. Each bar represents a 5-minute window. Blue intensity indicates how long the pump ran in that period:
Red underlines below the chart mark alert periods. Vertical red ticks mark power outages. A small triangle marks local midnight.
Four key numbers at a glance:
| Stat | Primary Value | Secondary Value |
|---|---|---|
| Avg Power | Learned baseline (e.g., "780 W") | Last run power |
| Avg Run Duration | Mean across all cycles (e.g., "34s") | Last run duration |
| Runs Last 24h | Count from activity chart | Total runs lifetime |
| Avg Interval | Mean time between runs (e.g., "~6h") | Time since last run |
During learning, "Avg Power" shows "Learning…" until baselines stabilize.
Details about the most recent pump cycle:
A list of alert incidents (newest first). Each row shows:
Tap any row to see full details in a bottom sheet.
If no alerts have occurred: "No alert history"
| Action | What It Does |
|---|---|
| Configure | Opens pump settings (see Adjusting Settings) |
| Device Settings | Rename device, configure MQTT, update firmware, view device info |
| User Manual | Opens this manual in your browser |
| Reset Lockout | Restore pump power, re-enable protection, reset shutoff counter (only visible when needed) |
| Reset Statistics | Zero all counters, clear alert history, and restart learning from scratch |
Open ⋮ → Configure to customize the Monitor's behavior.
📝 Note: The default settings work well for most sump pumps. If you're not sure what to change, leave them as-is. The Monitor is designed to work with zero configuration.
Each alert type has an on/off toggle. When an alert is enabled, the Monitor watches for that condition and reports it in the app, via MQTT, and through the LED.
| Alert | Default | What It Detects |
|---|---|---|
| Low Power Detection | On | Dry run — pump running without water, or broken impeller |
| High Power Detection | On | Blockage — clogged discharge pipe or seized bearing |
| Excessive Run Detection | On | Stuck float switch — pump won't turn off |
| Short Cycling Detection | Off | Rapid on/off — check valve or float switch issue |
| Inactivity Detection | Off | Pump hasn't run when expected — could be stuck or disconnected |
For the first three alerts (Low Power, High Power, Excessive Run), you can enable "Cut pump power" — when the Monitor detects the problem, it cuts electricity to the pump to prevent motor damage.
| Setting | Default | Note |
|---|---|---|
| Low Power → Cut pump power | On | Dry runs are the most damaging failure mode |
| High Power → Cut pump power | Off | Blockages may resolve on their own |
| Excessive Run → Cut pump power | Off | Long runs may be legitimate during heavy storms |
These settings appear when any "Cut pump power" toggle is on. They control how the automatic power cutoff behaves:
| Setting | Default | Range | What It Does |
|---|---|---|---|
| Lockout Duration | 10 minutes | 1–480 min | How long the pump stays off after a problem is detected. Shorter = pump recovers faster (better for flooding risk). Longer = fewer power cycles (better for motor/relay longevity). |
| Max Retries | 3 | 1–10 | How many times the Monitor will cut and restore power before giving up. After this many shutoffs, protection disables itself and the pump runs freely until you investigate. |
When Inactivity Detection is enabled, a slider lets you set how long the pump can be idle before an alert fires:
| Setting | Default | Range |
|---|---|---|
| Inactivity Window | 5 days | 1 minute – 30 days |
This is highly dependent on your situation — pumps in wet basements may run several times a day, while pumps in dry climates may go weeks between cycles.
If the device is still learning your pump (hasn't built confident baselines yet), a banner appears at the top of the settings screen:
ⓘ Device is still learning your pump. Alerts will activate once baselines stabilize.
You can still configure all settings during learning — they'll take effect the moment the device arms protection.
The Monitor has three protection modes, shown as a colored chip on the main screen:
The device is observing your pump and building statistical baselines. This happens automatically after setup and typically takes 3–10 pump cycles (usually 1–2 days).
During learning:
You don't need to do anything. The Monitor transitions to Protected automatically once it has enough data.
Baselines are established and alerts are armed.
The pump hasn't run in a while and the inactivity alert fired. Protection drops to learning-level alerts until the next pump cycle confirms the baselines are still valid.
This is a normal state for pumps in dry seasons. Once the pump runs again, the device returns to Protected automatically.
The Monitor has a single button on the device for physical access without the app.
| Action | How To | LED Feedback | What Happens |
|---|---|---|---|
| Reset Lockout | Press the button once (quick press) | Red LED blinks once | If lockout is active: restores pump power, re-enables protection, resets shutoff counter. If no lockout: no effect. |
| Reset Lockout | Press the button twice quickly (double press) | Red LED blinks twice | Same as single press — restores pump power and resets protection |
| Re-pair WiFi | Hold the button for 3 seconds | Blue LED starts blinking | Enters Bluetooth pairing mode so you can set up a new WiFi network via the app |
| Factory Reset | Hold the button for 10 seconds | Red LED turns solid for 1 second, then device restarts | Erases all settings, learned baselines, and history. Restarts as a new device. |
📝 Note: The device typically lives in a basement near the sump pit. The button is a last resort for physical intervention — the app and Home Assistant are the primary interfaces. During a lockout, the quickest way to restore pump power is pressing the button once.
| Problem | Solution |
|---|---|
| Device not found during setup | Make sure Bluetooth is enabled on your phone. Make sure the device is plugged in and the blue LED is blinking. Move your phone closer to the device. If the blue LED is solid (not blinking), hold the button for 3 seconds to re-enter pairing mode. |
| WiFi won't connect during setup | The Monitor only supports 2.4 GHz WiFi. If your router has separate 2.4 GHz and 5 GHz networks, make sure you enter the 2.4 GHz network name. Double-check the password — it's case-sensitive. |
| App says device is offline | Make sure your phone is on the same WiFi network as the Monitor. The device must be powered on and within WiFi range of your router. You can also try reaching the device by its .local hostname (e.g., http://pumpfuse-ab12.local) in a browser. |
| Blue LED blinking (not connecting) | The device is trying to connect to WiFi. If it keeps blinking for more than 2 minutes: check that your router is on, your WiFi password hasn't changed, and the Monitor is within WiFi range. If needed, hold the button for 3 seconds and re-pair through the app. |
| Red LED solid | An alert is active. Open the app to see which alert fired and what action was taken. If the pump's power was cut, press the button once or use the app to reset the lockout. |
| Still in "Learning" after several days | The Monitor needs to observe pump cycles to learn. If your pump hasn't run recently (dry season, low water table), learning will take longer. You can trigger a manual cycle by pouring water into the sump pit. The Monitor typically needs 3–10 cycles. |
| "Protection Disabled" showing in app | The Monitor cut pump power multiple times for the same problem and gave up to avoid excessive relay cycling. Your pump is running freely (not being cut). Investigate the root cause (check for low water, blockages, stuck float switch), then tap "Reset Lockout" in the app or press the button on the device. |
| False alerts during storms | Heavy storms can cause unusual pump behavior — longer runs, more frequent cycles. The Monitor uses statistical analysis that accounts for normal variation, but extreme weather can occasionally trigger alerts. If this is a recurring problem, you can turn off "Cut pump power" for Excessive Run alerts in Configure. |
| Pump has a battery backup charger | The Monitor handles this automatically. It learns two power levels — the charger's constant draw and the pump's active power. No configuration needed. If you're seeing issues, try Reset Statistics to let it re-learn from scratch. |
| How do I update firmware? | Open the app → tap your device → ⋮ → Device Settings → Firmware Update. Select the firmware file and the device will update over WiFi. |
| How do I move the device to a new WiFi network? | Hold the button for 3 seconds until the blue LED starts blinking. Then open the app → Add Device → connect via Bluetooth and enter the new WiFi credentials. |
| I want to use it with a different pump | If you move the Monitor to a different pump, go to ⋮ → Reset Statistics. This clears all learned baselines and starts fresh for the new pump. |
| Does it send notifications? | The Monitor is a local-only device — it does not send push notifications, emails, or texts. For always-on notifications, connect to Home Assistant via MQTT and set up notification automations through the HA companion app. See Section 12. |
| Will it prevent my basement from flooding? | The Monitor protects your pump motor — it detects anomalies and can cut power to prevent motor damage. It does not directly detect water levels or prevent flooding. For flood protection, ensure your pump is properly sized, consider a battery backup system, and use the Monitor's alerts (via Home Assistant) to stay informed when you're away. |
This section is for users who run Home Assistant or other MQTT-based home automation platforms. If you don't know what these are, you can safely skip this section.
The Sump Pump Monitor supports MQTT and is automatically discovered by Home Assistant.
Once connected, Home Assistant auto-discovers 25 entities:
Binary Sensors: Pump running, Low Power alert, High Power alert, Excessive Run alert, Short Cycling alert, Inactivity alert, Protection auto-disabled
Sensors: Protection mode, Current run duration, Last run duration, Last run time, Total run count, Average run duration, Baseline power, Last outage duration
Number Entities: Alert enable mask, Relay cut mask, Inactivity window, Lockout duration, Max retries
Switches: Relay on/off, Telemetry streaming on/off
Power Sensor: Current power reading (watts)
Buttons: Reset lockout, Reset statistics
Set up HA automations to receive push notifications on your phone. Example triggers:
💡 Tip: Since the Monitor is a local-only device with no push notifications, Home Assistant + MQTT is the recommended way to get alerts when you're away from home. Install the HA companion app on your phone for push notifications.
For full MQTT topic reference and HA configuration details, see the MQTT & Home Assistant Reference.
This section is for developers and tinkerers. If you don't know what a REST API is, you can safely skip this section.
The Monitor exposes a full REST API on your local network. Each device announces a .local hostname based on its device name:
http://pumpfuse-ab12.local/api/v1/Query pump status, read alert history, trigger lockout resets, and adjust settings — all via standard HTTP requests. No authentication required (local network only). No cloud dependency.
# Check pump status
curl http://pumpfuse-ab12.local/api/v1/sump/status
# Get alert history
curl http://pumpfuse-ab12.local/api/v1/sump/history
# Reset lockout
curl -X POST http://pumpfuse-ab12.local/api/v1/sump/lockout/resetFor full API documentation, see the REST API Reference.
The Monitor includes a built-in MCP server (Model Context Protocol) that allows AI assistants to monitor and control your device using natural language.
Compatible with:
The MCP endpoint is available at:
http://pumpfuse-ab12.local/api/v1/mcpWith MCP, you can ask your AI assistant things like:
For MCP setup instructions, see the MCP Integration Guide.
⚠️ Important: Power anomaly protection helps prevent motor damage but cannot guarantee protection in all scenarios. Always maintain your sump pump according to manufacturer guidelines. For comprehensive flood protection, combine with a water level alarm and battery backup system.
Returns: 30-day return policy through Amazon. See your Amazon order for return instructions.
Support:
Firmware Updates: Available through the PumpFuse app. Open your device → ⋮ → Device Settings → Firmware Update.
PumpFuse Sump Pump Monitor — Your pump protects itself.