FloodStop 3/8" Flood Protection System

For dishwashers, toilets, or other 3/8" compression connections

Your home is one of your most valuable assets, so protecting it from potential damage is a wise decision, especially when it can be done so inexpensively. When considering how costly floor and sub-floor repairs can be, investing in a FloodStop system is an easy solution. Designed to stop the water source as soon as a leak is detected, these systems immediately respond by shutting off the flow of water to the dishwasher or toilet, saving you potentially thousands of dollars in repair costs. Just one of many solutions to your home protection and repair needs, offered by PlumbingSupply.com®!

Prop 65 warning
California Proposition 65 Warning
WARNING: These products contain lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information.
(California law requires this warning to be given to customers in the State of California.)

Items with lead are NOT for use in potable water systems and are only for industrial non-drinking water applications

FloodStop System for Dishwashers or Toilets

FloodStop system for Dishwashers or Toilets
FloodStop Components:
  • One Brass Motorized Ball Valve (3/8 inch Compression Fitting)
  • One Control Unit with Battery Backup and 30" cord to the valve
  • One Water/Leak Sensor with 7' cord
  • One Transformer: 120 Volt AC Input - 9 Volt DC Output with 6' cord
  • Power Option: Can use 4 each "AA" Batteries as Primary Power Source (batteries not included) - batteries should be installed for battery back-up when used with the 120 volt transformer
  • One 6" Output Contact Wire
  • Motorized ball valve rated 0-180 psi

Can you imagine coming home from a long weekend or a week-long vacation only to find water covering your entire floor? It happens all the time. Dishwasher leaks are often small and go unnoticed until significant damage is finally discovered. Such a leak will continue to collect under the dishwasher and then seep between the kitchen flooring and sub-flooring. Likewise, a toilet can cause you just as much grief if the fill valve sticks and water overflows the tank. The overflow event typically takes a couple of minutes to begin and often goes unnoticed long after the occupant has left the bathroom. You can help prevent this from happening to you. Whether caused by a small continuous leak, broken component, leaking seal, overflow or a ruptured supply line, the FloodStop is designed to automatically shut off the water supply and sound an alarm to alert you. Additional output contacts are included which allow the "controller" to connect with an existing alarm, home automation or auto-dialer system if so desired. And, after the problem has been resolved, simply wipe the sensors dry and press the green "open" button on the control unit to reset the system.

#FS 3/8-C (V-4) - 3/8" Compression FloodStop System = $171.80
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Optional Accessories

Description Price & Quantity
FSAS - Additional Sensors for FloodStop Systems
- Increases the area that is monitored for flooding
- Quicker detection of flooding which closes the valve sooner and helps reduce costly water damage
- Easy to connect, simply daisy chain as many sensors as you would like
FSC2VEW - Controller to motorized ball valve extension wire
extends reach by 9 feet
FSTEW - Transformer to controller extension wires (86" length)
Limited to Stock on Hand
3/4" x 1/8" Brass Bushing $5.44
3/4 x 1/4" Brass Bushing $7.07
3/4" x 3/8" Brass Bushing $2.13
3/4" x 1/2" Brass Bushing $4.61
3/4" Fips x 1/2" S Copper Reducing Adapter $6.99
3/4" x 1/2" Brass Reducing Coupling (AKA Bell Reducer) $8.11
3/4" Fips x 1/2" OD Compression Brass Adapter $11.38
3/4" Fips x 5/8" OD Compression Brass Adapter $4.29

to flexible supplies for dishwashers - 3/8" compression - to flexible supplies for toilets

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More Information About This FloodStop System

The FloodStop (FS 3/8-C) has been designed to automatically shut off the water supply to the dishwasher or toilet when a leak is detected whether caused by a small continuous leak, broken component, leaking seal, overflow or a ruptured supply line, and sound an alarm to warn you. Additional output contacts are included which allow the "controller" to connect with your existing alarm, home automation or auto-dialer systems if so desired.

After the problem has been resolved, simply wipe the sensors dry and press the green "open" button on the control unit to reset the system.

This amazing valve can be powered by the included AC Adaptor/Transformer (120 Volt AC Input - 9 Volt DC Output transformer with 6 ft. cord) OR it can be powered with 4 each "AA" Batteries as the primary power source if an electrical outlet is not nearby. You should be able to easily install this valve in 15 minutes from start to finish, provided you have all of your ducks in a row, and your spouse or partner doesn't interrupt you.

1-Year Manufacturer's Warranty.

The FloodStop FS 3/8-C can be used anywhere requiring potable drinking water products.

How the FloodStop (FS 3/8-C) Works:
  1. The FloodStop valve is connected to the angle stop and supply line
  2. Water leak sensor is placed at the base of the appliance or fixture (dishwasher, toilet, 3/8" ice maker, etc.)
  3. Valve stays open until water loss is detected
  4. Water on sensor closes FloodStop valve and sounds alarm
  5. Valve stays closed until problem is attended to and system is reset

Please always make sure that you take the precaution of following the regular maintenance and inspections (included in your FloodStop package) required to ensure that you are protected.

  • Brass Motorized Ball Valve (3/8 inch Compression Fitting) - 2-3/4"(L) x 3"(H) x 1-3/4"(W)
  • Control Unit with Battery Backup and 30" cord - 4-3/4"(L) x 4-3/4"(H) x 1"(W)
  • Water/Leak Sensor with 7' cord - 7-1/2"(L) x 1-1/4"(W) x 1/8"(H)
Note: FloodStops can help prevent flooding, but do not provide 100% guaranteed flood protection. We cannot be held liable for any damages that may occur when flood stops are installed. Always refer to the owner's manual and perform maintenance per the manufacturer's recommendations.

Related Items & Articles

Frequently Asked Questions

Q. "How does it work?"
A. Simple! You'll install a FloodStop motorized ball valve(s) upstream of each supply line and place our water sensor on the floor behind the unit that needs detection. If water leaks due to a broken line or the failure of ANY internal component of your plumbing fixture, the control unit tells the motorized ball valve(s) to shut off the water and sound an alarm.

Q. "So these systems can help prevent leaks or flooding?"
A. They really can't help prevent leaks. They can help prevent flooding by shutting off the water if a leak happens.

Q. "If there is no electricity running to the valve (either because they haven't been hooked up or the sensor has touched water), are the valves normally open or closed?"
A. In their normal position, the FloodStop valves are open and will allow water to pass through; once water touches their sensor, the motorized ball valve is tripped and the valves are closed. The valve(s) will remain closed until the sensors are dried and the reset "Open" button is pressed. The Controller has a battery port for 4 X AA size batteries, which will serve as a battery backup in case of a power outage. The same batteries will serve as the primary power source if a nearby electrical outlet is not available (battery life 1 year).

Q. "Does the FloodStop system shut off water to the whole house?"
A. No, this is a point of use product; it only shuts the water off at the source of the leak. Why shut off the water to your whole house if the cause of the problem is just at the washing machine, for instance? Whole house systems are much more expensive and usually require a plumber to install.

Q. "What should I do after the system has detected a leak?"
A. If a leak has occurred, turn the manual valve(s) to the off position, investigate and repair/stop the leak, dry the sensor, and reset the controller by pressing the "Open" button.

Q. "Are FloodStop systems difficult to install?"
A. No, if you can install a garden hose, you can install FloodStop. Installation takes 5 to 10 minutes, and your home will be protected against many sources of water damage.

Q. "Why would I need an additional sensor?"
A. You can increase your area of protection by adding extra sensors near the fixtures or appliances you have selected to protect. If you want more protection for your washing machine FloodStop valves you can add another sensor behind your dryer or laundry tray/sink or maybe a low spot on the floor where water tends to puddle. Or if the water heater FloodStop is purchased then additional sensors can also be placed in your water heater's drain pan, as well as on the floor nearby (in case a leak sprays outside the pan). Or if you want a quicker detection for your icemaker FloodStop, you may choose to install a sensor under your icemaker valve, another behind the refrigerator and a third near your icemaker's filter (if you have one).

Q. "What about braided hoses, aren't they burst proof?"
A. You should use braided hoses whenever you can (especially on your washing machine), and take every precaution to avoid water damage, but hoses are not the only source of flooding. And, braided hoses are not burst proof, but only burst resistant. There are a wide variety of clamps, valves, pumps, drains, etc. inside many fixtures that can fail. (FloodStop was designed after the inventor suffered a home flood due to a switch failure that did not tell his washing machine when to stop filling with water. Water continued to run into the washer and flooded the house for 3 hours before it was discovered).

Q. "I'm hearing a lot about lead-free these days. What does that have to do with plumbing products and how does the new lead-free legislation affect me?"
A. Basically, the laws implemented Jan. 1st, 2014 require plumbing products that come in contact with drinking water to be "essentially lead free" (less than 0.25% weighted average). For further information about how the law determines what is "lead free", rules regarding which plumbing products must be "lead free", and who these laws will affect, please view our page.

Q. "Will this system also turn off the electricity to my dishwasher?"
A. No, the FloodStop will turn off the water supply but not the electrical power. We do offer the WaterWatcher, which is designed to turn off the electrical power to the appliance, but will not turn off the water supply. read further about the WaterWatcher.

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