Water Heater Leak Detector Kit, 3/4" NPT MIP x FIP

10 YEAR UPDATE: So I've had this thing in place now for a few months shy of 10 years. It has saved my butt on multiple occasions, nothing major but assorted dripping valves and the like. All I've had to do with it is change the batteries every few years, and I also wired the alarm contacts into my home alarm system. That's it. It still looks and works the same as it did the day I bought it. I'm going to buy another as a backup, although the way things are going I may never need it. ------ A few weeks ago, my neighbor was essentially flooded out of his house by a balky washing machine left unattended. I have watched contractors come and go, ripping up flooring, moving in fans and dehumidifiers, and totally disrupting these peoples' lives, and these events were a stark reminder to me of how a relatively minor issue can quickly escalate into a major catastrophe. Three weeks, and they are still unable to return home. So with this fresh in my mind I began searching for something...anything...that might offer at least some assurance that this wouldn't happen to me. That's when I ran across the Floodstop system. I know that this particular valve and controller were designed for water heater protection only, but like many people (look on YouTube) I elected to install it right at my water main. Luckily I had already installed a GE whole house carbon filter a couple years ago, and that was plumbed in using flexible water heater supply lines. That made adding this a relatively easy task. I screwed in a 3/4" compression adapter into the inlet side of the valve, connected that to my inlet piping, and screwed the existing flex line feeding the filter to the male outlet of the valve. I placed the controller on the garage wall nearby, but then I was left with running sensor wires to 9 different locations, with only an attic crawlspace to work in. I had a large spool of 22 gauge, 4 conductor telephone station wire, and that worked out well. I did drops from the attic and down the inside of the walls, poking through near the baseboard at 3 sinks, 2 toilets, my dishwasher, clothes washer, fridge icemaker, and water heater. The attic ends of these wires were all soldered together in parallel at a convenient location with one final wire running into the garage and down to the controller. As for the actual sensors, I utilized the one supplied with the system at the water heater, but elected to make my own for the other 8 drops. I have a pretty strong electrical and electronics background, so was able to make these sensors, based on the original, from 8, 2" x 4" pieces of 'perf board' and 16, 3 1/2 foot long lengths of 22 gauge, uninsulated tinned copper wire. Once I soldered the sensors to the various drops, I carefully tested each one several times, and observed the electric valve close consistently and the controller go into alarm during each test. Needless to say, this was a fairly substantial project--much more so than just protecting the water heater. Still, it was in my mind well worth the planning and effort. After having the system in place for a week or so, I feel that the overall quality of the valve, and some fairly advanced features offered by this controller, (monthly self test of the valve with no action needed on my part, full battery backup, etc) were well worth the investment in money and time. Obviously nothing in life is a sure thing, but at least the Floodstop system will I believe shift the odds in my favor when it comes to avoiding the kinds of headaches experienced by my neighbors and others I know, and at a cost that's 1/8th of my insurance deductible.....

Works fine when tested both by wetting the paper and touching the conductors on the sensor. Installing extra sensor for washing machine, snd added one for condensation overflow from A/C. Shutting off the water doesn't help, but it will give an alert. (It has only happened once in 15 years. I don't like the serial connection so will test with 2 sensors in parallel. "Manifold" is overpriced.

Works as advertised. Replaced an older rusted valve, with this one. Recommend this so water does not continually flow in case the water heater leaks. The sensor quickly senses water in the drain pan and shuts off the water supply to the water heater. It installs in less than 15 minutes.

I bought the FloodStop Water Heater Auto-Shutoff Valve, FS3/4NPT, V4 Controller, Water Damage Prevention two years ago for $125. I installed it where the water pipe comes into the house, just after the meter and before the water pipe branches are. I bought extra sensors to protect the water heater, clothes washer, dishwasher, refrigerator, and to the basement utility sink areas. A major leak anywhere else in the house will eventually run down to the basement by the utility sink. Possibly I may install sensors by each toilet some day. It’s now extremely easy to press the button to shut off the water if we are leaving for an extended period of time. The sensors are very sensitive. One drop of water, and the flood stop shuts the whole house water off. You need to locate and fix the problem, dry the sensor, and turn the water back on. Assuming you have an individual shut off at the offending site, you can turn the water back on for the rest of the house. I installed a flood stop bypass line with a normally closed valve if you need to turn the water back on, and don’t want to do the somewhat complicated procedure to the valve to manually turn the water back on before the sensor dries, or if the valve fails closed. A neighbor saw this and thought it would be a good idea for his winter house in Florida. He is looking at a “smart WiFi” leak sensor instead. I prefer the flood stop. The flood stop will turn the water off immediately and does not require a monthly subscription payment. The smart WiFi sensor notifies your phone. You must respond to shut the water off. The water leak will continue until you do. I prefer the flood stops immediate shut off and no monthly fee.

I purchased this to replace an existing unit that was installed by the plumbing company ten years ago when they replaced our water heater in the attic. I noticed alternating flashing lights that would not reset and melting solder on the batteries. Then I noticed the existing black power smoldering in the outlet. Recommend checking these as they age especially in a hot attic environment. This product can easily pay for itself if one ever has a water heater leak.

Wonderful! It just works! I spent hours trying to get YoLink to work and it would send me a notice in the app is there was a leak but not shut off the water. I gave up and bought this one and it shuts the water off immediately! Love it!

I purchased this unit to replace an old Floodstop valve when I was also replacing my water heater. Installation of the new valve went smoothly, although I agree with comments about the wires being a little short to both the valve and the sensor. I didn't want to lengthen them, so the control unit's placement isn't optimal. I also found that my valve came in the "off" position, so I had to power up the unit and open the valve before installing it, otherwise I wouldn't have had water flow to fill the new heater. The reason for the four-star rating is that I found that my old Floodstop control unit was dead. I had ordered this replacement because I was worried that the original (10-year old) Floodstop valve might have corroded up over the years, but I wasn't expecting the electronics to fail. Of course, the warranty is only for one year, but I'd prefer a warranty comparable to the life of water heaters (my old one was 10 years, my new one is 12, and I replace the in-house heater when the warranty is up, instead of waiting for a disaster to happen).

Fast delivery. Easy installation Great product.

Very well Made product, easy to hookup Used this one as a whole house shut-off

only used for 2 weeks now but passed all test. I'm using mine right off of water meter. everything is in one room so I figure may as well put it where it counts

Great product. Had problems putting wires in the right place at first but seller helped me out with several helpful emails. Very good and very helpful people. Thanks again T Martin

I am happy with it in case of water pipe brake and water leak it will shut off main water supply.

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