Review: First Alert L1 WiFi Water Leak and Freeze Detector (with cable)

2026-01-31

Quick take

A smart leak detector from First Alert aimed at basement; water heater; sump area.

Your take

[Add your opinion and any personal testing notes here.]

Key specs

• Price range: varies
• Dimensions: 3.9 x 2 x 1.1 in
• Materials:
• Power/Battery: battery operated (2 batteries)
• Warranty: 2 years

Who it's for

basement; water heater; sump area

Pros

• loud alarm
• cable sensor
• temp/freeze monitoring

Cons

• needs Wi-Fi/app setup

Alternatives

Moen Smart Leak Detector; D-Link DCH-S161

Scores

• Overall: /10
• Value: /10
• Durability: /10
• Usability: /10
• Niche-specific: /10

What I verified

Add your verification: cable placement, alarm loudness, app alert test.

Evidence tier

A

Sources

• Official product page: https://www.firstalert.com/us/en/products/water-products/water-leak-detection/wifi-water-leak-and-freeze-detector-and-cable-rwld3001-001-s/
• Retailer page: https://www.firstalertstore.com/store/products/wifi-water-leak-and-freeze-detector-first-alert-l1.htm
• Affiliate primary:
• Affiliate secondary:
• Evidence (official): https://www.firstalert.com/us/en/products/water-products/water-leak-detection/wifi-water-leak-and-freeze-detector-and-cable-rwld3001-001-s/
• Evidence (retailer): https://www.firstalertstore.com/store/products/wifi-water-leak-and-freeze-detector-first-alert-l1.htm
• Evidence (third-party):