Reddit reviews Samsung GP-U999SJVLCAA Smart Things Water Leak Sensor - Automate Lights & Siren For Alert - ZigBee, Accessory Hub, White

I standardized on Z-Wave and Zigbee stuff - more Z-Wave than Zigbee. I used a SmartThings hub in this house, and so I used these sensors. I put one under each sink in the house, plus one near the main stack in the basement and the hot water heater.

If I could, I'd also recommend adding a couple of HA CO/smoke sensors. Again, z-wave for me, but I used this First Alert model. If I get smoke or CO at any time, it alerts my phone, and I'm a huge fan of that.

One note on those smoke detectors - some places have highly specific laws on what smoke detectors you must legally have, and these do not match code where I live. I run double sets - one set that matches code and then this set for the HA side. It's not a problem to have more smoke/CO detectors, and it's a cheap and potentially life or property saving upgrade.

They're readily available. Amazon has them....

SmartThings Version 3 Hub (I have the Version 2 Hub...you will have to look around for this one):
https://www.amazon.com/Samsung-SmartThings-Generation-GP-U999SJVLGDA-Automation/dp/B07FJGGWJL/ref=sr_1_1_sspa?ie=UTF8&qid=1540989501&sr=8-1-spons&keywords=smartthings+hub+2nd+generation&psc=1

GE Z-Wave Plus On/Off Light Switch:
https://www.amazon.com/GE-Repeater-Required-Works-SmartThings-14291/dp/B01M1AHC3R/ref=sr_1_3?ie=UTF8&qid=1540989582&sr=8-3&keywords=z-wave+switch

GE Z-Wave Plus Dimmer Switch:
https://www.amazon.com/GE-Repeater-Required-Works-SmartThings-14291/dp/B07361Y54Z/ref=sr_1_3?ie=UTF8&qid=1540989582&sr=8-3&keywords=z-wave%2Bswitch&th=1

GE Add On Switch (if you have a 3-way or 4-way switch):
https://www.amazon.com/GE-Bluetooth-Wireless-STANDALONE-12723/dp/B00RKJS8MQ/ref=sr_1_3?ie=UTF8&qid=1540989718&sr=8-3&keywords=z-wave+add+on+switch

ZigBee Motion Sensors:
https://www.amazon.com/gp/product/B07F8ZHBLS/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

ZigBee Door Sensors:
https://www.amazon.com/gp/product/B07F956F3B/ref=oh_aui_detailpage_o01_s00?ie=UTF8&th=1

ZigBee Leak Sensors:
https://www.amazon.com/gp/product/B07F951JDP/ref=oh_aui_detailpage_o01_s00?ie=UTF8&th=1

ZigBee Outlet Plug (you will need to replicate your ZigBee mesh, I use to motion activate lamps, turn lamps on/off at sunset/sunrise, etc.):
https://www.amazon.com/gp/product/B07F96JB63/ref=oh_aui_detailpage_o01_s00?ie=UTF8&th=1

Z-Wave Thermostat:
https://www.amazon.com/gp/product/B005EJ7YO2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

ZigBee RGB Landscape RGB LED Strips:
https://www.amazon.com/gp/product/B00R1PB2ZY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

ZigBee RGB Lightbulbs:
https://www.amazon.com/gp/product/B073ZBYXKQ/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Z-Wave Deadbolt:
https://www.amazon.com/Kwikset-SmartCode-Electronic-SmartThings-featuring/dp/B004F1B24I/ref=sr_1_12?s=hi&ie=UTF8&qid=1540990126&sr=1-12&keywords=z-wave+lock

Z-Wave Garage Door Opener:
https://www.amazon.com/GoControl-Linear-GD00Z-4-Z-Wave-Controller/dp/B00M75TEIU/ref=sr_1_4?s=hi&ie=UTF8&qid=1540990160&sr=1-4&keywords=z-wave+garage+door+opener

Sonos One Speakers (Great music, and talking through SmartThings):
https://www.amazon.com/gp/product/B074XN1LH3/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Amazon Echo Show (for Voice Control...an Echo Dot will work just fine too):
https://www.amazon.com/All-new-Echo-Show-2nd-Gen/dp/B077SXWSRP/ref=sr_1_1?s=electronics&ie=UTF8&qid=1540990254&sr=1-1&keywords=echo+show

That's about all I can think of at the moment.

If you are going to do this, do it in stages. Z-Wave and ZigBee are mesh networks...meaning that the reliability of the network gets much better the more devices you have. Also, with these mesh networks:

• Battery operated devices DO NOT reinforce the mesh
  
• The only devices that reinforce the mesh are devices that are always powered from the mains
  
  I see so many people complaining about how the Z-Wave or ZigBee devices don't work, when they are relying on too many battery operated devices.
  
  For Z-Wave devices, choose Z-Wave Plus over Z-Wave...it's the newest standard, and has much better range.
  
  In the US, Z-Wave operates in the 900 MHz spectrum and ZigBee in the 2.4 GHz spectrum. Personally, I "prefer" Z-Wave devices as there is a lot of "junk" in the 2.4 GHz spectrum right now. However, the ZigBee devices are operating reliably as I have a strong mesh setup (with non-battery operated devices).
  
  Two great application for the Leak Sensors:
  
  
• Near your hot water heater (when they go, they always leak)
  
• Under your A/C drip pan (if you have central air)
  
  Great applications for door open/close sensors:
  
  
• Turn closet lights on/off when the door opens or closes
  
• Turn on entry and hallway lights when an entry door opens, but only when it's dark (30 minutes before sunset or after sunrise)...turn off 1 minute later
  
• Notify me when my gun safe is opened
  
  Great Application for Motion Sensors
  
  
• Turn on outside ceiling fans (but only if the temp is above 72 degrees)
  
• Turn on lamps while motion is active when it's dark
  
  The motion sensors I linked above are the new ones...the magnetically mount. What's cool is that the magnet is in the sensor, and it's strong enough to attach the sensor to a dry wall screw (no need to mount the adapter bracket).

I just tried the newest version of the SmartThings leak sensor. The older model was officially supported but this one appears not to be so far. That said, they pair just fine and show up as a door, so you can set up a robot using them. They’re only $20, and they detect water underneath the sensor as well as on top. I just picked one up the other day so I can’t comment on battery life yet.

Samsung GP-U999SJVLCAA Smart things Water Leak Sensor - Automate Lights & Siren For Alert - ZigBee, White https://www.amazon.com/dp/B07F951JDP/ref=cm_sw_r_cp_api_qA26Bb56PHQ3W

Price History

Wouldn't something like this Samsung water leak sensor have saved you? Granted in a whole room of pipes, I have no idea how many you'd need for full coverage. But you could put 3 of them below major pipes and leave it to fate. They're small enough to get wet fairly quickly assuming water is filling up the room

this seems like a less expensive option.... but it appears one would need the smart things hub... anyone use that? https://www.amazon.com/Samsung-GP-U999SJVLCAA-Smart-things-Sensor/dp/B07F951JDP/ref=mp_s_a_1_3?keywords=zigbee+water+sensor&qid=1568313738&sr=8-3

Samsung GP-U999SJVLCAA Smart Things Water Leak Sensor - Automate Lights & Siren For Alert - ZigBee | Accessory to Smart Things Hub White https://www.amazon.com/dp/B07F951JDP/ref=cm_sw_r_cp_api_i_gb9FDbSETZA79