Moen Flo 3/4 in + 3 Detectors review
Moen Flo 3/4 in Smart Water Shutoff with 3 Flo Smart Water Detectors Bundle
By Tom Calder
The 3/4 in in-line shutoff plus three Flo detectors you place near the water heater, washer or sump. Detectors cover sources the in-line valve cannot see.
- Best for
- Main shutoff plus point-of-leak sensors
- Skip it if
- Your main is larger than 3/4 inch
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Shutoff plus three point sensors
- Detectors sense moisture from rain or sump overflow, which the valve can't (maker)
Worth knowing
- Plumber install for the shutoff
- Amazon bundle contents not confirmed from the maker
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Who shouldn't buy this
Don't buy it if your main is larger than 3/4 inch.
Key specs
| Pipe size | 3/4 in or smaller pipe |
| Install | Plumber install (cuts into main) |
| Detects by | In-line flow + 3 leak detectors |
| Connects by | Wi-Fi 2.4 GHz + AC power |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Whole-home auto shutoff on a 3/4 in main
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Whole-home auto shutoff on a larger main
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for Whole-home shutoff with freeze warnings
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